Question

我试图将UILabel帧设置为屏幕中间位置的动画。相反，它似乎是从视图之外的某个地方动画回到其原始位置。

[UIView beginAnimations:@"labelAnim" context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve: UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1.0];
[self.scoreLabel setFrame:self.endScoreFrame];
[UIView commitAnimations];

以下是起始帧和结束帧：

Start Frame: {{10, 30}, {144, 21}}
Final Frame: {{93.75, 158.71438598632812}, {187.5, 46.875}}

Answer 1

试试此代码

[UIView animateWithDuration:1.0
                          delay:0.0
                        options:UIViewAnimationCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         [self.scoreLabel setFrame:self.endScoreFrame];
                     } completion:^(BOOL finished) {
                         NSlog("completed");
                     }];

并确保您的endScoreFrame具有正确的新位置坐标：

  NSLog(@"%@", NSStringFromCGRect(self.endScoreFrame));

我已经使用旧框架和新框架的值测试了此代码，并且工作正常：

@property (nonatomic, strong) UILabel *lbl;

viewDidLoad中：

self.lbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 144, 21)];
self.lbl.text = @"mylabel";

[self.view addSubview:self.lbl] ;

行动

-(void)btnClick:(id)sender
{ 

    CGRect newFrame = CGRectMake(93.75, 158.71438598632812, 187.5, 46.875);


    [UIView animateWithDuration:1.0
                          delay:0.0
                        options:UIViewAnimationCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.lbl.frame = newFrame ;
                     } completion:^(BOOL finished) {

                     }];

}

Answer 2

我发现了问题。我忘记了我在Interface Builder中设置了标签，因此它被覆盖了。

uilabel动画到原始位置

2 个答案: