iPhone/iPad - 核心动画 - CGAffineTransformMakeTranslation 不会修改框架

发布于 2024-12-22 10:34:09 字数 959 浏览 2 评论 0原文

我面临着一个非常烦人的问题。这是上下文：我有一个“矩形”视图，它是主视图的子视图。我想做的很简单，当我单击按钮时，我希望“矩形”视图在 x 轴上平移以便消失。然后，我添加一个新的子视图并对其进行翻译，以取代之前的“矩形”视图。它工作正常，只是如果我再次按下按钮，动画将从屏幕上开始，就像 CGAffineTransformMakeTranslation 没有更改我的新“矩形”视图的框架一样。这是代码：

UIView *rectangleView = [detailView viewWithTag:4]; //the actual frame is (20.0, 30.0, 884.0, 600.0)

[UIView animateWithDuration:0.5 animations:^{
    [rectangleView setTransform:CGAffineTransformMakeTranslation(-1000, 0)];
} completion:^(BOOL finished) {
    [rectangleView removeFromSuperview];
    UIView *otherView = [[UIView alloc] initWithFrame:CGRectMake(1020.0, 30.0, 884.0, 600.0)];
    [otherView setBackgroundColor:[UIColor purpleColor]];
    [otherView setTag:4];
    [detailView addSubview:otherView];
    [UIView animateWithDuration:0.5 animations:^{
        [otherView setTransform:CGAffineTransformMakeTranslation(-1000, 0)];
    } completion:^(BOOL finished) {
        [otherView release];
    }];
}];

原文

I'm facing a very annoying problem.
Here's the context : I have a "rectangle" view which is the subview of the main view.
What i'm trying to do is simple, when I click on a button, I want the "rectangle" view to translate on the x-axis in order to disappear. I then add a new subview and translate it in order to take the place of the previous "rectangle" view.
It's work fine except that if I press the button again, the animation will begin off the screen, like the CGAffineTransformMakeTranslation didn't change the frame of my new "rectangle" view.
Here's the code :

UIView *rectangleView = [detailView viewWithTag:4]; //the actual frame is (20.0, 30.0, 884.0, 600.0)

[UIView animateWithDuration:0.5 animations:^{
    [rectangleView setTransform:CGAffineTransformMakeTranslation(-1000, 0)];
} completion:^(BOOL finished) {
    [rectangleView removeFromSuperview];
    UIView *otherView = [[UIView alloc] initWithFrame:CGRectMake(1020.0, 30.0, 884.0, 600.0)];
    [otherView setBackgroundColor:[UIColor purpleColor]];
    [otherView setTag:4];
    [detailView addSubview:otherView];
    [UIView animateWithDuration:0.5 animations:^{
        [otherView setTransform:CGAffineTransformMakeTranslation(-1000, 0)];
    } completion:^(BOOL finished) {
        [otherView release];
    }];
}];

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￠好甜 2024-12-29 10:34:09

添加第二个视图后，您已经将其变换设置为等于CGAffineTransformMakeTranslation(-1000, 0)，并且当您想要删除该视图时，您设置了完全相同的变换 - 因此它将没有影响。这里有 2 个选项：

将翻译应用于视图已有的转换：

CGAffineTransform newTransform = CGAffineTransformConcat(rectangleView.transform, CGAffineTransformMakeTranslation(-1000, 0));
[rectangleView setTransform:newTransform];

不直接应用视图位置操作变换（例如通过其 center 属性）

UIView *rectangleView = [detailView viewWithTag:4]; //实际帧是(20.0, 30.0, 884.0, 600.0)
CGAffineTransform tf = CGAffineTransformMakeTranslation(-1000, 0);
[UIView animateWithDuration:0.5 动画:^{
    [矩形视图setCenter：CGPointApplyAffineTransform（矩形视图.center，tf）];
} 完成:^(BOOL 完成) {
    [矩形视图从超级视图中删除];
    UIView *otherView = [[UIView alloc] initWithFrame:CGRectMake(1020.0, 30.0, 884.0, 600.0)];
    [otherView setBackgroundColor:[UIColor PurpleColor]];
    [其他视图设置标签：4]；
    [detailView addSubview:otherView];
    [UIView animateWithDuration:0.5 动画:^{
        [otherView setCenter: CGPointApplyAffineTransform(otherView.center, tf)];
    } 完成:^(BOOL 完成) {
        [其他查看发布]；
    }];
}];

After your second view is added you already set its transform to be equal to CGAffineTransformMakeTranslation(-1000, 0), and when you want to remove that view you set exactly the same transform - so it will have no effect. You have 2 options here:

Apply translation to the transform the view already has:

CGAffineTransform newTransform = CGAffineTransformConcat(rectangleView.transform, CGAffineTransformMakeTranslation(-1000, 0));
[rectangleView setTransform:newTransform];

Instead of applying transforms operate with view position directly (e.g. via its center property)

UIView *rectangleView = [detailView viewWithTag:4]; //the actual frame is (20.0, 30.0, 884.0, 600.0)
CGAffineTransform tf = CGAffineTransformMakeTranslation(-1000, 0);
[UIView animateWithDuration:0.5 animations:^{
    [rectangleView setCenter: CGPointApplyAffineTransform(rectangleView.center, tf)];
} completion:^(BOOL finished) {
    [rectangleView removeFromSuperview];
    UIView *otherView = [[UIView alloc] initWithFrame:CGRectMake(1020.0, 30.0, 884.0, 600.0)];
    [otherView setBackgroundColor:[UIColor purpleColor]];
    [otherView setTag:4];
    [detailView addSubview:otherView];
    [UIView animateWithDuration:0.5 animations:^{
        [otherView setCenter: CGPointApplyAffineTransform(otherView.center, tf)];
    } completion:^(BOOL finished) {
        [otherView release];
    }];
}];

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