网络请求URL中有中文或转义符解决办法

NSString *encodedString = (NSString *)

CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,

(CFStringRef)urlString,

(CFStringRef)@"!$&'()*+,-./:;=?@_~%#[]",

NULL,

kCFStringEncodingUTF8));