iOS解決鍵盤遮擋輸入框的問題

-(void)textFieldDidBeginEditing:(UITextField *)textField{
  CGRect frame = textField.frame;
  int offset = frame.origin.y + 100 - (UISCREEN_HEIGHT - 480.0);//鍵盤高度
  NSTimeInterval animationDuration = 0.30f;
  [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
  [UIView setAnimationDuration:animationDuration];
  
  //將視圖的Y座標向上移動offset個單位，以使下面騰出地方用於軟鍵盤的顯示
  if(offset > 0)
    self.view.frame = CGRectMake(0.0f, -offset, UISCREEN_WIDTH, UISCREEN_HEIGHT);
  [UIView commitAnimations];
}

-(BOOL)textFieldShouldReturn:(UITextField *)textField {//按“完成”隱藏鍵盤
  [textField resignFirstResponder];//隱藏輸入鍵盤
  return YES;
}

//輸入框編輯完成以後，將視圖恢復到原始狀態
-(void)textFieldDidEndEditing:(UITextField *)textField{
  self.view.frame = CGRectMake(0, 0, UISCREEN_WIDTH, UISCREEN_HEIGHT);
}