Question

I insert an UIActivityIndicator on my loading screen.
When I changed the color to black color it all work fine on devices with iOS 6.0 version however its crash on devices with older versions.
here is my code:

indicator = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(110, 275, 30, 30)];
[indicator setColor:[UIColor blackColor]];//in this line i get crash.
[indicator startAnimating];
[self addSubview:indicator];

can someone tell me how can i fix this issue?

Thanks a lot,

Elad.

Answer 1

UIActivityIndicatorView only supports changing the color on iOS 5.0 and above.

You can test whether the UIActivityIndicatorView supports changing the color using respondsToSelector:.

indicator = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(110, 275, 30, 30)];

// Check if indicator supports changing the color
if ([indicator respondsToSelector:@selector(setColor:)]) {
    [indicator setColor:[UIColor blackColor]];
}

[indicator startAnimating];  
[self addSubview:indicator];