iPhone - 尝试制作纯色UIToolbar

Question

我想让我的UIToolbar灰色.这必须适用于iOS 4.3+

我已经将我的UIToolbar子类化并添加了这个

- (void)drawRect:(CGRect)rect {

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextSaveGState(ctx);

        [[UIColor colorWithRed:64.0f/255.0f
                         green:64.0f/255.0f
                          blue:64.0f/255.0f
                         alpha:1.0f] set];

    CGRect myRect = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
    CGContextFillRect(ctx, myRect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    CGContextRestoreGState(ctx);
    UIGraphicsEndImageContext();

    [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}

没门.工具栏始终为黑色.

任何线索？

谢谢.

Answer 1

您可以尝试使用纯灰色背景图像.您可以使用所需的颜色制作1x1像素的灰色png图像.然后使用以下代码将其设置为背景图像,它将适用于所有iOS版本,包括4.3及更低版本.

    UIToolbar *toolBar = //...your toolbar

    UIImage *toolbarBkg = [[UIImage imageNamed: @"toolbarBkg.png"] stretchableImageWithLeftCapWidth:0 topCapHeight:0];

    if ([toolBar respondsToSelector:@selector(setBackgroundImage:forToolbarPosition:barMetrics:)])
        [toolBar setBackgroundImage:toolbarBkg forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];
    else {
        UIImageView *background = [[UIImageView alloc] initWithImage:toolbarBkg];
        background.frame = toolBar.frame;
        [toolBar insertSubview:background atIndex:0];
    }