IOS 键盘挡住输入框的问题解决办法

[textfield addTarget:self action:@selector(textFieldDidBeginEditing:) forControlEvents:UIControlEventEditingDidBegin]; 
[textfield addTarget:self action:@selector(textFieldDidEndEditing:) forControlEvents:UIControlEventEditingDidEnd]; 

-(void)textFieldDidBeginEditing:(UITextField *)textField{  //开始编辑时，整体上移 
  if (textField.tag==0) { 
    [self moveView:-20]; 
  } 
  if (textField.tag==1) 
  { 
    [self moveView:-60]; 
  } 
} 
-(void)textFieldDidEndEditing:(UITextField *)textField{   //结束编辑时，整体下移 
  if (textField.tag==0) { 
    [self moveView:20]; 
  } 
  if (textField.tag==1) 
  { 
    [self moveView:60]; 
  } 
} 
-(void)moveView:(float)move{ 
  NSTimeInterval animationDuration = 0.30f; 
  CGRect frame = self.view.frame; 
  frame.origin.x +=move;//view的X轴上移 
  self.view.frame = frame; 
  [UIView beginAnimations:@"ResizeView" context:nil]; 
  [UIView setAnimationDuration:animationDuration]; 
  self.view.frame = frame; 
  [UIView commitAnimations];//设置调整界面的动画效果 
 
 
}