NSString *urlString = @"此处输入网址";
NSString* encodedString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *urlString = @"此处输入网址";
NSString* encodedString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];