leKanShouHu-ios/tongxin/MyTabBar.m

//
//  MyTabBar.m
//  CustomTabbarViewController
//
//  Created by duanshengwu on 2019/7/11.
//  Copyright © 2019 D-James. All rights reserved.
//

#import "MyTabBar.h"
#import "UIViewExt.h"
@interface MyTabBar ()

@property (strong, nonatomic) UIButton *centerTabBarBtn;
@property (strong, nonatomic) UILabel *titleLabel;

@end

@implementation MyTabBar

#define kBottomSafeSpace (iPhoneX ? 34.0 : 0.0)

- (instancetype)init{
    if (self = [super init]){
        [self initView];
    }
    return self;
}

- (void)initView{
    UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(0, -10, ScreenWidth, kBottomSafeSpace+80)];
    
    // 加载图片
    UIImage *image = [UIImage imageNamed:@"tabBar_background"];
    
    // 设置不拉伸区域
    CGFloat top = 25;
    CGFloat left = 0;
    CGFloat bottom = 0;
    CGFloat right = 0;
    
    // 拉伸图片
    UIImage *bgImage = [image resizableImageWithCapInsets:UIEdgeInsetsMake(top, left, bottom, right) resizingMode:UIImageResizingModeStretch];
    
    UIImageView *imageView = [[UIImageView alloc] initWithImage:bgImage];
    imageView.contentMode = UIViewContentModeScaleToFill;
    imageView.frame = backView.frame;
    [backView addSubview:imageView];

    [self insertSubview:backView atIndex:0];
    
    // 去除顶部横线
    [self setBackgroundImage:[UIImage new]];
    [self setShadowImage:[UIImage new]];

}

// layoutSubviews遍历子控件寻找UITabBarButton，给UITabBarButton重新设置frame
- (void)layoutSubviews {
    [super layoutSubviews];
    
    if (self.coutn > 0) return;
    self.coutn = 1;
    CGFloat width = 40;
    self.centerTabBarBtn.frame = CGRectMake((ScreenWidth-width)/2, -8, width, width);
    self.titleLabel.frame = CGRectMake(self.centerTabBarBtn.left, self.centerTabBarBtn.bottom+4, width, 10);
    CGFloat tabBarButtonW = ScreenWidth / 5;
    CGFloat tabBarButtonIndex = 0;
    for (UIView *child in self.subviews) {

        Class class = NSClassFromString(@"UITabBarButton");
        if ([child isKindOfClass:class])
        {
            // 重新设置frame
            CGRect frame = CGRectMake(tabBarButtonIndex * tabBarButtonW, 0, tabBarButtonW, 49);
            child.frame = frame;

//            // 增加索引
//            if (tabBarButtonIndex == 1) {
//                tabBarButtonIndex++;
//            }
            tabBarButtonIndex++;
        }
    }
}


////处理超出区域点击无效的问题
//- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
//    if (self.hidden){
//        return [super hitTest:point withEvent:event];
//    }else {
//        //转换坐标
//        CGPoint tempPoint = [self.centerTabBarBtn convertPoint:point fromView:self];
//        //判断点击的点是否在按钮区域内
//        if (CGRectContainsPoint(self.centerTabBarBtn.bounds, tempPoint)){
//            //返回按钮
//            return self.centerTabBarBtn;
//        }else {
//            return [super hitTest:point withEvent:event];
//        }
//    }
//}


- (void)setButtonSelectON:(BOOL)buttonSelectON
{
    _buttonSelectON = buttonSelectON;
    self.centerTabBarBtn.selected = buttonSelectON;
    self.titleLabel.textColor = buttonSelectON ? mainColor : RGB(165, 165, 165);
}

- (void)centerTabBarBtnEvent:(UIButton *)btn
{
    btn.selected = !btn.selected;
    self.titleLabel.textColor = btn.selected ? mainColor : RGB(165, 165, 165);
    if ([self.myTabBarDelegate respondsToSelector:@selector(tabbarClickButton:)])
    {
        [self.myTabBarDelegate tabbarClickButton:2];
    }
    NSLog(@"click event");
}


- (UIButton *)centerTabBarBtn {
    
    if (_centerTabBarBtn == nil) {
        _centerTabBarBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        _centerTabBarBtn.backgroundColor = KKClearColor;
        [self addSubview:_centerTabBarBtn];
        [_centerTabBarBtn setImage:[UIImage imageNamed:@"icon_location"] forState:UIControlStateNormal];
        [_centerTabBarBtn setImage:[UIImage imageNamed:@"icon_location_select"] forState:UIControlStateSelected];
        _centerTabBarBtn.adjustsImageWhenHighlighted = false;
        [_centerTabBarBtn addTarget:self action:@selector(centerTabBarBtnEvent:) forControlEvents:UIControlEventTouchUpInside];
    }
    
    return _centerTabBarBtn;
}

-(UILabel *)titleLabel
{
    if (!_titleLabel)
    {
        _titleLabel = [UILabel new];
        _titleLabel.text = @"定位";
        _titleLabel.font = [UIFont systemFontOfSize:10];
        _titleLabel.textColor = RGB(165, 165, 165);
        _titleLabel.textAlignment = NSTextAlignmentCenter;
        [self addSubview:_titleLabel];
    }
    return _titleLabel;
} 

@end