页面上移解决文本框被键盘弹出挡住的问题代码,ObjC代码库,德仔网

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【ObjC】页面上移解决文本框被键盘弹出挡住的问题

作者:请叫我汪海 / 发布于2014/4/8/ 2277

页面上移解决文本框被键盘弹出挡住的问题

//textfield的函数
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
  [username_text resignFirstResponder];
  [password_text resignFirstResponder];
  // When the user presses return, take focus away from the text field so that the keyboard is dismissed.
  NSTimeInterval animationDuration = 0.30f;
  [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
  [UIView setAnimationDuration:animationDuration];
  CGRect rect = CGRectMake(0.0f, 0.0f, self.view.frame.size.width, self.view.frame.size.height);
  self.view.frame = rect;
  [UIView commitAnimations];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
  // When the user presses return, take focus away from the text field so that the keyboard is dismissed.
  NSTimeInterval animationDuration = 0.30f;
  [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
  [UIView setAnimationDuration:animationDuration];
  CGRect rect = CGRectMake(0.0f, 0.0f, self.view.frame.size.width, self.view.frame.size.height);
  self.view.frame = rect;
  [UIView commitAnimations];
  [textField resignFirstResponder];
  return YES;
}


- (void)textFieldDidBeginEditing:(UITextField *)textField
{
  CGRect frame = password_text.frame;
  int offset = frame.origin.y + 32 - (self.view.frame.size.height - 216.0);//键盘高度216
  NSTimeInterval animationDuration = 0.30f;
  [UIView beginAnimations:@"ResizeForKeyBoard" context:nil];
  [UIView setAnimationDuration:animationDuration];
  float width = self.view.frame.size.width;
  float height = self.view.frame.size.height;
  if(offset > 0)
  {
    CGRect rect = CGRectMake(0.0f, -offset,width,height);
    self.view.frame = rect;
  }
  [UIView commitAnimations];
}

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