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UIscrollview resize problem
CGRect scrollframe = scrollView.frame;
    NSLog(@"scrollframe.height=%f, pick height=%f",scrollframe.size.height, pick.frame.size.height);
    scrollframe.size.height -= pick.frame.size.height;
    [UIView beginAnimations:@"start" context:NULL];
    [UIView setAnimationDuration:0.2];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [scrollView setFrame:scrollframe];
    NSLog(@"scroll height = %f",scrollframe.size.height);
    NSLog(@"scrollview height = %f", scrollView.frame.size.height);
    [pick setFrame:CGRectOffset([pick frame], 0, -220)];
    [UIView commitAnimations];

[scrollframe setContentOffset:CGPointMake(scrollframe.contentOffset.x, scrollframe.contentOffset.y-100)];

UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[contentView setBackgroundColor:[UIColor clearColor]];
self.view = contentView;

UIScrollView *horizontalScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[horizontalScroll setBackgroundColor:[UIColor blackColor]];
[horizontalScroll setDelegate:self];
[contentView addSubview:horizontalScroll];

UIPickerView *tempPicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 220, 320, 100)];
[tempPicker setHidden:YES];
[contentView addSubview:tempPicker];