这段代码
var textSearch="hi"
var textToShow="hi hihi hi"
var rangeToColor = (textToShow as NSString).rangeOfString(textSearch)
var attributedString = NSMutableAttributedString(string:textToShow)
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.yellowColor() , range: rangeToColor)
TextView.attributedText=attributedString
给我 NSRange 来为 TextView 中的字符串着色。 问题是我只返回第一次出现。 如果单词包含“hi hihi hi”,则只有第一个“hi”是彩色的。 我怎样才能得到所有出现的字符串?
最佳答案
swift 5
let attrStr = NSMutableAttributedString(string: "hi hihi hey")
let inputLength = attrStr.string.count
let searchString = "hi"
let searchLength = searchString.characters.count
var range = NSRange(location: 0, length: attrStr.length)
while (range.location != NSNotFound) {
range = (attrStr.string as NSString).range(of: searchString, options: [], range: range)
if (range.location != NSNotFound) {
attrStr.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.yellow, range: NSRange(location: range.location, length: searchLength))
range = NSRange(location: range.location + range.length, length: inputLength - (range.location + range.length))
}
}
swift 3
let attrStr = NSMutableAttributedString(string: "hi hihi hey")
let inputLength = attrStr.string.characters.count
let searchString = "hi"
let searchLength = searchString.characters.count
var range = NSRange(location: 0, length: attrStr.length)
while (range.location != NSNotFound) {
range = (attrStr.string as NSString).range(of: searchString, options: [], range: range)
if (range.location != NSNotFound) {
attrStr.addAttribute(NSForegroundColorAttributeName, value: UIColor.yellow(), range: NSRange(location: range.location, length: searchLength))
range = NSRange(location: range.location + range.length, length: inputLength - (range.location + range.length))
}
}
swift 2
let attrStr = NSMutableAttributedString(string: "hi hihi hey")
let inputLength = attrStr.string.characters.count
let searchString = "hi"
let searchLength = searchString.characters.count
var range = NSRange(location: 0, length: attrStr.length)
while (range.location != NSNotFound) {
range = (attrStr.string as NSString).rangeOfString(searchString, options: [], range: range)
if (range.location != NSNotFound) {
attrStr.addAttribute(NSForegroundColorAttributeName, value: UIColor.yellowColor(), range: NSRange(location: range.location, length: searchLength))
range = NSRange(location: range.location + range.length, length: inputLength - (range.location + range.length))
}
}
关于ios - 在 swift 中为所有出现的字符串着色,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27180184/