无法移动UIImageView

Question

In an XCode iPad application, I use a storyboard with a view and an UIImageView inside, defined in the Interface Builder. If I try to change the location of the UIImageView using the SetFrame command [myImageView setFrame:CgRectMake...], the image does not change position on the screen. Is the setFrame command enough ? Thanks.

Answer 1

I would go through a checklist and see that the setup is good:

1. Check your IBOutlet - if your UIImageView isn't hooked up, nothing you try calling on it will work.
2. Check the autoresize mask - If this is a non-trivial layout where some views are nested within one another, there might be unexpected results.
3. Make sure you're not using Autolayout - This can be done by selecting the storyboard itself and making sure the "Use Autolayout" checkbox within the file inspector (cmd+alt+1) is not ticked (Ticked by default).

Answer 2

我不确定，但是更改位置后是否需要重绘UIImageView，因为这在编程中经常是这种情况？