stringByAddingPercentEscapesUsingEncoding

• 编码

NSString *hStr = @"你好啊";
NSString *hString = [hStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(@"hString === %@", hString);

输出结果:
hString === %E4%BD%A0%E5%A5%BD%E5%95%8A

• 解码

NSString *str3 =@"\u5982\u4f55\u8054\u7cfb\u5ba2\u670d\u4eba\u5458\uff1f";
NSString *str5 = [str3 stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
NSLog(@"str5 ==== %@",str5);

输出结果：
str5 ====如何联系客服人员？

stringByAddingPercentEncodingWithAllowedCharacters

• 编码

NSString *hStr =@"如何联系客服人员？";
NSString *hString = [hStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];

输出结果：
hString === %E4%BD%A0%E5%A5%BD%E5%95%8A

• 解码

NSString*str3 =@"\u5982\u4f55\u8054\u7cfb\u5ba2\u670d\u4eba\u5458\uff1f";
NSString*str5 = [str3 stringByRemovingPercentEncoding];
NSLog(@"str5 ==== %@",str5);

输出结果：
str5 ====如何联系客服人员？

原文章链接 ： https://www.jianshu.com/p/ccdb6b220ac4