Question

I made a custom UIView class and trying to set up in it an UISwitch controller programmatically. The UISwitch won’t show up. Where’s the evil?

UIView class:

- (void)viewWillAppear:(BOOL)animated
{
    uiSwitch=[[[UISwitch alloc]initWithFrame:CGRectMake(5.00,200.00,79,27)] autorelease];
    [uiSwitch addTarget:self action:@selector(uiSwitchCurrentStatus) forControlEvents:UIControlEventValueChanged];
    [self addSubview:uiSwitch];
}

I’ve checked another issues regarding UIswitch, but all of them seems like not my case. Thank you in advance.

Answer 1

_{(if inside UIViewCotroller)} Try [self.view addSubview:uiSwitch];

Or if this really inside the UIView class, move the whole method to a view controller.

Or put the the code in UIView‘s layoutSubviews.

And in any case you should check, if the switch already exists. Otherwise it could be leaking.

Also _{if placed in view controller}- (void)viewDidLoad might be the better place.

-(void)layoutSubviews{
    if (!uiSwitch){
        uiSwitch=[[[UISwitch alloc]initWithFrame:CGRectMake(5.00,200.00,79,27)] autorelease];
        [uiSwitch addTarget:self action:@selector(uiSwitchCurrentStatus) forControlEvents:UIControlEventValueChanged];
        [self addSubview:uiSwitch];
    }

}