Question

我试图在Mac和iPad上实现像Safari一样的效果，使用导航栏和当前标签。如何扩展UINavigationBar / UIToolbar以与UIView子类合并为1？

答案：

我创建了自己的UIToolbar子类，并使用drawRect:(CGRect)rect方法使UIToolbar与我的UIView子类只有那种颜色相同。

    - (void)drawRect:(CGRect)rect
{
    // Drawing code
    //// General Declarations
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGContextRef context = UIGraphicsGetCurrentContext();

    //// Color Declarations
    UIColor* gradientColor = [UIColor colorWithRed: 0.916 green: 0.916 blue: 0.916 alpha: 1];
    UIColor* gradientColor2 = [UIColor colorWithRed: 0.811 green: 0.811 blue: 0.811 alpha: 1];

    //// Gradient Declarations
    NSArray* gradientColors = [NSArray arrayWithObjects:
                               (id)gradientColor.CGColor,
                               (id)gradientColor2.CGColor, nil];
    CGFloat gradientLocations[] = {0, 1};
    CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)gradientColors, gradientLocations);

    //// Rectangle Drawing
    UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRect: CGRectMake(-1, 0, 769, 45)];
    CGContextSaveGState(context);
    [rectanglePath addClip];
    CGContextDrawLinearGradient(context, gradient, CGPointMake(383.5, -0), CGPointMake(383.5, 45), 0);
    CGContextRestoreGState(context);


    //// Cleanup
    CGGradientRelease(gradient);
    CGColorSpaceRelease(colorSpace);
}

Answer 1

这是一个具有自定义外观的自定义控件。将UIImageViews与可伸缩的UIImages一起使用，并在PNG图像中重新创建GUI。或使用Core Graphics渲染选项卡的外观。（PaintCode可能对此有帮助。）

Answer 2

我创建了自己的UIToolbar子类，并使用了drawRect：（CGRect）rect方法使UIToolbar与我的UIView子类只有那种颜色相同。

    - (void)drawRect:(CGRect)rect
{
    // Drawing code
    //// General Declarations
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGContextRef context = UIGraphicsGetCurrentContext();

    //// Color Declarations
    UIColor* gradientColor = [UIColor colorWithRed: 0.916 green: 0.916 blue: 0.916 alpha: 1];
    UIColor* gradientColor2 = [UIColor colorWithRed: 0.811 green: 0.811 blue: 0.811 alpha: 1];

    //// Gradient Declarations
    NSArray* gradientColors = [NSArray arrayWithObjects:
                               (id)gradientColor.CGColor,
                               (id)gradientColor2.CGColor, nil];
    CGFloat gradientLocations[] = {0, 1};
    CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)gradientColors, gradientLocations);

    //// Rectangle Drawing
    UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRect: CGRectMake(-1, 0, 769, 45)];
    CGContextSaveGState(context);
    [rectanglePath addClip];
    CGContextDrawLinearGradient(context, gradient, CGPointMake(383.5, -0), CGPointMake(383.5, 45), 0);
    CGContextRestoreGState(context);


    //// Cleanup
    CGGradientRelease(gradient);
    CGColorSpaceRelease(colorSpace);
}

如何将UIToolbar扩展到其他对象，如safari

2 个答案: