0
編輯: 我試圖展示一種iTunes風格的信息欄。這是前面詳細討論的主題,例如在iTunes or Xcode style information box at top of window 我只是稍微修改了上述引用鏈接中的代碼,因此請在最近的XCode下進行編譯。 我的代碼如下:類似iTunes的狀態欄
- (void)drawRect:(NSRect)dirtyRect
{
// Drawing code here.
static NSShadow *kDropShadow = nil;
static NSShadow *kInnerShadow = nil;
static NSGradient *kBackgroundGradient = nil;
static NSColor *kBorderColor = nil;
if (kDropShadow == nil) {
kDropShadow = [[NSShadow alloc] init];
[kDropShadow setShadowColor:[NSColor colorWithCalibratedWhite:.863 alpha:.75]];
[kDropShadow setShadowOffset:NSMakeSize(0.0, -1.0)];
[kDropShadow setShadowBlurRadius:1.0];
kInnerShadow = [[NSShadow alloc] init];
[kInnerShadow setShadowColor:[NSColor colorWithCalibratedWhite:0.0 alpha:0.52]];
[kInnerShadow setShadowOffset:NSMakeSize(0.0, -1.0)];
[kInnerShadow setShadowBlurRadius:4.0];
kBorderColor = [[NSColor colorWithCalibratedWhite:0.569 alpha:1.0] retain];
// iTunes style
// kBackgroundGradient = [[NSGradient alloc] initWithColorsAndLocations:[NSColor colorWithCalibratedRed:0.929 green:0.945 blue:0.882 alpha:1.0],0.0,[NSColor colorWithCalibratedRed:0.902 green:0.922 blue:0.835 alpha:1.0],0.5,[NSColor colorWithCalibratedRed:0.871 green:0.894 blue:0.78 alpha:1.0],0.5,[NSColor colorWithCalibratedRed:0.949 green:0.961 blue:0.878 alpha:1.0],1.0, nil];
// Xcode style
kBackgroundGradient = [[NSGradient alloc] initWithColorsAndLocations:[NSColor colorWithCalibratedRed:0.957 green:0.976 blue:1.0 alpha:1.0],0.0,[NSColor colorWithCalibratedRed:0.871 green:0.894 blue:0.918 alpha:1.0],0.5,[NSColor colorWithCalibratedRed:0.831 green:0.851 blue:0.867 alpha:1.0],0.5,[NSColor colorWithCalibratedRed:0.82 green:0.847 blue:0.89 alpha:1.0],1.0, nil];
}
NSRect bounds = [self bounds];
NSBezierPath *path = [NSBezierPath bezierPathWithRoundedRect:bounds xRadius:3.5 yRadius:3.5];
[NSGraphicsContext saveGraphicsState];
[kDropShadow set];
[path fill];
[NSGraphicsContext restoreGraphicsState];
[kBackgroundGradient drawInBezierPath:path angle:-90.0];
[kBorderColor setStroke];
[path stroke];
}
這是行不通的,但是。我不認爲drawRect()方法會被調用。我錯過了什麼?請指教。
謝謝
嗨rckoenes,對不起。我沒有在stackoverflow配置文件中看到你的名字。我設法弄清楚爲什麼drawRect()沒有被調用。但是,代碼不起作用。我在我的NSView上看到黑色。我知道你編輯了我的問題,但不知道如何查看差異。如果你知道我做錯了什麼,請告知。我仍在研究這件作品。抱歉讓人煩惱。我是可可的新手。感謝您訪問我的問題[s]。 – 2014-10-07 10:29:36