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是否可以成功设置移动按钮的动画?

uibutton core-animation animation objective-c iphone

Smikey · 技术社区 · 14 年前

[UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:5.0];
    CGAffineTransform newTransform = CGAffineTransformMakeScale(3, 3);
    bubble.transform = CGAffineTransformTranslate(newTransform, 0, -460);
    [UIView commitAnimations];

因此,我在一些示例代码的帮助下尝试了核心动画(路径并不重要,只是一个示例):

CGMutablePathRef thePath = CGPathCreateMutable();
    CGPathMoveToPoint(thePath,NULL,15.0f,15.f);
    CGPathAddCurveToPoint(thePath,NULL,
                          15.f,250.0f,
                          295.0f,250.0f,
                          295.0f,15.0f);
    CAKeyframeAnimation *theAnimation=[CAKeyframeAnimation animationWithKeyPath:@"position"];
    theAnimation.path=thePath;
    CAAnimationGroup *theGroup = [CAAnimationGroup animation];
    theGroup.animations=[NSArray arrayWithObject:theAnimation];
    theGroup.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
    theGroup.duration=15.0;
    CFRelease(thePath);
    [bubble.layer addAnimation:theGroup forKey:@"animatePosition"];

有人能建议另一种方法吗?我是否应该为UIImageViews设置动画,并使其重新显示以进行触摸?还是我会有同样的问题?这让我困惑了好几天,所以非常感谢您的帮助。

谢谢:)

迈克尔

4 回复 | 直到 14 年前

Engin Kurutepe mick80234 14 年前

对于UIKit和CoreAnimation来说,这听起来有点太复杂了。你好像在开发一个游戏。为什么不使用一个全局动画定时器,比如说~60 fps,然后用Quartz2D绘制呢?然后,对于每次触摸,您可以快速检查石英刷新之间的任何点击。

Tim Rupe 14 年前

当设置GUI元素(如UIButton)的动画时,实际位置仅在动画完成时更改。这意味着动画期间的任何触摸事件将仅在按钮的起始点起作用。您可以通过访问按钮的presentationLayer来获取按钮的当前显示位置。您可能需要实现自己的事件处理,查看用户触摸屏幕时的位置,并将其与从presentationLayer获得的边界进行比较。

Smikey 14 年前

- (void)startMinigame {
    makeBubbles = [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(generateRandomBubble) userInfo:nil repeats:YES];
    floatBubbles = [NSTimer scheduledTimerWithTimeInterval:1.0/60.0 target:self selector:@selector(floatBubbles) userInfo:nil repeats:YES];
}

- (void)generateRandomBubble {
    //Get a random image for the bubble
    int randomIndex = arc4random()%kNumberBubbles;
    UIImage *bubbleImage = [bubbleImages objectAtIndex:randomIndex];

    //Create a new bubble object and retrieve the UIButton
    Bubble *bubble = [[Bubble alloc]initWithImage:bubbleImage andIndex:randomIndex];
    UIButton *bubbleButton = bubble.bubbleButton;

    //Configure the button
    [bubbleButton addTarget:self action:@selector(bubbleBurst:) forControlEvents:UIControlEventTouchDown];

    //Add the bubble to the scene
    [self.view insertSubview:bubbleButton belowSubview:bathTub];
    //Add the bubble to an array of currently active bubbles:
    [self.bubbles addObject:bubble];
    [bubble release];
}

- (void)floatBubbles {
    //Move every active bubble's frame according to its speed. 
    for (int i = 0; i < [bubbles count]; ++i) {
        Bubble *bubble = [bubbles objectAtIndex:i];
        int bubbleSpeed = bubble.speed;
        CGRect oldFrame = bubble.bubbleButton.frame;
        CGRect newFrame = CGRectMake(oldFrame.origin.x, oldFrame.origin.y - bubbleSpeed, oldFrame.size.width+0.1, oldFrame.size.height+0.1);
        bubble.bubbleButton.frame = newFrame;
        if (bubble.bubbleButton.frame.origin.y < -100.0) {
            [bubbles removeObject:bubble];
            [bubble.bubbleButton removeFromSuperview];
        }
    }
}

tadejsv 14 年前

尝试设置uiview的frame属性的动画。