CALayerInvalidGeometry'，原因：'CALayer bounds contains NaN: [0 0; nan nan] 在视图中崩溃

Question

我对此进行了很多研究，但我似乎只能获得与此问题相关的 webView 和表格。我的完全不同，似乎有相同的崩溃异常：

CALayerInvalidGeometry', reason: 'CALayer bounds contains NaN: [0 0;楠楠]

基本上我这里有一个淡化和缩放图像的视图。我最近决定在 UIView 动画中使用 CGAffineTransformScale 更改我的代码，而不是每次计时器滴答时都将其放大一个档次。这使用更少的处理能力。

但是无论我按什么顺序排列图片，它总是在第 19 张之后崩溃。它所引用的定位坐标数组似乎没有问题，因为它的长度只有 6，并且在达到其长度后循环。因此，由于某种原因，现在我已经实现了这个动画代码，它给了我崩溃。有谁知道为什么？

这是我在崩溃后更改的部分：

-(void) onTimer{

if(scaleTimer_A==5){

    imageView_A.image = [UIImage imageNamed:[attractList_A objectAtIndex:imageIndex_A]];

    imageView_A.frame = CGRectMake(300, 200, 3.86, 3.86);

    imageView_A.center = CGPointMake(attractLocs_x_A[attractLocs_A_index], attractLocs_y_A[attractLocs_A_index]);



    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:2];
    imageView_A.alpha = 1;
    imageView_A.transform = CGAffineTransformScale(imageView_A.transform, 100, 100);
    [UIView commitAnimations]; 
}

if(scaleTimer_A==10){

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:.75];
    imageView_A.alpha = 0;
    imageView_A.transform = CGAffineTransformScale(imageView_A.transform, 1.2, 1.2);
    [UIView commitAnimations]; 

    scaleTimer_A=0;

    imageIndex_A+=1;

    if(imageIndex_A==imageIndex_A_size){
        imageIndex_A=0;
    }

    attractLocs_A_index+=1;

    if(attractLocs_A_index==attractLocs_A_SIZE){
        NSLog(@"Back to zero A");
        attractLocs_A_index=0;
    }
    NSLog(@"Image A =%@", [attractList_A objectAtIndex:imageIndex_A]);
}

scaleTimer_A+=1;}

编辑：

以下是我如何使用 CGAffineTransformIdentity 使上面的代码正常工作而不会出现崩溃问题。

-(void) onTimer{

if(scaleTimer_A==5){

    imageView_A.image = [UIImage imageNamed:[attractList_A objectAtIndex:imageIndex_A]];

    imageView_A.transform = CGAffineTransformIdentity;

    imageView_A.center = CGPointMake(attractLocs_x_A[attractLocs_A_index], attractLocs_y_A[attractLocs_A_index]);



    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:2];
    imageView_A.alpha = 1;
    imageView_A.transform = CGAffineTransformScale(CGAffineTransformIdentity, 100, 100);
    [UIView commitAnimations]; 
}

if(scaleTimer_A==10){

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:.75];
    imageView_A.alpha = 0;
    imageView_A.transform = CGAffineTransformScale(CGAffineTransformIdentity, 120, 120);
    [UIView commitAnimations]; 

    scaleTimer_A=0;

    imageIndex_A+=1;

    if(imageIndex_A==imageIndex_A_size){
        imageIndex_A=0;
    }

    attractLocs_A_index+=1;

    if(attractLocs_A_index==attractLocs_A_SIZE){
        NSLog(@"Back to zero A");
        attractLocs_A_index=0;
    }
    NSLog(@"Image A =%@", [attractList_A objectAtIndex:imageIndex_A]);
}

scaleTimer_A+=1;}

Answer 1

根据堆栈跟踪，问题出在此处

imageView_A.frame = CGRectMake(300, 200, 3.86, 3.86);

尝试将 imageView_A.transform 设置为标识。另一种解决方案（我认为更好）是使用 UIScrollView 进行缩放（也可以制作动画）。

编辑：试试这个

    imageView_A.image = [UIImage imageNamed:[attractList_A objectAtIndex:imageIndex_A]];

    imageView_A.frame = CGRectMake(300, 200, 3.86, 3.86);

    imageView_A.center = CGPointMake(attractLocs_x_A[attractLocs_A_index], attractLocs_y_A[attractLocs_A_index]);



    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:2];
    imageView_A.alpha = 1;
    imageView_A.frame = CGRectMake(300, 200, 386.0f, 386.0f);
    [UIView commitAnimations];