I'm adding subViews to a programmatically added UIScrollView, yet when the subViews go off the screen the scrollview isn't scrolling. Any Ideas?
I need to update the content size of the scrollview more than once.
First I add the scrollView itself as subView of the view, like so:
[super viewDidLoad];
[self addScrollView];
[self APISimpleDemo];
}
#pragma mark Add Scroll View
-(void)addScrollView {
//Add Scroll View
CGFloat navHeight = self.navigationController.navigationBar.frame.size.height; //get height of nav bar
CGRect scrollFrame;
scrollFrame.size.height = self.view.frame.size.height - (navHeight - 150); //set height minus nav bar and top section
scrollFrame.size.width = self.view.frame.size.width;
scrollFrame.origin.y = 180;
scrollFrame.origin.x = 0;
self.scrollView = [[UIScrollView alloc] initWithFrame:scrollFrame];
NSLog(@"TableView Frame %@", NSStringFromCGRect(scrollFrame));
self.scrollView.delegate = self;
[self.view addSubview:self.scrollView];
}
The NSLog output is: {{0, 180}, {375, 773}}
Next the code runs through and the end of each test (in this example 2) a tableView is added to the newly added scrollView. Like so...
-(void)addSpeedTable {
CGRect frame = self.tableView.frame;
frame.size.height = (40 * resultHeadings.count)+35;
frame.size.width = self.view.frame.size.width;
//If more than one table has been shown increase Y axis height for view
if(tablesDisplayed > 0) {
NSLog(@"Tables displayed greater than zero");
viewHeight = viewHeight + frame.size.height;
}
frame.origin.y = viewHeight;
frame.origin.x = 0;
self.tableView = [[UITableView alloc] initWithFrame:frame];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"newCell"];
self.tableView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
self.tableView.rowHeight = 40;
self.tableView.sectionFooterHeight = 0;
self.tableView.sectionHeaderHeight = 22;
self.tableView.scrollEnabled = NO; // Disable ScrollView
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.tableView = _tableView;
NSLog(@"TableView Frame %@", NSStringFromCGRect(frame));
[self.scrollView addSubview:self.tableView];
tablesDisplayed++;
}
As I needed the content size of the scrollView to increase as TableViews were added to the ScrollView I created a method that updates the scrollView content size every time a table is added:
The code now looks like:
-(void)addScrollView {
//Add Scroll View
CGFloat navHeight = self.navigationController.navigationBar.frame.size.height; //get height of nav bar
CGRect scrollFrame;
scrollFrame.size.height = self.view.frame.size.height - navHeight - 150; //set height minus nav bar and top section
scrollFrame.size.width = self.view.frame.size.width;
scrollFrame.origin.y = 180;
scrollFrame.origin.x = 0;
self.scrollView = [[UIScrollView alloc] initWithFrame:scrollFrame];
self.scrollView.delegate = self;
[self.view addSubview:self.scrollView];
}
#pragma mark Update Scroll View Content Size
-(void)updateScrollSize {
//View height is set in the add table method depending on the size of the table
CGFloat scrollHeight = 400 + viewHeight;
self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, scrollHeight);
}
-(void)addSpeedTable {
CGRect frame = self.tableView.frame;
frame.size.height = (40 * resultHeadings.count)+50;
frame.size.width = self.view.frame.size.width;
//If more than one table has been shown increase Y axis height for view
if(tablesDisplayed > 0) {
NSLog(@"Tables displayed greater than zero");
viewHeight = viewHeight + frame.size.height;
}
frame.origin.y = viewHeight;
frame.origin.x = 0;
[self updateScrollSize]; //Update scrollView contentSize when adding new table to view
self.tableView = [[UITableView alloc] initWithFrame:frame];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"newCell"];
self.tableView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
self.tableView.rowHeight = 40;
self.tableView.sectionFooterHeight = 0;
self.tableView.sectionHeaderHeight = 22;
self.tableView.scrollEnabled = NO; // Disable ScrollView
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.tableView = _tableView;
NSLog(@"TableView Frame %@", NSStringFromCGRect(frame));
[self.scrollView addSubview:self.tableView];
tablesDisplayed++;
}
