iOS encodeURIComponent 如何实现

问题：

把网址作为http get 参数时，需要把网址进行 encodeURIComponent ：

如： let url=”http://m.news.baidu.com/news?fr=mohome&ssid=0&from=1014702t&uid=&pu=sz42001″

let ret=encodeURIComponent(url) // ret:

http%3A%2F%2Fm.news.baidu.com%2Fnews%3Ffr%3Dmohome%26ssid%3D0%26from%3D1014702t%26uid%3D%26pu%3Dsz42001

解决：

extension String{
    func encodeURIComponent()->String{
        let set=NSMutableCharacterSet();
        set.formUnionWithCharacterSet(NSMutableCharacterSet.alphanumericCharacterSet())
        set.formUnionWithCharacterSet(NSMutableCharacterSet(charactersInString:"-_.!~*'()"))
        let ret = self.stringByAddingPercentEncodingWithAllowedCharacters(set)!
        return ret
    }
}

extension String{

func encodeURIComponent()->String{

let set=NSMutableCharacterSet();

set.formUnionWithCharacterSet(NSMutableCharacterSet.alphanumericCharacterSet())

set.formUnionWithCharacterSet(NSMutableCharacterSet(charactersInString:"-_.!~*'()"))

let ret = self.stringByAddingPercentEncodingWithAllowedCharacters(set)!

return ret

}

参考：

http://www.cnblogs.com/snandy/archive/2013/01/14/2859883.html

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iOS encodeURIComponent 如何实现

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