Question

是否有可能在iOs 9 +中使用多行文本制作UISegmentedControl？

到目前为止，我已尝试过：

来自SO主题的变体： This, this and this one

制作扩展名：

extension UISegmentedControl
{
    func makeMultiline(numberOfLines: Int)
    {
        for segment in self.subviews
        {
            let labels = segment.subviews.filter { $0 is UILabel }  // [AnyObject]
            labels.map { ($0 as UILabel).numberOfLines = numberOfLines }    
        }
    }
}

从UISegmentedControl继承并在Identity Inspector中将新类设置为SegmentedControl

class MultilineSegmentedControl: UISegmentedControl
{
    override func didMoveToSuperview()
    {
        for segment in subviews
        {
            for subview in segment.subviews
            {
                if let segmentLabel = subview as? UILabel
                {
                    segmentLabel.numberOfLines = 2
                }
            }
        }
    }
}

使用文本而不是标题设置图像，并在
中更改UISegmentedControl的框架
```
viewDidLayoutSubviews()
```
方法。它使UISegmentedControl的高度更大，但是图像保持它的高度，好像UISegmentedControl没有放大，并且在第一次交互时UISegmentedControl缩小到它的默认高度。

Answer 1

也许这有点晚了但是这是我的子类来解决swift 3中的这个问题：

@IBDesignable class MySegmentedControl: UISegmentedControl {

    @IBInspectable var height: CGFloat = 29 {
        didSet {
            let centerSave = center
            frame = CGRect(x: frame.minX, y: frame.minY, width: frame.width, height: height)
            center = centerSave
        }
    }

    @IBInspectable var multilinesMode: Bool = false

    override func layoutSubviews() {
        super.layoutSubviews()
        for segment in self.subviews {
            for subview in segment.subviews {
                if let segmentLabel = subview as? UILabel {
                    segmentLabel.frame = CGRect(x: 0, y: 0, width: segmentLabel.frame.size.width, height: segmentLabel.frame.size.height * 1.6)
                    if (multilinesMode == true)
                    {
                        segmentLabel.numberOfLines = 0
                    }
                    else
                    {
                        segmentLabel.numberOfLines = 1
                    }
                }
            }
        }
    }

}

Answer 2

尝试以下代码，找出所有segmentedControl子UILabel并设置numberOfLines。

for segmentViews in segmentedControl.subviews {
    for segmentLabel in segmentViews.subviews {
        if segmentLabel is UILabel {
            (segmentLabel as! UILabel).numberOfLines = 0
        }
    }
}

UISegmentedControl文本有多行

2 个答案: