NSWindow私有方法调整窗口的阴影

窗口的阴影大致有以下几种表现：

NSWindow默认阴影效果

但是有时候这个行为不让PM满意，遗憾的是AppKit并没有对外暴露接口以供我们更改窗口的shadow效果，但我找到了如下方法以供参考。

改变NSWindow的阴影效果相关的方法

OFFSET:

-(NSSize)_shadowOffset; //!< Titled (0, 8), Borderless (0, 4)

-(NSSize)_shadowOffsetForActiveAppearance:(BOOL)arg1;//!< 顾名思义

- (NSSize)_shadowOffsetForOptions:(unsigned long long)arg1;//!< 参数未研究

RIM:

- (NSDictionary*)_shadowRimInfo;//<! 比如 @{@"kCUIMeasureWindowFrameRimDensity" : @(0)}

OVERRALL:

- (NSDictionary*)shadowParameters;

/* 比如 Titled

    "com.apple.WindowShadowDensityActive" = "0.5";

    "com.apple.WindowShadowDensityInactive" = "0.3";

    "com.apple.WindowShadowRadiusActive" = 20;

    "com.apple.WindowShadowRadiusInactive" = 15;

    "com.apple.WindowShadowRimDensityActive" = 0;

    "com.apple.WindowShadowRimDensityInactive" = 0;

    "com.apple.WindowShadowRimStyleHardActive" = 0;

    "com.apple.WindowShadowRimStyleHardInactive" = 0;

    "com.apple.WindowShadowVerticalOffsetActive" = 24;

    "com.apple.WindowShadowVerticalOffsetInactive" = 8;

*/

REFRESH: 非必须

self.hasShadow = NO; self.hasShadow = YES; //!< or [self invalidateShadow]

效果:

点击上面图片内容查看原图