tintColor&tintAdjustmentMode
/*
-tintColor always returns a color. The color returned is the first non-default value in the receiver's superview chain (starting with itself).
If no non-default value is found, a system-defined color is returned.
If this view's -tintAdjustmentMode returns Dimmed, then the color that is returned for -tintColor will automatically be dimmed.
If your view subclass uses tintColor in its rendering, override -tintColorDidChange in order to refresh the rendering if the color changes.
*/
@property(null_resettable, nonatomic, strong) UIColor *tintColor NS_AVAILABLE_IOS(7_0);
/*
-tintAdjustmentMode always returns either UIViewTintAdjustmentModeNormal or UIViewTintAdjustmentModeDimmed. The value returned is the first non-default value in the receiver's superview chain (starting with itself).
If no non-default value is found, UIViewTintAdjustmentModeNormal is returned.
When tintAdjustmentMode has a value of UIViewTintAdjustmentModeDimmed for a view, the color it returns from tintColor will be modified to give a dimmed appearance.
When the tintAdjustmentMode of a view changes (either the view's value changing or by one of its superview's values changing), -tintColorDidChange will be called to allow the view to refresh its rendering.
*/
@property(nonatomic) UIViewTintAdjustmentMode tintAdjustmentMode NS_AVAILABLE_IOS(7_0);
/*
The -tintColorDidChange message is sent to appropriate subviews of a view when its tintColor is changed by client code or to subviews in the view hierarchy of a view whose tintColor is implicitly changed when its superview or tintAdjustmentMode changes.
*/
- (void)tintColorDidChange NS_AVAILABLE_IOS(7_0);
typedef NS_ENUM(NSInteger, UIViewTintAdjustmentMode) {
UIViewTintAdjustmentModeAutomatic,
UIViewTintAdjustmentModeNormal,
UIViewTintAdjustmentModeDimmed,
} NS_ENUM_AVAILABLE_IOS(7_0);
解释：
tintColor默认为系统定义颜色，tintColor值改变，更新view hierarchy的tintColor值，并调用tintColorDidChangetintAdjustmentMode默认为UIViewTintAdjustmentModeNormal，tintAdjustmentMode值改变，更新view hierarchy的tintAdjustmentMode值，并调用tintColorDidChangetintAdjustmentMode值为UIViewTintAdjustmentModeDimmed时，会对tintColor进行灰色处理tintColor不支持pattern image，如果tintColor为pattern image，throw exception
应用
@interface FBView : UIView
@end
@implementation FBView
- (void)tintColorDidChange
{
NSLog(@"tintColorDidChange: tag = %ld, tintColor = %@, tintAdjustmentMode = %lu", self.tag, self.tintColor, self.tintAdjustmentMode);
}
@end
- (void)tint
{
FBView *view = [[FBView alloc] initWithFrame:CGRectZero];
FBView *view1 = [[FBView alloc] initWithFrame:CGRectZero];
FBView *view2 = [[FBView alloc] initWithFrame:CGRectZero];
FBView *view1_1 = [[FBView alloc] initWithFrame:CGRectZero];
FBView *view1_2 = [[FBView alloc] initWithFrame:CGRectZero];
view.tag = 5;
view1.tag = 1;
view2.tag = 2;
view1_1.tag = 11;
view1_2.tag = 12;
[self.view addSubview:view];
[view addSubview:view1];
[view addSubview:view2];
[view1 addSubview:view1_1];
[view1 addSubview:view1_2];
NSLog(@"default: tag = %ld, tintColor = %@, tintAdjustmentMode = %lu", view.tag, view.tintColor, view.tintAdjustmentMode);
NSLog(@"change tintColor");
view.tintColor = [UIColor blueColor];
NSLog(@"change tintAdjustmentMode");
view.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed;
}
output：
default: tag = 5, tintColor = UIDeviceRGBColorSpace 0 0.478431 1 1, tintAdjustmentMode = 1
change tintColor
tintColorDidChange: tag = 5, tintColor = UIDeviceRGBColorSpace 0 0 1 1, tintAdjustmentMode = 1
tintColorDidChange: tag = 1, tintColor = UIDeviceRGBColorSpace 0 0 1 1, tintAdjustmentMode = 1
tintColorDidChange: tag = 11, tintColor = UIDeviceRGBColorSpace 0 0 1 1, tintAdjustmentMode = 1
tintColorDidChange: tag = 12, tintColor = UIDeviceRGBColorSpace 0 0 1 1, tintAdjustmentMode = 1
tintColorDidChange: tag = 2, tintColor = UIDeviceRGBColorSpace 0 0 1 1, tintAdjustmentMode = 1
change tintAdjustmentMode
tintColorDidChange: tag = 5, tintColor = UIDeviceWhiteColorSpace 0.11 0.8, tintAdjustmentMode = 2
tintColorDidChange: tag = 1, tintColor = UIDeviceWhiteColorSpace 0.11 0.8, tintAdjustmentMode = 2
tintColorDidChange: tag = 11, tintColor = UIDeviceWhiteColorSpace 0.11 0.8, tintAdjustmentMode = 2
tintColorDidChange: tag = 12, tintColor = UIDeviceWhiteColorSpace 0.11 0.8, tintAdjustmentMode = 2
tintColorDidChange: tag = 2, tintColor = UIDeviceWhiteColorSpace 0.11 0.8, tintAdjustmentMode = 2
