iOS 7 addSubview为我的UIView添加了额外的长度，这是为什么？

Question

Within my app I have a view controller within a window that adds some subviews when they are required. All the subviews appear using IBActions and the following code:

[self.view addSubview:myViewIWantToAdd];

All of them appear with the correct dimensions and positioning apart from one view. The method seems to add an additional 20 pixels to the length on the view attempting to be displayed to produce the following effect:

http://i.stack.imgur.com/th11f.png

As you can see from the image that the bottom letter tiles extend below the screen boundary by an extra 20 pixels. I can fix it by reduce the size of the view from height 568 to 548. However in doing so creates a peculiar effect. When the height of the UIView is set at 548 the touchable (user interaction) area also reduces by 20 pixels. This means that users cannot select the bottom half of the bottom letter tiles. At this stage I am pretty lost as I am implementing the UIView just like any other UIView within the app which don't have any problems at all. How can I fix this / what am I doing wrong?

PS I never had this issue in iOS 6, I believe it's something to do with iOS 7.

Answer 1

In ios 7, your window is beneath the status bar , so your window's height will be 20 point higher.

You can adjust the subview's frame and set appropriate autoresizingMask property of view to solve it.

If you want to make your app meet ios7 appearance, see the link

Answer 2

请在您的设备上进行相同的测试。