如何从分段控件中删除边框

Question

如何删除分段控件的外边框？我已经将分频器图像设置为我想要的但现在要按照我的应用程序的模拟我需要一个没有外边框的分段控件.

Answer 1

您可以使用以下功能删除边框和分隔线.创建UISegmentedControl扩展:

对于Swift 3和4+:

extension UISegmentedControl {
    func removeBorders() {
        setBackgroundImage(imageWithColor(color: backgroundColor!), for: .normal, barMetrics: .default)
        setBackgroundImage(imageWithColor(color: tintColor!), for: .selected, barMetrics: .default)
        setDividerImage(imageWithColor(color: UIColor.clear), forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default)
    }

    // create a 1x1 image with this color
    private func imageWithColor(color: UIColor) -> UIImage {
        let rect = CGRect(x: 0.0, y: 0.0, width:  1.0, height: 1.0)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()
        context!.setFillColor(color.cgColor);
        context!.fill(rect);
        let image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        return image!
    }
}

对于Swift 2.2:

extension UISegmentedControl {
    func removeBorders() {
        setBackgroundImage(imageWithColor(backgroundColor!), forState: .Normal, barMetrics: .Default)
        setBackgroundImage(imageWithColor(tintColor!), forState: .Selected, barMetrics: .Default)
        setDividerImage(imageWithColor(UIColor.clearColor()), forLeftSegmentState: .Normal, rightSegmentState: .Normal, barMetrics: .Default)
    }

    // create a 1x1 image with this color
    private func imageWithColor(color: UIColor) -> UIImage {
        let rect = CGRectMake(0.0, 0.0, 1.0, 1.0)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()
        CGContextSetFillColorWithColor(context, color.CGColor);
        CGContextFillRect(context, rect);
        let image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        return image
    }
}

调用上面的功能.

segmentedControl.removeBorders()

参考:完全删除UISegmentedControl分隔符.(苹果手机)

感谢/sf/users/274504331/为Swift 3版本.

Answer 2

这是Sohil答案的第3版,可能对其他人有所帮助.它确实帮助了我.:)

extension UISegmentedControl {
func removeBorders() {
    setBackgroundImage(imageWithColor(color: backgroundColor!), for: .normal, barMetrics: .default)
    setBackgroundImage(imageWithColor(color: tintColor!), for: .selected, barMetrics: .default)
    setDividerImage(imageWithColor(color: UIColor.clear), forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default)
}

// create a 1x1 image with this color
private func imageWithColor(color: UIColor) -> UIImage {
    let rect = CGRect(x: 0.0, y: 0.0, width:  1.0, height: 1.0)
    UIGraphicsBeginImageContext(rect.size)
    let context = UIGraphicsGetCurrentContext()
    context!.setFillColor(color.cgColor);
    context!.fill(rect);
    let image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image!
    }
}

Answer 3

希望它会帮助某人

斯威夫特 - 4

使Segment控件的背景颜色和色调颜色为相同颜色.然后"设置分段控件的titleTextAttributes"

    segmentedControl.tintColor = UIColor.red
    segmentedControl.backgroundColor = UIColor.red
    let attributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
    segmentedControl.setTitleTextAttributes(attributes, for: .normal)
    segmentedControl.setTitleTextAttributes(attributes, for: .selected)