UITextField不响应键盘：
方法1。TextField的的Touch Cancel响应中，添加[textFied resignFirstResponder];
方法2。- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
[textFied resignFirstResponder]; }
更改响应键盘return按钮：
TextField.returnKeyType=UIReturnKeyDone;
UIReturnKeyDefault,
UIReturnKeyGo,
UIReturnKeyGoogle,
UIReturnKeyJoin,
UIReturnKeyNext,
UIReturnKeyRoute,
UIReturnKeySearch,
UIReturnKeySend,
UIReturnKeyYahoo,
UIReturnKeyDone,
UIReturnKeyEmergencyCall,