Question

我正试图在不同的位置为相同的图像制作动画，如下所示：

    for (int i = 0; i == 3; i++) {

        UIImageView *imageToAnimate = [[UIImageView alloc] initWithFrame: imageFrameTwo];

        [imageToAnimate setImage: [UIImage imageNamed: imageTwo]];

        CGPoint point0 = imageTwoImage.layer.position;
        CGPoint point1 = { point0.x + 10*i, point0.y - 10*i +  50};

        CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"position.y"];
        anim.fromValue  = @(point0.y);
        anim.toValue    = @(point1.y);
        anim.duration   = 15.0f;
        anim.repeatCount = HUGE_VALF;
        anim.cumulative  = NO;
        anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

        // First we update the model layer's property.
        imageToAnimate.layer.position = point1;

        // Now we attach the animation.
        [imageToAnimate.layer  addAnimation:anim forKey:@"position.y"];
        [theView addSubview:imageToAnimate];
    }

但没有任何反应。没有循环它运作良好。我做错了吗？

Answer 1

[UIView animateWithDuration:DURATION delay:DELAY options:YOUR_UIViewAnimation animations:^(void)

这应该可以解决问题;）

Answer 2

我不会详细介绍，但您可以尝试使用动画块。 0和100是原点。此外，请确保您没有使用autoLayout，您应该禁用它，或者使用自动布局约束而不是帧更改来设置动画。

[UIView animateWithDuration:0.3 
                      delay:1 
                    options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionBeginFromCurrentState                                 
                  animations:^ {

//[yourView setFrame:CGRectMake(0,100,yourView.frame.size.width,yourView.frame.size.height )];
[yourView setFrame:CGRectMake(yourView.frame.origin.x + 100,100,yourView.frame.size.width,yourView.frame.size.height )];


                                }
                  completion:^ (BOOL finished) {

                            }] ;

例如，要在x轴上设置动画，您只需要在

中使用不同的x值

CGRectMake ( <desired x value here>, y, ....)

动画块内的线条现在应将视图向右滑动100像素。

基本动画一些图像

2 个答案: