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CTAppearance

CTAppearance is a clone of the native UIAppearance proxy.

It's current purpose is to provide an alternative to UIAppearance on iOS7. In iOS7 GM UIAppearance is currently very slow and is unusable for apps that make heavy use of this feature.

Usage - Simple

Simply just include the CTAppearance files in your project. This will replace all use of UIAppearance with CTAppearance. By default any appearance or appearanceWhenContainedIn calls will use the ones provided by CTAppearance

Usage - Custom

To avoid replacing all use of UIAppearance define the macro

#define CTAPPEARANCE_DISABLE_AUTO_INSTALL 1

and enable

[CTAppearance setEnabled: YES];

The appearance proxy can then be called using appearanceCT and appearanceCTWhenContainedIn

[[UILabel appearanceCT] setBackgroundColor: [UIColor redColor]];
[[UILabel appearanceCTWhenContainedIn: [UIView class], nil] setTextColor:[UIColor blueColor]];

Limitations

WARNING: Does not currently respect properties that have been manually assigned.

So in the following case:

[[UILabel appearanceCT] setBackgroundColor: [UIColor redColor]];

UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0,0,100,20)];
label.backgroundColor = [UIColor greenColor];

The label will remain redColor.

As the work currently happens in willMoveToSuperview, it's generally possible to make the modifications after addSubview like so:

[[UILabel appearanceCT] setBackgroundColor: [UIColor redColor]];

UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0,0,100,20)];
[self addSubview: label];
label.backgroundColor = [UIColor greenColor];

The solutions I know about to fix / support this feature require a lot of swizzling hackery, and for our current use case was not worth the performance and stability trade off. But if anyone knows a good way of handling this functionality I'll be happy to accept your pull request or please let me know your ideas!

Contact

David Fumberger @djfumberger

License

CTChromecast is available under the MIT license. See the LICENSE file for more info.

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Replacement for UIAppearance

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