Trouble with autoresizingMask and fixed margins - iphone

Question

I'm trying to get this to work with code in a ViewController's view:
but I can't get it to work.
I've tried
-(void)loadView {
UIView *contentView = [[[UIView alloc] init] autorelease];
self.view = contentView;
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(5,5,0,100);
button.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[contentView addSubview:button];
}
but the width of the button is still the width of the superview...
I'm sure there's an easy explanation.
Thanks, everybody!
Antonio

Answer 1

-initWithFrame: is the designated initializer for UIView. On the Mac side (NSView) I know strange things can happen when using -init instead of -initWithFrame:. Perhaps this is the problem?

Answer 2

Instead of bothering with the autoresizingMask flag, I override layoutSubviews in custom UIView subclass:
- (void)loadView {
self.view = [ContentView view];
self.view.frame = CGRectMake(0, 0, 30, 100);
}
where ContentView is defined as:
#interface ContentView : UIView {
UIButton *button;
}
+ (id)view;
#end
#implementation ContentView {
+ (id)view {
return [[self new] autorelease];
}
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
button = [UIButton buttonWithType:UIButtonTypeCustom];
[self addSubview:button]; // Retains the button.
}
return self;
}
- (void)layoutSubviews {
const CGFloat margin = 5;
CGRect size = self.frame.size;
button.frame = CGRectMake(margin, margin,
size.width - 2 * margin,
size.height - 2 * margin);
}
}

Answer 3

Try this code.
- (void)loadView
{
CGRect screenBounds = [UIScreen mainScreen].bounds;
UIView *contentView = [[[UIView alloc] initWithFrame:screenBounds] autorelease];
self.view = contentView;
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(5,5,screenBounds.size.width - 10,100);
[button setTitle:#"hello" forState:UIControlStateNormal];
button.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[contentView addSubview:button];
}