UIButton（按钮）

文字按钮

iOS倒计时按钮Button标题闪烁处理
https://blog.csdn.net/u011363981/article/details/76687561
Xcode 13/iOS 15 xib使用UIbutton的问题
https://www.jianshu.com/p/393e60667596
https://blog.csdn.net/same_life/article/details/126787878

@property (nonatomic, strong) UIButton *Btn;

- (UIButton *)Btn {
    if (!_Btn) {
        UIButton *button=[[UIButton alloc]init];
        [button setTitle:@"删除" forState:UIControlStateNormal];
        [button setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
        button.titleLabel.font = systemFont(14);
        button.layer.borderWidth = 0.5;
        button.layer.borderColor = RGB(227, 229, 230).CGColor;
        button.layer.cornerRadius = 3;
        button.layer.masksToBounds = YES;
        [button addTarget:self action:@selector(BtnClick:) forControlEvents:UIControlEventTouchDown];
        
        _Btn = button;
    }
    return _Btn;
}
#pragma mark ************** 按钮被点击
- (void)BtnClick:(UIButton *)sender{
    
}

   [self.Btn makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.view);
        make.height.equalTo(@30);
        make.width.equalTo(@30);
    }];

拓展

#pragma 图片上下左右
 [_btnLeft layoutButtonWithEdgeInsetsStyle:ButtonEdgeInsetsStyleImageLeft imageTitlespace:5];
#pragma 按钮验证码计时器
JKCountDownButton

图片按钮

- (UIButton *)Btn {
    if (!_Btn) {
        UIButton *button = [[UIButton alloc]init];
        [button setImage:[UIImage imageNamed:@"tab_service"] forState:UIControlStateNormal];
        [button.imageView setContentMode:UIViewContentModeScaleAspectFit];
        [button addTarget:self action:@selector(BtnClick:) forControlEvents:UIControlEventTouchDown];
        _Btn = button;
    }
    return _Btn;
}

//按钮按下后的模糊状态
[button setAdjustsImageWhenHighlighted:NO];

问题，IB 中的按钮，在代码中设置上面属性是无效的，得继承（MJHighlightedButton）

按钮设置adjustsImageWhenHighlighted无效
https://www.jianshu.com/p/da57449ad89d

 UIButton *button=[[UIButton alloc]init];
    button.frame = CGRectMake(40, 40, 100, 40);
    [button setTitle:@"childVC" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blackColor] forState:0];
    [button addTarget:self action:@selector(BtnClick:) forControlEvents:UIControlEventTouchDown];
    [self.view addSubview:button];

UIEdgeInsetsMake的使用 网址
http://blog.csdn.net/nlforever/article/details/12967371
http://www.jianshu.com/p/be4543ad4960
https://www.jianshu.com/p/64ab3cdafe89

iOS-UIButton 统计整个App 每个按钮的点击次数
https://www.jianshu.com/p/5e3b4d66ef29