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57 lines
2.0 KiB
57 lines
2.0 KiB
// |
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// XHRefreshCircleView.m |
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// MessageDisplayExample |
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// |
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// Created by 曾 宪华 on 14-6-6. |
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// Copyright (c) 2014年 曾宪华 开发团队(http://iyilunba.com ) 本人QQ:543413507 本人QQ群（142557668）. All rights reserved. |
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// |
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#import "XHRefreshCircleView.h" |
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@implementation XHRefreshCircleView |
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- (id)initWithFrame:(CGRect)frame { |
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self = [super initWithFrame:frame]; |
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if (self) { |
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_heightBeginToRefresh = 50; |
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_offsetY = 0; |
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self.backgroundColor = [UIColor clearColor]; |
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} |
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return self; |
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} |
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+ (CABasicAnimation*)repeatRotateAnimation { |
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CABasicAnimation *rotateAni = [CABasicAnimation animationWithKeyPath: @"transform.rotation.z"]; |
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rotateAni.duration = 0.25; |
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rotateAni.cumulative = YES; |
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rotateAni.removedOnCompletion = NO; |
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rotateAni.fillMode = kCAFillModeForwards; |
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rotateAni.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; |
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rotateAni.toValue = [NSNumber numberWithFloat:M_PI / 2]; |
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rotateAni.repeatCount = MAXFLOAT; |
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return rotateAni; |
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} |
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- (void)drawRect:(CGRect)rect { |
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CGContextRef context = UIGraphicsGetCurrentContext(); |
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CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:173 / 255.0 green:53 / 255.0 blue:60 / 255.0 alpha:1].CGColor); |
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CGContextSetLineWidth(context, 1.f); |
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static CGFloat radius = 9; |
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if (!_isRefreshViewOnTableView) { |
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static CGFloat startAngle = M_PI / 2; |
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CGFloat endAngle = (ABS(_offsetY) / _heightBeginToRefresh) * (M_PI * 19 / 10) + startAngle; |
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CGContextAddArc(context, CGRectGetWidth(self.frame) / 2, CGRectGetHeight(self.frame) / 2, radius, startAngle, endAngle, 0); |
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} else { |
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static CGFloat startAngle = 3 * M_PI / 2.0; |
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CGFloat endAngle = (ABS(_offsetY) / _heightBeginToRefresh) * (M_PI * 19 / 10) + startAngle; |
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CGContextAddArc(context, CGRectGetWidth(self.frame) / 2, CGRectGetHeight(self.frame) / 2, radius, startAngle, endAngle, 0); |
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} |
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CGContextDrawPath(context, kCGPathStroke); |
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} |
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@end
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