iOS 获取字符在TextView中的位置

使用NSLayoutManager的这个API，传入字符在整个文本的NSRange，和当前TextView的textContainer。
open func boundingRect(forGlyphRange glyphRange: NSRange, in container: NSTextContainer) -> NSRect

简单示例

let str = "123321123"
let ranges = getPatternRangeArr(pattern: "123", content: str)

for i in 0..<ranges.count {
   let r = ranges[i]
   let rect = textView.layoutManager.boundingRect(forGlyphRange: r, in: textView.textContainer)
}

获取字符NSRange的方法

func getPatternRangeArr(pattern: String,content: String) -> [NSRange] {
    var ranges:[NSRange] = []
    do {
        let regular = try NSRegularExpression(pattern: pattern,options: .caseInsensitive)
        let results = regular.matches(in: content,options: .reportProgress, range: NSRange(location: 0, length: content.count))
        for r in results {
            ranges.append(r.range)
        }
    } catch {
        print(error)
    }
        
    return ranges
}