防止输入时键盘覆盖掉textfiled

添加监听者

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardwasChange:) name:UIKeyboardWillChangeFrameNotification object:nil];

监听键盘之后的操作

可以根据自己的需要调整高度的大小

 - (void)keyboardwasChange:(NSNotification *)info

 {

     CGRect keyFrame = [info.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

     CGFloat tY = keyFrame.origin.y - self.view.frame.size.height - ;

     self.view.transform = CGAffineTransformMakeTranslation(, tY);

 }

参考摘自：http://www.cnblogs.com/paocai2015/p/5057039.html