UIWindow的UIWindowLevel属性
2019-11-01 本文已影响0人
下班不写程序
@property(nonatomic) UIWindowLevel windowLevel; // default = 0.0
typedef CGFloat UIWindowLevel NS_TYPED_EXTENSIBLE_ENUM; // CGFloat类型, 可主动赋值.
UIKIT_EXTERN const UIWindowLevel UIWindowLevelNormal; // 0
UIKIT_EXTERN const UIWindowLevel UIWindowLevelAlert; // 2000.00
UIKIT_EXTERN const UIWindowLevel UIWindowLevelStatusBar API_UNAVAILABLE(tvos); // 1000.00
windowLevel越大, 显示就在越上层, 当windowLevel相等时, 后实例化的显示在最上层.
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