使用 CABasicAnimation iPhone 启动和停止动画

发布于 2024-11-03 21:21:50 字数 567 浏览 0 评论 0原文

我想对图像使用动画，在单击按钮时启动并在 5 秒后停止。我使用此代码。

-(IBAction) btnClicked
{   
    CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
    fullRotation.duration = 6;
    fullRotation.repeatCount = 1e100f;
    fullRotation.delegate = self;
    [imgView.layer addAnimation:fullRotation forKey:@"360"];
    [imgView.layer setSpeed:3.0];
}

使用此代码动画已启动，但我不知道如何在 5 秒后停止此动画。

原文

I want to use animation for image, start on button clicked and stop after 5 seconds.I use this code.

-(IBAction) btnClicked
{   
    CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
    fullRotation.duration = 6;
    fullRotation.repeatCount = 1e100f;
    fullRotation.delegate = self;
    [imgView.layer addAnimation:fullRotation forKey:@"360"];
    [imgView.layer setSpeed:3.0];
}

with this code animation is started but i don't know how to stop this animation after 5 seconds.

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紅太極 2024-11-10 21:21:50

甚至不处理 CoreAnimation。我认为这可以通过 UIView 动画来实现，它更容易编程。查看 UIView 文档并尝试块动画（假设 iOS 4.0。如果没有，请使用旧样式）。

看看此处有关 UIView 动画的文档。设置 transform 属性以使用 CGAffineTransformMakeRotation 进行旋转。

这是一个基于 UIView 的动画旋转：

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIView *viewToAnimate = [[[UIView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)] autorelease];
    viewToAnimate.backgroundColor = [UIColor blueColor];
    [self.view addSubview:viewToAnimate];
    [UIView animateWithDuration:5 animations:^{
        viewToAnimate.transform=CGAffineTransformMakeRotation(M_PI);
    }];
}

Don't even deal with CoreAnimation. I think this can be do this with UIView animations, which are easier to program. Look at UIView documentation and try the block animations (assuming iOS 4.0. if not, use older style).

Look here for the docs on UIView animations. Set the transform property to do the rotation using CGAffineTransformMakeRotation.

Here is a UIView based animated rotation:

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIView *viewToAnimate = [[[UIView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)] autorelease];
    viewToAnimate.backgroundColor = [UIColor blueColor];
    [self.view addSubview:viewToAnimate];
    [UIView animateWithDuration:5 animations:^{
        viewToAnimate.transform=CGAffineTransformMakeRotation(M_PI);
    }];
}

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