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Stack subviews vertically ordered by their index. Good when u want to use XIB's and need to layout views (show/hide) based on external data, but cannot use autolayout.
#import <UIKit/UIKit.h>
@interface UIView (Stacker)
- (void)stackSubviews;
@end
#import "UIView+Stacker.h"
@implementation UIView (Stacker)
- (void)stackSubviews {
// Init Y position of the first visible subview contained inside the StackerView
float _y = 0;
for (UIView *subview in self.subviews) {
// Start by adjusting the Y position of the current subview
subview.y = _y;
// If the subview is visible, then add height to the global Y position, which is
// used to set the Y position of the next subview in the iteration
if (!subview.hidden) {
// If the subview is a TableView, we use the contentsize instead of the frames height
if ([subview isMemberOfClass:[UITableView class]]) {
UITableView *tview = (UITableView *)subview;
_y += tview.contentSize.height;
} else {
_y += subview.frame.size.height;
}
// Increase the height of acctual StackerView with each visible sub-view
self.height = _y;
}
}
}
@end
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