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338 lines
14 KiB
338 lines
14 KiB
// |
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// SGScanView.m |
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// SGQRCodeExample |
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// |
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// Created by kingsic on 2017/8/23. |
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// Copyright © 2017年 kingsic All rights reserved. |
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// |
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#import "SGScanView.h" |
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#import "SGScanViewConfigure.h" |
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#import "SGWeakProxy.h" |
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#import "SGQRCodeLog.h" |
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@interface SGScanView () |
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@property (nonatomic, strong) SGScanViewConfigure *configure; |
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@property (nonatomic, strong) UIView *contentView; |
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@property (nonatomic, strong) UIImageView *scanlineImgView; |
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@property (nonatomic, strong) CADisplayLink *link; |
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@property (nonatomic, assign) BOOL isTop; |
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@property (nonatomic, assign) BOOL isSelected; |
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@end |
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@implementation SGScanView |
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- (void)dealloc { |
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if ([SGQRCodeLog sharedQRCodeLog].log) { |
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NSLog(@"SGScanView - - dealloc"); |
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} |
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} |
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- (instancetype)initWithFrame:(CGRect)frame configure:(SGScanViewConfigure *)configure { |
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if (self = [super initWithFrame:frame]) { |
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self.configure = configure; |
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self.backgroundColor = [UIColor clearColor]; |
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[self initialization]; |
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[self addSubview:self.contentView]; |
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UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap_action)]; |
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tap.numberOfTapsRequired = 2; |
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[self addGestureRecognizer:tap]; |
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} |
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return self; |
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} |
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+ (instancetype)scanViewWithFrame:(CGRect)frame configure:(SGScanViewConfigure *)configure { |
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return [[SGScanView alloc] initWithFrame:frame configure:configure]; |
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} |
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- (void)initialization { |
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CGFloat w = 0.7 * self.frame.size.width; |
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CGFloat h = w; |
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CGFloat x = 0.5 * (self.frame.size.width - w); |
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CGFloat y = 0.5 * (self.frame.size.height - h); |
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_borderFrame = CGRectMake(x, y, w, h); |
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_scanFrame = CGRectMake(x, y, w, h); |
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self.isTop = YES; |
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} |
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- (UIView *)contentView { |
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if (!_contentView) { |
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CGFloat x = _scanFrame.origin.x; |
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CGFloat y = _scanFrame.origin.y; |
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CGFloat w = _scanFrame.size.width; |
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CGFloat h = _scanFrame.size.height; |
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_contentView = [[UIView alloc] initWithFrame:CGRectMake(x, y, w, h)]; |
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_contentView.backgroundColor = [UIColor clearColor]; |
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_contentView.clipsToBounds = YES; |
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} |
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return _contentView; |
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} |
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- (UIImageView *)scanlineImgView { |
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if (!_scanlineImgView) { |
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_scanlineImgView = [[UIImageView alloc] init]; |
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/// 静态库 url 的获取 |
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NSURL *url = [[NSBundle mainBundle] URLForResource:@"SGQRCode" withExtension:@"bundle"]; |
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if (!url) { |
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/// 动态库 url 的获取 |
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url = [[NSBundle bundleForClass:[self class]] URLForResource:@"SGQRCode" withExtension:@"bundle"]; |
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} |
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NSBundle *bundle = [NSBundle bundleWithURL:url]; |
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UIImage *image = [UIImage imageNamed:self.configure.scanline inBundle:bundle compatibleWithTraitCollection:nil]; |
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if (!image) { |
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image = [UIImage imageNamed:self.configure.scanline]; |
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} |
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_scanlineImgView.image = image; |
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if (image) { |
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[self updateScanLineFrame]; |
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} |
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} |
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return _scanlineImgView; |
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} |
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- (void)tap_action { |
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if (self.isSelected) { |
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self.isSelected = NO; |
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} else { |
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self.isSelected = YES; |
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} |
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if (self.doubleTapBlock) { |
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self.doubleTapBlock(self.isSelected); |
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} |
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} |
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- (void)drawRect:(CGRect)rect { |
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[super drawRect:rect]; |
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if (self.configure.isShowBorder == NO) { |
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return; |
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} |
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/// 边框 frame |
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CGFloat borderW = self.borderFrame.size.width; |
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CGFloat borderH = self.borderFrame.size.height; |
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CGFloat borderX = self.borderFrame.origin.x; |
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CGFloat borderY = self.borderFrame.origin.y; |
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CGFloat borderLineW = self.configure.borderWidth; |
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/// 空白区域设置 |
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[self.configure.color setFill]; |
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UIRectFill(rect); |
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// 获取上下文，并设置混合模式 -> kCGBlendModeDestinationOut |
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CGContextRef context = UIGraphicsGetCurrentContext(); |
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CGContextSetBlendMode(context, kCGBlendModeDestinationOut); |
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// 设置空白区 |
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UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX + 0.5 * borderLineW, borderY + 0.5 *borderLineW, borderW - borderLineW, borderH - borderLineW)]; |
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[bezierPath fill]; |
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// 执行混合模式 |
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CGContextSetBlendMode(context, kCGBlendModeNormal); |
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/// 边框设置 |
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UIBezierPath *borderPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX, borderY, borderW, borderH)]; |
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borderPath.lineCapStyle = kCGLineCapButt; |
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borderPath.lineWidth = borderLineW; |
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[self.configure.borderColor set]; |
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[borderPath stroke]; |
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CGFloat cornerLength = self.configure.cornerLength; |
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CGFloat insideExcess = fabs(0.5 * (self.configure.cornerWidth - borderLineW)); |
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CGFloat outsideExcess = 0.5 * (borderLineW + self.configure.cornerWidth); |
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/// 左上角小图标 |
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[self leftTop:borderX borderY:borderY cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess]; |
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/// 左下角小图标 |
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[self leftBottom:borderX borderY:borderY borderH:borderH cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess]; |
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/// 右上角小图标 |
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[self rightTop:borderX borderY:borderY borderW:borderW cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess]; |
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/// 右下角小图标 |
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[self rightBottom:borderX borderY:borderY borderW:borderW borderH:borderH cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess]; |
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} |
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- (void)leftTop:(CGFloat)borderX borderY:(CGFloat)borderY cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess { |
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UIBezierPath *leftTopPath = [UIBezierPath bezierPath]; |
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leftTopPath.lineWidth = self.configure.cornerWidth; |
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[self.configure.cornerColor set]; |
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if (self.configure.cornerLocation == SGCornerLoactionInside) { |
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[leftTopPath moveToPoint:CGPointMake(borderX + insideExcess, borderY + cornerLength + insideExcess)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + insideExcess)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength + insideExcess, borderY + insideExcess)]; |
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) { |
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[leftTopPath moveToPoint:CGPointMake(borderX - outsideExcess, borderY + cornerLength - outsideExcess)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY - outsideExcess)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength - outsideExcess, borderY - outsideExcess)]; |
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} else { |
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[leftTopPath moveToPoint:CGPointMake(borderX, borderY + cornerLength)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX, borderY)]; |
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength, borderY)]; |
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} |
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[leftTopPath stroke]; |
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} |
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- (void)rightTop:(CGFloat)borderX borderY:(CGFloat)borderY borderW:(CGFloat)borderW cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess { |
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UIBezierPath *rightTopPath = [UIBezierPath bezierPath]; |
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rightTopPath.lineWidth = self.configure.cornerWidth; |
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[self.configure.cornerColor set]; |
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if (self.configure.cornerLocation == SGCornerLoactionInside) { |
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength - insideExcess, borderY + insideExcess)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + insideExcess)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + cornerLength + insideExcess)]; |
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) { |
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength + outsideExcess, borderY - outsideExcess)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY - outsideExcess)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + cornerLength - outsideExcess)]; |
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} else { |
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength, borderY)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY)]; |
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY + cornerLength)]; |
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} |
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[rightTopPath stroke]; |
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} |
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- (void)leftBottom:(CGFloat)borderX borderY:(CGFloat)borderY borderH:(CGFloat)borderH cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess { |
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UIBezierPath *leftBottomPath = [UIBezierPath bezierPath]; |
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leftBottomPath.lineWidth = self.configure.cornerWidth; |
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[self.configure.cornerColor set]; |
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if (self.configure.cornerLocation == SGCornerLoactionInside) { |
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength + insideExcess, borderY + borderH - insideExcess)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - insideExcess)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - cornerLength - insideExcess)]; |
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) { |
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength - outsideExcess, borderY + borderH + outsideExcess)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH + outsideExcess)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH - cornerLength + outsideExcess)]; |
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} else { |
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength, borderY + borderH)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH)]; |
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH - cornerLength)]; |
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} |
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[leftBottomPath stroke]; |
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} |
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- (void)rightBottom:(CGFloat)borderX borderY:(CGFloat)borderY borderW:(CGFloat)borderW borderH:(CGFloat)borderH cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess { |
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UIBezierPath *rightBottomPath = [UIBezierPath bezierPath]; |
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rightBottomPath.lineWidth = self.configure.cornerWidth; |
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[self.configure.cornerColor set]; |
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if (self.configure.cornerLocation == SGCornerLoactionInside) { |
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - cornerLength - insideExcess)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - insideExcess)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength - insideExcess, borderY + borderH - insideExcess)]; |
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) { |
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH - cornerLength + outsideExcess)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH + outsideExcess)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength + outsideExcess, borderY + borderH + outsideExcess)]; |
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} else { |
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW, borderY + borderH - cornerLength)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW, borderY + borderH)]; |
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength, borderY + borderH)]; |
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} |
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[rightBottomPath stroke]; |
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} |
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- (void)setBorderFrame:(CGRect)borderFrame { |
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_borderFrame = borderFrame; |
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} |
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- (void)setScanFrame:(CGRect)scanFrame { |
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_scanFrame = scanFrame; |
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self.contentView.frame = scanFrame; |
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if (self.scanlineImgView.image) { |
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[self updateScanLineFrame]; |
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} |
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} |
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- (void)updateScanLineFrame { |
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CGFloat w = _contentView.frame.size.width; |
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CGFloat h = (w * self.scanlineImgView.image.size.height) / self.scanlineImgView.image.size.width; |
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CGFloat x = 0; |
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CGFloat y = self.configure.isFromTop ? -h : 0; |
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self.scanlineImgView.frame = CGRectMake(x, y, w, h); |
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} |
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- (void)startScanning { |
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if (self.scanlineImgView.image == nil) { |
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return; |
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} |
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[self.contentView addSubview:self.scanlineImgView]; |
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if (self.link == nil) { |
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self.link = [CADisplayLink displayLinkWithTarget:[SGWeakProxy weakProxyWithTarget:self] selector:@selector(updateUI)]; |
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[self.link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes]; |
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} |
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} |
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- (void)stopScanning { |
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if (self.scanlineImgView.image == nil) { |
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return; |
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} |
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// 此代码防止由于外界逻辑，可能会导致多次停止 |
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if (self.link == nil) { |
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return; |
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} |
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[self.scanlineImgView removeFromSuperview]; |
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self.scanlineImgView = nil; |
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[self.link invalidate]; |
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self.link = nil; |
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} |
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- (void)updateUI { |
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CGRect frame = self.scanlineImgView.frame; |
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CGFloat contentViewHeight = CGRectGetHeight(self.contentView.frame); |
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CGFloat scanlineY = self.scanlineImgView.frame.origin.y + (self.configure.isFromTop ? 0 : self.scanlineImgView.frame.size.height); |
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if (self.configure.autoreverses) { |
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if (self.isTop) { |
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frame.origin.y += self.configure.scanlineStep; |
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self.scanlineImgView.frame = frame; |
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if (contentViewHeight <= scanlineY) { |
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self.isTop = NO; |
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} |
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} else { |
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frame.origin.y -= self.configure.scanlineStep; |
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self.scanlineImgView.frame = frame; |
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if (scanlineY <= self.scanlineImgView.frame.size.height) { |
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self.isTop = YES; |
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} |
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} |
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} else { |
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if (contentViewHeight <= scanlineY) { |
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CGFloat scanlineH = self.scanlineImgView.frame.size.height; |
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frame.origin.y = -scanlineH + (self.configure.isFromTop ? 0 : scanlineH); |
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self.scanlineImgView.frame = frame; |
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} else { |
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frame.origin.y += self.configure.scanlineStep; |
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self.scanlineImgView.frame = frame; |
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} |
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} |
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} |
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@end
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