Trouble with autoresizingMask and fixed margins

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];
}