Post on 08-Mar-2015
These are confidential sessions—please refrain from streaming, blogging, or taking pictures
Session 114
Customizing the Appearanceof UIKit Controls
Chris ParkeriOS Frameworks Engineer
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Tint color
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Tint color
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Tint color
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Images
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setBackgroundImage:forBarMetrics:
typedef enum { UIBarMetricsDefault, UIBarMetricsLandscapePhone,} UIBarMetrics;
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titleTextAttributes:
leftBarButtonItems:rightBarButtonItems:
leftItemsSupplementBackButton
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titleTextAttributes:
leftBarButtonItems:rightBarButtonItems:
leftItemsSupplementBackButton
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titleTextAttributes:
leftBarButtonItems:rightBarButtonItems:
leftItemsSupplementBackButton
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setBackgroundImage:forState:barMetrics:
setBackButtonBackgroundImage:forState:barMetrics:
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setBackgroundImage:forState:barMetrics:
setBackButtonBackgroundImage:forState:barMetrics:
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Customizing instancesDemo
Marian GoldeeniOS Frameworks Mountain Biker
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Writing customization API is difficult
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Using customization API is difficult
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Consistent look
Easy
Support application features
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[aSlider setMinimumTrackTintColor:[UIColor redColor]];
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[[UISlider appearance] setMinimumTrackTintColor:[UIColor redColor]];
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[[UISlider appearance] setMinimumTrackTintColor:[UIColor redColor]];
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[[UISlider appearance] setMinimumTrackTintColor:[UIColor redColor]];
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Appearance ProxyUIAppearance.h
@protocol UIAppearance <NSObject>
+ (id)appearance;...
@end
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Appearance ProxyUIAppearance.h
@protocol UIAppearance <NSObject>
+ (id)appearance;...
@end
#define UI_APPEARANCE_SELECTOR
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Appearance proxy basicsDemo
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Zap
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Zap
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Appearance ProxyUIAppearance.h
@protocol UIAppearance <NSObject>
+ (id)appearance;+ (id)appearanceWhenContainedIn:(Class<UIAppearanceContainer>)containerClass, ...;
@end
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Appearance ProxyUIAppearance.h
@protocol UIAppearance <NSObject>
+ (id)appearance;+ (id)appearanceWhenContainedIn:(Class<UIAppearanceContainer>)containerClass, ...;
@end
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Containment
[[UIButton appearanceWhenContainedIn: [UINavigationController class], nil] setTitleColor:[UIColor redColor] forControlState:UIControlStateNormal];
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Containment
[[UIButton appearanceWhenContainedIn: [UINavigationController class], nil] setTitleColor:[UIColor redColor] forControlState:UIControlStateNormal];
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Zap
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Zap
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Containment
[[UIButton appearanceWhenContainedIn: [CustomViewController class], [UINavigationController class], nil] setTitleColor:[UIColor redColor] forControlState:UIControlStateNormal];
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Zap
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Zap
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ContainmentComposition rules
The button’s appearance……when contained in a CustomViewController…when contained in a UINavigationController
[[UIButton appearanceWhenContainedIn: [CustomViewController class], [UINavigationController class], nil] setTitleColor:[UIColor redColor] forControlState:UIControlStateNormal];
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ContainmentDemo
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What is Happening?Rule application
• Just before -[UIView layoutSubviews] is called…■ Rules are evaluated■ Customizations are applied
•Updates are applied at the time the hierarchy is changed■ At the hierarchy change point■ Does not update in real time
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Zap
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Zap[ setTitleColor: [UIColor greenColor] forControlState: UIControlStateNormal];
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Zap
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Zap
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[[UISlider appearance] setMinimumTrackTintColor:[UIColor redColor]];
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Zap
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Zap
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Bill DudneyApplication Frameworks Evangelistdudney@apple.com
DocumentationiOS Dev Centerhttp://developer.apple.com/devcenter/ios/
Apple Developer Forumshttp://devforums.apple.com
More Information
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