How to access view's subviews without crash while hooking Swift? (Jailbreak) - objective-c

Question

I have an odd issue where when I change the background of a view, I can no longer see the UILabels that are subviews of that view. I cannot dump the headers for the Calculator app, as it is in Swift, and I don't know what the name of the UILabels are, and FLEXing is no help with that. I want to bring the subviews in front of the background view (there are two subviews), but both of my current methods crash the target app. I was trying to see if I could get it working with just one at the very front though.
My code:
NSMutableArray *labels = [NSMutableArray arrayWithArray:((DisplayView*)self).allSubviews];
if ([labels count] > 0) {
UILabel *mainLabel = labels[0];
[self bringSubviewToFront:mainLabel];
}
((DisplayView*)self).allSubviews = labels;
And I have also tried:
for (UILabel *label in ((DisplayView*)self).allSubviews) {
if ([label isKindOfClass:[UILabel class]]) {
[self bringSubviewToFront:label];
}
I need an alternative method of doing this, a way to bring all of the subviews forward, or someone to tell me what I am doing wrong.
Edit, here's my full code:
#interface DisplayView
#property (nonatomic, copy, readwrite) UIColor *backgroundColor;
#property (nonatomic, assign, readwrite, getter=isHidden) BOOL hidden;
#property (nonatomic, assign, readwrite, getter=isOpaque) BOOL opaque;
#property (nonatomic, assign, readwrite) CGFloat alpha;
#property (nonatomic, copy, readwrite) NSArray *allSubviews;
#property (nonatomic, assign, readwrite) CALayer *layer;
#end
%hook DisplayView
-(void)layoutSubviews {
((DisplayView*)self).opaque = NO;
((DisplayView*)self).backgroundColor = [UIColor blackColor];
((DisplayView*)self).hidden = NO;
((DisplayView*)self).alpha = 1.0;
NSMutableArray *labels = [NSMutableArray arrayWithArray:((DisplayView*)self).layer.sublayers];
if ([labels count] > 0) {
UILabel *mainLabel = labels[0];
[self bringSubviewToFront:mainLabel];
}
}
%end
%ctor {
%init(DisplayView=objc_getClass("Calculator.DisplayView"));
}

Answer 1

Seems like a few possible issues. First, there is no allSubviews on UIView, it probably should be subviews.
NSMutableArray *labels = [NSMutableArray arrayWithArray:((DisplayView*)self).subviews];
if ([labels count] > 0) {
UILabel *mainLabel = labels[0];
(Just want point out that you don't seem to change the array, so why copy it? You can directly access self.subviews)
Second, in the CALayer version, you're casting CALayer to UIView:
NSMutableArray *labels = [NSMutableArray arrayWithArray:((DisplayView*)self).layer.sublayers];
CALayer *mainLabel = labels.firstObject;
if (mainLabel) {
[labels removeObjectAtIndex:0];
[labels addObject:mainLabel];
self.layer.sublayers = labels;
}
Maybe some of this helps