暗黑模式在macOS上推出后，又推广到移动端——在iOS 13上正式开放出来！
其实简单而言就是以前常见App中的夜间模式罢了！只是集成到系统这个单例中去了而已！当然体验自我感觉不是很喜欢（不喜欢太暗色系的😂😂😂😂😂）
OK，进入主题！开始看看怎么配置iOS 13的暗黑模式！
在iOS 13(iPadOS 13同理)的设置中，叫"浅色"、"深色"！
外观："浅色"、"深色"
对应的UIUserInterfaceStyle枚举：
typedef NS_ENUM(NSInteger, UIUserInterfaceStyle) {
UIUserInterfaceStyleUnspecified,
UIUserInterfaceStyleLight,
UIUserInterfaceStyleDark,
} API_AVAILABLE(tvos(10.0)) API_AVAILABLE(ios(12.0)) API_UNAVAILABLE(watchos);
不适配暗黑模式
A.整个App都不使用，直接在项目的plist文件中设置——添加"User Interface Style"键，将值设为"UIUserInterfaceStyleLight"：
在"Source Code"中的形式：
<key>UIUserInterfaceStyle</key> <string>UIUserInterfaceStyleLight</string>
B.各个UIViewController中不使用，设置 if (@available(iOS 13.0, *)){ self.overrideUserInterfaceStyle = UIUserInterfaceStyleLight; }
设置当前的ViewController为"深色"模式后，此ViewController下的所有view都是"深色"模式！
由此ViewController所present出来的ViewController是不会受到影响的，依然跟随系统的模式！
获取当前模式(浅色、深色)
if (UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) { //当前 "深色"模式 } else { //当前 "浅色"模式 }
颜色(UIColor)的处理：
A.系统自带的视图设置相应的配色：
从 iOS 13开始UIColor是一个动态颜色，在"浅色"和"深色"模式下可以分别展示出不同的颜色！以下是iOS 13系统所提供的动态颜色：
@interface UIColor (UIColorSystemColors)
#pragma mark System colors
/* Some colors that are used by system elements and applications.
* These return named colors whose values may vary between different contexts and releases.
* Do not make assumptions about the color spaces or actual colors used.
*/
@property (class, nonatomic, readonly) UIColor *systemRedColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemGreenColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemBlueColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemOrangeColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemYellowColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemPinkColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemPurpleColor API_AVAILABLE(ios(9.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemTealColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *systemIndigoColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
/* Shades of gray. systemGray is the base gray color.
*/
@property (class, nonatomic, readonly) UIColor *systemGrayColor API_AVAILABLE(ios(7.0), tvos(9.0)) API_UNAVAILABLE(watchos);
/* The numbered variations, systemGray2 through systemGray6, are grays which increasingly
* trend away from systemGray and in the direction of systemBackgroundColor.
*
* In UIUserInterfaceStyleLight: systemGray1 is slightly lighter than systemGray.
* systemGray2 is lighter than that, and so on.
* In UIUserInterfaceStyleDark: systemGray1 is slightly darker than systemGray.
* systemGray2 is darker than that, and so on.
*/
@property (class, nonatomic, readonly) UIColor *systemGray2Color API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *systemGray3Color API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *systemGray4Color API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *systemGray5Color API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *systemGray6Color API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
#pragma mark Foreground colors
/* Foreground colors for static text and related elements.
*/
@property (class, nonatomic, readonly) UIColor *labelColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *secondaryLabelColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *tertiaryLabelColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *quaternaryLabelColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
/* Foreground color for standard system links.
*/
@property (class, nonatomic, readonly) UIColor *linkColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
/* Foreground color for placeholder text in controls or text fields or text views.
*/
@property (class, nonatomic, readonly) UIColor *placeholderTextColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
/* Foreground colors for separators (thin border or divider lines).
* `separatorColor` may be partially transparent, so it can go on top of any content.
* `opaqueSeparatorColor` is intended to look similar, but is guaranteed to be opaque, so it will
* completely cover anything behind it. Depending on the situation, you may need one or the other.
*/
@property (class, nonatomic, readonly) UIColor *separatorColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
@property (class, nonatomic, readonly) UIColor *opaqueSeparatorColor API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
#pragma mark Background colors
/* We provide two design systems (also known as "stacks") for structuring an iOS app's backgrounds.
*
* Each stack has three "levels" of background colors. The first color is intended to be the
* main background, farthest back. Secondary and tertiary colors are layered on top
* of the main background, when appropriate.
*
* Inside of a discrete piece of UI, choose a stack, then use colors from that stack.
* We do not recommend mixing and matching background colors between stacks.
* The foreground colors above are designed to work in both stacks.
*
* 1. systemBackground
* Use this stack for views with standard table views, and designs which have a white
* primary background in light mode.
*/
@property (class, nonatomic, readonly) UIColor *systemBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *secondarySystemBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *tertiarySystemBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
/* 2. systemGroupedBackground
* Use this stack for views with grouped content, such as grouped tables and
* platter-based designs. These are like grouped table views, but you may use these
* colors in places where a table view wouldn't make sense.
*/
@property (class, nonatomic, readonly) UIColor *systemGroupedBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *secondarySystemGroupedBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
@property (class, nonatomic, readonly) UIColor *tertiarySystemGroupedBackgroundColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
#pragma mark Fill colors
/* Fill colors for UI elements.
* These are meant to be used over the background colors, since their alpha component is less than 1.
*
* systemFillColor is appropriate for filling thin and small shapes.
* Example: The track of a slider.
*/
@property (class, nonatomic, readonly) UIColor *systemFillColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
/* secondarySystemFillColor is appropriate for filling medium-size shapes.
* Example: The background of a switch.
*/
@property (class, nonatomic, readonly) UIColor *secondarySystemFillColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
/* tertiarySystemFillColor is appropriate for filling large shapes.
* Examples: Input fields, search bars, buttons.
*/
@property (class, nonatomic, readonly) UIColor *tertiarySystemFillColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
/* quaternarySystemFillColor is appropriate for filling large areas containing complex content.
* Example: Expanded table cells.
*/
@property (class, nonatomic, readonly) UIColor *quaternarySystemFillColor API_AVAILABLE(ios(13.0)) API_UNAVAILABLE(tvos, watchos);
#pragma mark Other colors
/* lightTextColor is always light, and darkTextColor is always dark, regardless of the current UIUserInterfaceStyle.
* When possible, we recommend using `labelColor` and its variants, instead.
*/
@property(class, nonatomic, readonly) UIColor *lightTextColor API_UNAVAILABLE(tvos); // for a dark background
@property(class, nonatomic, readonly) UIColor *darkTextColor API_UNAVAILABLE(tvos); // for a light background
/* groupTableViewBackgroundColor is now the same as systemGroupedBackgroundColor.
*/
@property(class, nonatomic, readonly) UIColor *groupTableViewBackgroundColor API_DEPRECATED_WITH_REPLACEMENT("systemGroupedBackgroundColor", ios(2.0, 13.0), tvos(13.0, 13.0));
@property(class, nonatomic, readonly) UIColor *viewFlipsideBackgroundColor API_DEPRECATED("", ios(2.0, 7.0)) API_UNAVAILABLE(tvos);
@property(class, nonatomic, readonly) UIColor *scrollViewTexturedBackgroundColor API_DEPRECATED("", ios(3.2, 7.0)) API_UNAVAILABLE(tvos);
@property(class, nonatomic, readonly) UIColor *underPageBackgroundColor API_DEPRECATED("", ios(5.0, 7.0)) API_UNAVAILABLE(tvos);
@end
对于ViewController：
[self.view setBackgroundColor:[UIColor systemBackgroundColor]];
对于UITableviewCell：
[self.titleLabel setTextColor:[UIColor labelColor]];
[self.detailLabel setTextColor:[UIColor placeholderTextColor]];
+ (UIColor *)colorWithDynamicProvider:(UIColor * (^)(UITraitCollection *traitCollection))dynamicProvider API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
- (UIColor *)initWithDynamicProvider:(UIColor * (^)(UITraitCollection *traitCollection))dynamicProvider API_AVAILABLE(ios(13.0), tvos(13.0)) API_UNAVAILABLE(watchos);
使用方式如下：
self.bgView.backgroundColor = [UIColor whiteColor];在需要处理暗黑模式的地方，再添加上如下代码：(设置相应配色)
if (@available(iOS 13.0, *)) { UIColor * rightColor = [UIColor colorWithDynamicProvider:^UIColor * _Nonnull(UITraitCollection * _Nonnull trainCollection) { if ([trainCollection userInterfaceStyle] == UIUserInterfaceStyleLight) { //浅色模式 return [UIColor whiteColor]; } else { //深色模式 return [UIColor blackColor]; } }]; self.bgView.backgroundColor = rightColor; //根据当前模式(光明\暗黑)-展示相应颜色 }
图片的处理
在Xcode 11中，为".xcassets"文件带来了更新以自动读取加载"浅色"/"深色"模式的资源(其中的图片)！
修改资源的Appearances属性，来设置是否要支持"浅色"/"深色"模式及相应的资源内容("浅色"图片/"深色"图片)！在调用“[UIImage imageNamed:@"图片名"]”方法时，会自动加载相应的"浅色"/"深色"资源("浅色"图片/"深色"图片)。
图片资源的Appearances属性有三个选项："None"、"Any,Dark"、"Any,Light,Dark"！
选第二项就够用了("默认"/"深色"模式)！要选第三项进行配置也行("默认"/"浅色"/"深色"模式)！
选择第二项("默认"/"深色"模式)
"浅色"/"深色"模式的效果：
"浅色"/"深色"模式下的效果
模式切换的监听
在需要监听的viewController中，重写如下方法(得到切换前的模式)：
-(void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
[super traitCollectionDidChange:previousTraitCollection];
//previousTraitCollection：之前的模式("浅色"/"深色")
if (@available(iOS 13.0, *)) {
switch (previousTraitCollection.userInterfaceStyle) { //之前的模式("浅色"/"深色")
case UIUserInterfaceStyleUnspecified:{ // 0
NSLog(@"previousTraitCollection: UIUserInterfaceStyleUnspecified");
} break;
case UIUserInterfaceStyleLight:{
NSLog(@"previousTraitCollection: UIUserInterfaceStyleLight");
} break;
case UIUserInterfaceStyleDark:{
NSLog(@"previousTraitCollection: UIUserInterfaceStyleDark");
} break;
default:
break;
}
if (UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) { //当前 "深色"模式
NSLog(@"now changedTo TraitCollection: UIUserInterfaceStyleDark");
} else { //当前 "浅色"模式
NSLog(@"now changedTo TraitCollection: UIUserInterfaceStyleLight");
}
//⭐️进行相应的 界面UI调整⭐️
}
}
“判断两个
UITraitCollection对象是否不同”的方法：- (BOOL)hasDifferentColorAppearanceComparedToTraitCollection:(UITraitCollection *)traitCollection;
实时观察当前模式（其他方法）
根据实时返回的trainCollection进行监听方法的调用：
[weakSelf performSelector:@selector(traitCollectionChanged:) withObject:trainCollection];！
以“+ (UIColor *)colorWithDynamicProvider:(UIColor * (^)(UITraitCollection *traitCollection))dynamicProvider”方法为跳板！UIColor * rightColor = [UIColor colorWithDynamicProvider:^UIColor * _Nonnull(UITraitCollection * _Nonnull trainCollection) { [weakSelf performSelector:@selector(traitCollectionChanged:) withObject:trainCollection]; if ([trainCollection userInterfaceStyle] == UIUserInterfaceStyleLight) { return [UIColor whiteColor]; } else { return [UIColor blackColor]; } }];
对“-(void)traitCollectionChanged:(UITraitCollection *)traitCollection”方法的调用：-(void)traitCollectionChanged:(UITraitCollection *)traitCollection{ if (@available(iOS 13.0, *)) { switch (traitCollection.userInterfaceStyle) { case UIUserInterfaceStyleUnspecified:{ NSLog(@"Now traitCollection: UIUserInterfaceStyleUnspecified"); } break; case UIUserInterfaceStyleLight:{ NSLog(@"Now traitCollection: UIUserInterfaceStyleLight"); } break; case UIUserInterfaceStyleDark:{ NSLog(@"Now traitCollection: UIUserInterfaceStyleDark"); } break; default: break; } //⭐️进行相应的 界面UI调整⭐️ } }
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