How to solve the problem of hiding view on the keyboard-iOS development

Original article Excerpted from:Http://blog.csdn.net/iukey/article/details/7242488

By default, opening the keyboard will cover the view below, which brings a little trouble. However, this is not a big problem. We can solve it with a few small means.

First, we need to know that the keyboard height is fixed, but after IOS 5.0, the keyboard height does not seem to be 216, but it doesn't matter. We just need to adjust it:

	IPhone	IPad
Portrait screen (portrait)	216	264
Landscape)	140	352

The method we take is to move self. view up 216px as a whole when textfield (possibly another control) receives a pop-up keyboard event (we will take the iPhone portrait screen as an example ).

For details about frame, origin, size, and other aspects of a view, see another blog: <several basic knowledge points about the View>

First, we need to set the textfield proxy to the current controller.

Textfield, delegate = self;

Then we implement the following three delegate methods in the current controller:

[Java]View plaincopyprint?

2. -(Void) Textfielddidbeginediting :( uitextfield *) textfield
4. {// This method is called when you click inside textfield to start editing. Textfield will become first responder
6. Nstimeinterval animationduration = 0.30f;
8. Cgrect frame = self. View. frame;
10. Frame. Origin. Y-= 216;
12. Frame. Size. Size + = 216;
14. Self. View. Frame = frame;
16. [Uiview beginanimations: @ "resizeview" context: Nil];
18. [Uiview setanimationduration: animationduration];
20. Self. View. Frame = frame;
22. [Uiview commitanimations];
24. }

[Java]View plaincopyprint?

2. -(Bool) textfieldshouldreturn :( uitextfield *) textfield
4. {// When the user presses ruturn and removes the focus from textfield, the keyboard disappears.
6. Nstimeinterval animationduration = 0.30f;
8. Cgrect frame = self. View. frame;
10. Frame. origins. Y + = 216;
12. Frame. Size. Height = 216;
14. Self. View. Frame = frame;
16. // Self. View
18. [Uiview beginanimations: @ "resizeview" context: Nil];
20. [Uiview setanimationduration: animationduration];
22. Self. View. Frame = frame;
24. [Uiview commitanimations];
26. [Textfield resignfirstresponder];
28. }