How to stop UITextView from scrolling up when entering it
Solution 1:
UITextView is a subclass of UIScrollView, so it has a configurable contentInset property. Unfortunately, if you try to change contentInset on a UITextView instance, the bottom edge inset always gets reset to 32. I've run into this before with short UITextView frames and found this to be an issue. I suspect this is what is causing your problem, but you should check the contentInset of your textview in the debugger to be sure.
The workaround/solution is simple: subclass UITextView and override the contentInset method so that it always returns UIEdgeInsetZero. Try this:
//
// BCTextView
//
// UITextView seems to automatically be resetting the contentInset
// bottom margin to 32.0f, causing strange scroll behavior in our small
// textView. Maybe there is a setting for this, but it seems like odd behavior.
// override contentInset to always be zero.
//
@interface BCZeroEdgeTextView : UITextView
@end
@implementation BCZeroEdgeTextView
- (UIEdgeInsets) contentInset { return UIEdgeInsetsZero; }
@end
Solution 2:
This is how UITextView behaves according to Apple's engineer this is intended and UITextView is meant for text that are at least a few lines in height. There is no work around to this, use a UITextField instead or increase your UITextView to at least 3 lines in height.
Solution 3:
You can also just do:
textView.contentInset=UIEdgeInsetsZero;
in your delegate file.