ios - UIView 动画不起作用

Question

我想让 myView 上的 settingView 显示并随着动画消失。
我调用 -showSettingView
if (!self.settingView) :动画正常工作。
但是，else if (self.myView) : settingView 在没有动画的情况下消失。
如何修复它，使 settingView 随动画一起消失？

@property (nonatomic, strong) UIView *myView;
@property (nonatomic, strong) UIView *settingView;

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIBarButtonItem* settingButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(showSettingView)];
    self.navigationItem.rightBarButtonItem = settingButton;
}

- (void)showSettingView
{
    self.myView = [[UIView alloc]initWithFrame:CGRectMake(0, 568, 320, 480)];
    self.myView.opaque = NO;
    self.myView.backgroundColor = [UIColor colorWithWhite:1.0f alpha:0.0f];
    [self.view addSubview:self.myView];

    if (!self.settingView) {
        self.settingView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 568)];
        self.settingView.backgroundColor = [UIColor blackColor];
        [self.myView addSubview:self.settingView];
        [UIView animateWithDuration:0.3f
                              delay:0.0f
                            options:UIViewAnimationOptionTransitionFlipFromBottom
                         animations:^{self.myView.frame = CGRectMake(0, 60, 320, 480);}
                         completion:^(BOOL finished) {}
         ];
    } else if (self.myView){
        self.myView.frame = CGRectMake(0, 60, 320, 480);
        [UIView animateWithDuration:0.3f
                              delay:0.0f
                            options:UIViewAnimationOptionCurveEaseIn
                         animations:^{self.myView.frame = CGRectMake(0, 568, 320, 480);}
                         completion:^(BOOL finished) {}
         ];
        [self.settingView removeFromSuperview];
        self.settingView = nil;
        [self.myView removeFromSuperview];
    }
}

谢谢。

Answer 1

您在动画开始之前释放设置 View 。试试这个:

[UIView animateWithDuration:0.3f
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseIn
                     animations:^{self.myView.frame = CGRectMake(0, 568, 320, 480);}
                     completion:^(BOOL finished) {
                        [self.settingView removeFromSuperview];
                        self.settingView = nil;
                        [self.myView removeFromSuperview];
                     }
     ];

*此外:如果您使用自动布局，则需要执行以下选项之一:

一个。在 block 之前设置 myView 的约束而不是框架，然后在 block 内调用 only layoutIfNeeded:。

B.在动画 block 中设置 transform 属性。