37、[ iOS ] 底部弹出View

效果如下：

底部弹出View.gif

#define SCREEN_WIDTH         ([[UIScreen mainScreen] bounds].size.width)
#define SCREEN_HEIGHT        ([[UIScreen mainScreen] bounds].size.height)

@property (nonatomic ,strong) UIView *deliverView; //底部View
@property (nonatomic ,strong) UIView *BGView; //遮罩

- (void)appearClick {
 // ------全屏遮罩
    self.BGView                 = [[UIView alloc] init];
    self.BGView.frame           = [[UIScreen mainScreen] bounds];
    self.BGView.tag             = 100;
    self.BGView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.0];
    self.BGView.opaque = NO;
    
    //--UIWindow的优先级最高，Window包含了所有视图，在这之上添加视图，可以保证添加在最上面
    UIWindow *appWindow = [[UIApplication sharedApplication] keyWindow];
    [appWindow addSubview:self.BGView];
    
    // ------给全屏遮罩添加的点击事件
    UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(exitClick)];
    gesture.numberOfTapsRequired = 1;
    gesture.cancelsTouchesInView = NO;
    [self.BGView addGestureRecognizer:gesture];
    
    [UIView animateWithDuration:0.3 animations:^{
       
        self.BGView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.2];
        
    }];
    
    // ------底部弹出的View
    self.deliverView                 = [[UIView alloc] init];
    self.deliverView.frame           = CGRectMake(0, SCREEN_WIDTH, SCREEN_WIDTH, SCREEN_WIDTH);
    self.deliverView.backgroundColor = [UIColor whiteColor];
    [appWindow addSubview:self.deliverView];

    // ------View出现动画
    self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, SCREEN_HEIGHT);
    [UIView animateWithDuration:0.3 animations:^{
       
        self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, 0.01);

    }];
}

/**
 * 功能： View退出
 */
- (void)exitClick {

    NSLog(@"====");
    [UIView animateWithDuration:0.3 animations:^{
        
        self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, SCREEN_HEIGHT);
        self.deliverView.alpha = 0.2;
        self.BGView.alpha = 0;
        
    } completion:^(BOOL finished) {
       
        [self.BGView removeFromSuperview];
        [self.deliverView removeFromSuperview];
    }];

}