NSString *name = @"你好啊";
NSString *string = [NSString stringWithFormat:@"%@",name];
string = [string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(@"%@",string);
这是个简单的UTF8转码的小Demo
原文：http://www.cnblogs.com/darain0212/p/4607433.html
