CODEWITHSUNDEEP
objective-ciosuser-interface
mishod
mishod

Reputation: 1040

-[UICIColor colorSpaceName]: unrecognized selector sent to instance

I am creating several classes for theme-ing support in my iOS 5 app. My themes are stored in plist and I load them up in a Theme object, which I use in my app to initialize various controls. I store the colors as strings in my theme and then I use this code to convert them to UIColor:

UIColor* color = [UIColor colorWithCIColor:[CIColor colorWithString:@"0.5 0.5 0.5 1.0"]];

This works fine for most controls, however when I try to set the tint color of the navigation bar as such:

//navigation bar
[self.navigationController.navigationBar setTintColor:color];

I get this exception:

-[UICIColor colorSpaceName]: unrecognized selector sent to instance

When I initialize the color without using CIColor e.g. like this:

UIColor* color = [UIColor colorWithRed:0.5 green:0.5 blue:0.5 alpha:1.0];
[self.navigationController.navigationBar setTintColor:color];

All works great.

Any clues what is causing this? I could not find much info about UICIColor, but I am guessing since UIColor is only a wrapper on top of CGColor or CIColor there are implementation differences.

Upvotes: 5

Views: 2516

Answers (3)

sam_smith
sam_smith

Reputation: 6093

I had similar issues with 

[UIColor colorWithCIColor:[CIColor colorWithString:color]];

Although I looked for an elegant fix for this, in the end I settled with a solution that stopped the problem and enabled my app to continue exactly as before.

My color string was in the same format as yours:

"0.5 0.7 0.2 0.75"

I found the easiest way to fix it was just to do the following:

NSArray * colorParts = [color componentsSeparatedByString: @" "];

CGFloat red = [[colorParts objectAtIndex:0] floatValue];
CGFloat green = [[colorParts objectAtIndex:1] floatValue];
CGFloat blue = [[colorParts objectAtIndex:2] floatValue];
CGFloat alpha = [[colorParts objectAtIndex:3] floatValue];

UIColor * newColor = [UIColor colorWithRed:red green:green blue:blue alpha:alpha];

Manually splitting out each value and then putting then into the colorWithRed: code.

It means you can keep your color string but get rid of the problematic colorWithString code which is causing all the crashes.

Hope this helps

Upvotes: 0

user2015378
user2015378

Reputation: 21

See Strange crash when I try to access to uibutton's titleLabel property (xcode 4.5 and IOS sdk 6.0)

I found a workaround : before using my colorWithCIColor, I made a copy of it with :

newcolor = [UIColor colorWithCGColor:newcolor.CGColor];

and it solves the crash. Strange, anyway

Upvotes: 2

binbinming
binbinming

Reputation: 11

UIColor define in iOS 2.0 ,because of [UIColor colorWithCIColor] convert to iOS5.0, I think that apple convert error, you can using below code:

    CIColor *ci_ = [CIColor colorWithString:colorString];
    UIColor *color = [UIColor colorWithRed:ci_.red green:ci_.green blue:ci_.blue alpha:ci_.alpha];
    // UIColor *color = [UIColor colorWithCIColor:[CIColor colorWithString:colorString]];

Upvotes: -1

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