Open Radar

 
When using a UITableViewCell which has a backgroundView set, it crashes when trying to use auto layout in iOS 6.  It crashes on both iPhone and iPad simulators.


2012-10-17 13:27:32.387 TestAutoLayout[70680:c07] *** Assertion failure in -[UITableViewCell layoutSublayersOfLayer:], /SourceCache/UIKit_Sim/UIKit-2372/UIView.m:5776
2012-10-17 13:27:32.389 TestAutoLayout[70680:c07] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. UITableViewCell's implementation of -layoutSubviews needs to call super.'


It appears that UITableViewCell's -layoutSubviews method does not call super.  The following category (which can be enabled by changing the "#if 0" to "#if 1" in AppDelegate.m) appears to fix the problem.


@implementation UITableViewCell (FixUITableViewCellAutolayoutIHope)

+ (void)load
{
    Method existing = class_getInstanceMethod(self, @selector(layoutSubviews));
    Method new = class_getInstanceMethod(self, @selector(_autolayout_replacementLayoutSubviews));
    
    method_exchangeImplementations(existing, new);
}

- (void)_autolayout_replacementLayoutSubviews
{
    [super layoutSubviews];
    [self _autolayout_replacementLayoutSubviews]; // not recursive due to method swizzling
    [super layoutSubviews];
}

@end