ScrollViews will not resize - ios

Question

I have struggled with this and maybe I am not understanding how scrollviews work. I am trying to calculate the height automatically for 'self.description' however nothing I do seems to work. I have changed values from the scrollviewframe even tried changing the values using frame.size.height. however it still does not calculate the height. Am i missing something?
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
if (self) {
CGRect scrollViewFrame = CGRectMake(0, 0, 460, 590);
scrollView = [[UIScrollView alloc] initWithFrame:scrollViewFrame];
[self.contentView addSubview:self.scrollView];
[scrollView setCanCancelContentTouches:NO];
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView.clipsToBounds = YES;
scrollView.scrollEnabled = YES;
scrollView.pagingEnabled = NO;
self.label = [[UILabel alloc] initWithFrame:CGRectMake(10.0, 67.0, 290, 50)];
self.label.font= [UIFont fontWithName:#"Helvetica-Bold" size:20];
self.label.textColor = [UIColor colorWithRed:33.0f/255.0f green:74.0f/255.0f blue:146.0f/255.0f alpha:1.0f];
self.label.numberOfLines = 0;
self.label.lineBreakMode = NSLineBreakByWordWrapping;
self.label.backgroundColor = [UIColor whiteColor];
[scrollView addSubview:self.label];
//[self.contentView addSubview:self.label];
self.description = [[UILabel alloc] initWithFrame:CGRectMake(10.0, 380.0, 300, 9999)];
self.description.font= [UIFont fontWithName:#"Helvetica-Light" size:15];
self.description.textColor = [UIColor blackColor];
self.description.textAlignment = NSTextAlignmentJustified;
self.description.numberOfLines = 0;
self.description.lineBreakMode = NSLineBreakByWordWrapping;
self.description.backgroundColor = [UIColor whiteColor];
[scrollView addSubview:self.description];
//[self.contentView addSubview:self.description];
self.image = [[UIImageView alloc] initWithFrame:CGRectMake(20, 130, 280, 228)];
self.image.clipsToBounds = YES;
[scrollView addSubview:self.image];
//[self.contentView addSubview:self.image];
float hgt=0; for (UIView *view in scrollView.subviews) hgt+=view.frame.size.height;
[scrollView setContentSize:CGSizeMake(scrollView.frame.size.width,hgt)];
self.backgroundColor = [UIColor whiteColor];
}
}

Answer 1

Are you trying to resize scrollview or the content size of the scroll?
If you like to resize scrollview, the self.contentView aren't resized and if it is not bigger or equal to scrollview, probably it's your issue.

Answer 2

float contentHeight = 0;
contentHeight = yourLastSubview.frame.origin.x + yourLastSubview.frame.size.height;
[scrollView setContentSize:CGSizeMake(scrollView.frame.size.width,contentHeight)];
//yourLastSubview is for example your self.description, because self.description' origin.y is the largest (380)
If your scrollView.frame.size.height is bigger than contentHeight, your scrollView won't scroll. For example if your scrollView.frame = CGRectMake(0,0,320,480); and your contentHeight is 400 scrollView won't scroll, but if contentHeight = 500; it will.
If you want to enable bouncing your scrollView when the contentHeight is smaller than your scrollView Height use this: scrollView.alwaysBounceVertical = YES;