【问题】
将旧的swift代码，转换到最新的swift的语法：
if let encoded = urlVal.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding) {
if let u = NSURL(string: encoded) {
return self.requestSerializer.createRequest(u, method: method, parameters: parameters)
}
}代码出错：
/Users/crifan/dev/dev_root/xxx/projects/xxx/ios/ios/ios/xxx/model/network/HTTPTask.swift:390:33: ‘stringByAddingPercentEscapesUsingEncoding’ is deprecated: Use stringByAddingPercentEncodingWithAllowedCharacters(_:) instead, which always uses the recommended UTF-8 encoding, and which encodes for a specific URL component or subcomponent since each URL component or subcomponent has different rules for what characters are valid.
如图：
【解决过程】
1.搜：
stringByAddingPercentEscapesUsingEncoding is deprecated Use stringByAddingPercentEncodingWithAllowedCharacters(_:) instead
参考：
在吐槽，升级Xcode7之后，一堆新语法建议和转换，很是麻烦。
ios – Replacement for stringByAddingPercentEscapesUsingEncoding in ios9? – Stack Overflow
算了，好像看不出啥就按照建议去修改吧。
2.直接替换：
if let encoded = urlVal.stringByAddingPercentEncodingWithAllowedCharacters(NSUTF8StringEncoding) {结果又出错：
| HTTPTask.swift:390:84: Cannot convert value of type ‘UInt’ to expected argument type ‘NSCharacterSet’ |
算了，去找找：
stringByAddingPercentEncodingWithAllowedCharacters
看看语法是啥，如何使用。
搜：
stringByAddingPercentEncodingWithAllowedCharacters
stringbyaddingpercentencodingwithallowedcharacters example
参考：
An example of populating a HTTPBody of NSMutableURLRequest for GitHub
用法是：
let characterSet = NSMutableCharacterSet.alphanumericCharacterSet()
characterSet.addCharactersInString("-._~")
return stringByAddingPercentEncodingWithAllowedCharacters(characterSet)参考：
ios – How to encode a URL in Swift – Stack Overflow
和上面的：
ios – Replacement for stringByAddingPercentEscapesUsingEncoding in ios9? – Stack Overflow
应该改为：
if let encoded = urlVal.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLHostAllowedCharacterSet()) {期间，xcode中可以自动提示对应的函数和属性：
不过修改之后，点击进去看看最新代码实现。
【总结】
后来，又暂时放下，不去折腾了。
有空再继续。
转载请注明：在路上 » 【未解决】stringByAddingPercentEscapesUsingEncoding is deprecated Use stringByAddingPercentEncodingWithAllowedCharacters(_:) instead