I am having a strange problem with UIBarButtonItem. I am creating one with a custom view, and the view is of my own MyCustomView type. It contains couple of labels and some other subviews. Whenever I use autolayout in this custom view class to lay out the subviews - the button is displayed on top-left corner of the screen! You can see it in the picture below - MyCustomView just has one subview with gray background and I use autolayout to stretch it to fill the parent MyCustomView:
When I don't use autolayout everything is fine and the button is displayed normally:
Can anyone explain me what is going on here and am I allowed to use autolayout in custom views which are going to be put in UIBarButtonItems (maybe not on the topmost level) ?
UPDATE: this happens after I do
self.translatesAutoresizingMaskIntoConstraints = NO;
in MyCustomView - in the top view which should be placed in bar button. I am doing it to make the system call my intrinsicContentSize method. I guess using the old sizeThatFits: instead would still be ok.
UPDATE 2: Here is the test code:
UIControl *cus = [[UIControl alloc] initWithFrame:CGRectMake(0, 0, 22, 22)];
// uncomment the following line to mess everything
//cus.translatesAutoresizingMaskIntoConstraints = NO;
cus.backgroundColor = [UIColor redColor];
UILabel *label = [UILabel new];
label.translatesAutoresizingMaskIntoConstraints = NO;
label.text = @"Q";
[label sizeToFit];
label.font = [UIFont systemFontOfSize:18];
[cus addSubview:label];
NSLayoutConstraint *centerX1 = [NSLayoutConstraint constraintWithItem:cus
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:label
attribute:NSLayoutAttributeCenterX
multiplier:1
constant:0];
NSLayoutConstraint *centerY1 = [NSLayoutConstraint constraintWithItem:cus
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:label
attribute:NSLayoutAttributeCenterY
multiplier:1
constant:0];
[cus addConstraints:@[centerX1, centerY1]];
UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:cus];
controller.navigationItem.rightBarButtonItem = barButton;
I would be happy to get explanations to understand what is going on.
