objective-c - 带圆角的 NSTextField？

Question

我正在尝试围绕 NSTextField 绘制圆角。

我继承了 NSTextField，尝试了下面的代码，但没有任何结果......

有什么想法吗？

- (void)drawRect:(NSRect)dirtyRect
{

    // black outline
    NSRect blackOutlineFrame = NSMakeRect(0.0, 0.0, [self bounds].size.width, [self bounds].size.height-1.0);
    NSGradient *gradient = nil;
    if ([NSApp isActive]) {
        gradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedWhite:0.24 alpha:1.0] endingColor:[NSColor colorWithCalibratedWhite:0.374 alpha:1.0]];
    }
    else {
        gradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedWhite:0.55 alpha:1.0] endingColor:[NSColor colorWithCalibratedWhite:0.558 alpha:1.0]];
    }
    [gradient drawInBezierPath:[NSBezierPath bezierPathWithRoundedRect:blackOutlineFrame xRadius:5 yRadius:5] angle:90];

}

Answer 1

最好将 NSTextFieldCell 子类化以绘制圆角以保留 NSTextField 功能，例如:

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
    NSBezierPath *betterBounds = [NSBezierPath bezierPathWithRoundedRect:cellFrame xRadius:CORNER_RADIUS yRadius:CORNER_RADIUS];
    [betterBounds addClip];
    [super drawWithFrame:cellFrame inView:controlView];
    if (self.isBezeled) {
        [betterBounds setLineWidth:2];
        [[NSColor colorWithCalibratedRed:0.510 green:0.643 blue:0.804 alpha:1] setStroke];
        [betterBounds stroke];
    }
}

产生一个完美的圆形文本字段(如果您首先将其设置为绘制矩形边框，至少):