如何用自定义NSButtonCell编程地分配NSButton的子类

Question

我试图创建NSButton的子类，也使用NSButtonCell的子类，但我不能在代码中做到这一点!

这是我的nsbuttoncell子类如果我在IB中创建按钮并直接在IB中设置他的单元格类，效果会很好:

#import "MyCustomCell.h"
@implementation MyCustomCell
- (void)drawImage:(NSImage*)image withFrame:(NSRect)frame inView:(NSView*)controlView
{
    NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
    CGContextRef contextRef = [ctx graphicsPort];
    NSData *data = [image TIFFRepresentation];
    CGImageSourceRef source = CGImageSourceCreateWithData((CFDataRef)data, NULL);
    if(source) {
        CGImageRef imageRef = CGImageSourceCreateImageAtIndex(source, 0, NULL);
        CFRelease(source);
        CGContextSaveGState(contextRef);
        {
            NSRect rect = NSOffsetRect(frame, 0.0f, 1.0f);
            CGFloat white = [self isHighlighted] ? 0.2f : 0.35f;
            CGContextClipToMask(contextRef, NSRectToCGRect(rect), imageRef);
            [[NSColor colorWithDeviceWhite:white alpha:1.0f] setFill];
            NSRectFill(rect);
        } 
        CGContextRestoreGState(contextRef);
        CGContextSaveGState(contextRef);
        {
            NSRect rect = frame;
            CGContextClipToMask(contextRef, NSRectToCGRect(rect), imageRef);
            [[NSColor colorWithDeviceWhite:0.1f alpha:1.0f] setFill];
            NSRectFill(rect);
        } 
        CGContextRestoreGState(contextRef);        
        CFRelease(imageRef);
    }
 }
 - (void)drawBezelWithFrame:(NSRect)frame inView:(NSView *)controlView
 {
    NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
    CGFloat roundedRadius = 3.0f;
    BOOL outer = YES;
    BOOL background = YES;
    BOOL stroke = YES;
    BOOL innerStroke = YES;
    if(outer) {
        [ctx saveGraphicsState];
        NSBezierPath *outerClip = [NSBezierPath bezierPathWithRoundedRect:frame   xRadius:roundedRadius yRadius:roundedRadius];
        [outerClip setClip];
        NSGradient *outerGradient = [[NSGradient alloc] initWithColorsAndLocations:
                                 [NSColor colorWithDeviceWhite:0.20f alpha:1.0f], 0.0f, 
                                 [NSColor colorWithDeviceWhite:0.21f alpha:1.0f], 1.0f, 
                                 nil];
        [outerGradient drawInRect:[outerClip bounds] angle:90.0f];
        [outerGradient release];
        [ctx restoreGraphicsState];
    }
    if(background) {
        [ctx saveGraphicsState];
        NSBezierPath *backgroundPath = [NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.0f, 2.0f) xRadius:roundedRadius yRadius:roundedRadius];
        [backgroundPath setClip];
        NSGradient *backgroundGradient = [[NSGradient alloc] initWithColorsAndLocations:
                                      [NSColor colorWithDeviceWhite:0.17f alpha:1.0f], 0.0f, 
                                      [NSColor colorWithDeviceWhite:0.20f alpha:1.0f], 0.12f, 
                                      [NSColor colorWithDeviceWhite:0.27f alpha:1.0f], 0.5f, 
                                      [NSColor colorWithDeviceWhite:0.30f alpha:1.0f], 0.5f, 
                                      [NSColor colorWithDeviceWhite:0.42f alpha:1.0f], 0.98f, 
                                      [NSColor colorWithDeviceWhite:0.50f alpha:1.0f], 1.0f, 
                                      nil];
        [backgroundGradient drawInRect:[backgroundPath bounds] angle:270.0f];
        [backgroundGradient release];
        [ctx restoreGraphicsState];
    }
    if(stroke) {
        [ctx saveGraphicsState];
        [[NSColor colorWithDeviceWhite:0.12f alpha:1.0f] setStroke];
        [[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 1.5f, 1.5f) xRadius:roundedRadius yRadius:roundedRadius] stroke];
        [ctx restoreGraphicsState];
    }
    if(innerStroke) {
        [ctx saveGraphicsState];
        [[NSColor colorWithDeviceWhite:1.0f alpha:0.05f] setStroke];
        [[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.5f, 2.5f) xRadius:roundedRadius yRadius:roundedRadius] stroke];
        [ctx restoreGraphicsState];        
    }
    if([self isHighlighted]) {
        [ctx saveGraphicsState];
        [[NSBezierPath bezierPathWithRoundedRect:NSInsetRect(frame, 2.0f, 2.0f) xRadius:roundedRadius yRadius:roundedRadius] setClip];
        [[NSColor colorWithCalibratedWhite:0.0f alpha:0.35] setFill];
        NSRectFillUsingOperation(frame, NSCompositeSourceOver);
        [ctx restoreGraphicsState];
    }
}
@end

我还创建了一个自定义NSButton子类，使用这个NSButtonCell

#import "myButton.h"
#import "MyCustomCell.h"
@implementation myButton
- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        [self setCell:[[MyCustomCell alloc] init]];
        self.image = [NSImage imageNamed:@"add"];
    }
    return self;
}
@end

但是当我在我的视图中创建这个按钮时，按钮的外观是默认的，而不是NSButtonCell子类的自定义样式。如果我在IB中设置单元格，所有工作都很好，但不是在代码中。有人有解决这个问题的办法吗?谢谢!

Answer 1

我知道怎么解决这个问题了。

需要设置调用setBezelStyle的按钮的边框样式。使用这行代码，除了图像是颠倒的之外，所有工作都很好。

Answer 2

您是否尝试使用cellClass类方法?

+ (Class)cellClass {
    return MyCustomCell.class;
}