UIView高度在iPhone 5上不正确 [英] UIView height is not right on iPhone 5

问题描述

我正在一次又一次地使用UIPickerView迁移我的应用程序.在viewDidLoad方法中，我创建选择器并将其y原点设置为self.view.frame.size.height，使其不在屏幕上.然后我只在需要时将其向上移动.

I am migrating my apps over and on one I use a UIPickerView. In the viewDidLoad method I create the picker and set it's y origin to be self.view.frame.size.height so that it is off screen. Then I just move it up when needed.

在iPhone 5上，self.view.frame.size.height仍返回480，但UIView正确填充屏幕.

On the iPhone 5 self.view.frame.size.height is still returning 480 yet the UIView fills the screen correctly.

我什至尝试使用CGRectGetHeight(self.view.bounds)认为它可能会返回不同的结果……没有骰子.关于为什么会发生这种情况的任何想法.

I've even tried using CGRectGetHeight(self.view.bounds) thinking that it may return something different...no dice. Any ideas as to why this maybe occurring.

推荐答案

这是因为在viewWillAppear: (BOOL) animated方法之前，将使用在视图的笔尖中选择的大小.然后它将采用正确的大小.

That is because the size you selected in the view's nib will be used until viewWillAppear: (BOOL) animated method. Then it will take the correct size.

但是，由于调用了viewDidLoad，因此您可以使用以下代码来具有正确的大小:

However you can use the following code to have the correct size since viewDidLoad is called:

CGSize viewSize = [[UIScreen mainScreen] bounds].size;
viewSize = CGSizeMake(viewSize.width, viewSize.height - STATUS_BAR_HEIGHT);

STATUS_BAR_HEIGHT是20，但这取决于您的应用程序.您可能需要也可能不需要添加该行.

STATUS_BAR_HEIGHT is 20 but it depends on your app. You may or may not need to add that line.

编辑

使用mainScreen边界的问题是，框架在方向改变时不会改变.这就是它的设计方式.您可以使用以下方法解决此问题:

The problem with using mainScreen bounds is that the frame doesn't change on orientation change. That is the way it is designed. You can work it out with the following:

    CGSize viewSize = [[UIScreen mainScreen] bounds].size;

    if(UIInterfaceOrientationIsLandscape(CURRENT_ORIENTATION)){
        viewSize = CGSizeMake(viewSize.height, viewSize.width - STATUS_BAR_HEIGHT);

    } else {
        viewSize = CGSizeMake(viewSize.width, viewSize.height - STATUS_BAR_HEIGHT);
    }

CURRENT_ORIENTATION是[[UIApplication sharedApplication] statusBarOrientation];

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