iPhone开发 当输入的键盘会挡住UITextField的处理事件

新的方式：

- (IBAction)textFieldDidBeginEditing:(UITextField *)textField {
    activeText = textField;
    [self slideFrame:YES];
}

- (IBAction)textFieldDidEndEditing:(UITextField *)textField {
    activeText = nil;
    [self slideFrame:NO];
}
-(void) slideFrame:(BOOL) up
{    
    int movementDistance = 0; // tweak as needed
    const float movementDuration = 0.3f; // tweak as needed
    
    int actSelfHeight=activeText.frame.origin.y;
    if(actSelfHeight>180)
    {
        movementDistance=actSelfHeight-160;
        downNum=movementDistance;
    }
    
    int movement = (up ? -movementDistance: downNum);
    
    [UIView beginAnimations: @"anim" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    self.view.frame = CGRectOffset(self.view.frame, 0, movement);
    [UIView commitAnimations];
}

 

//添加键盘的监听事件

[[NSNotificationCenterdefaultCenter] addObserver:selfselector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotificationobject:nil];

 

//

- (IBAction)textFieldDidBeginEditing:(UITextField *)textField {

    activeText = textField;

}

 

- (IBAction)textFieldDidEndEditing:(UITextField *)textField {

    activeText = nil;

}

 

 

#pragma mark 滚动scrollview 使被隐藏的textfield显示在屏幕正确的位置（软键盘的上方）

- (void)keyboardWasShown:(NSNotification*)aNotification {

NSDictionary* info = [aNotification userInfo];

    //键盘的大小

    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    CGRect aRect = self.view.frame;

    aRect.size.height -= kbSize.height;

// 输入项区域被认为定高

CGPoint activeFieldRect = activeText.frame.origin;

    int actHeight=activeFieldRect.y;

    int actSelfHeight=activeText.frame.size.height;

if(aRect.size.height-actHeight-actSelfHeight<0)

    {

        CGPoint scrollPoint = CGPointMake(0.0, -(aRect.size.height-actSelfHeight-actHeight));

        [scView setContentOffset:scrollPoint animated:YES];

    }

}