iOS UTF-8、URL解码与转码

最新推荐文章于 2023-09-11 09:00:00 发布

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最新推荐文章于 2023-09-11 09:00:00 发布

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分类专栏： iOS 文章标签： url utf-8 转码解码

本文链接：https://blog.youkuaiyun.com/lzhgxiaoxiong/article/details/47272927

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本文主要探讨了iOS中UTF-8的解码与转码操作，包括如何进行UTF-8编码和解码，以及URL编码和非ARC环境下的URL解码实践。

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UTF-8解码

NSString* str= [@"%E4%B8%AD%E5%9B%BD" stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSLog(@"strAfterDecodeByUTF8AndURI=%@", str);

UTF-8转码

[@"我是中文" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

URL编码

非ARC

+(NSString *)getUrlStringFromString:(NSString *)aStr{
NSString *outputStr = (NSString *)
CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(CFStringRef)aStr,
NULL,
(CFStringRef)@"!*'();:@&=+$,/?%#[]",
kCFStringEncodingUTF8);
return outputStr;
}

ARC

+(NSString *)getUrlStringFromString:(NSString *)urlStr{
    NSString *outputStr = (__bridge NSString *)
    CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                            (__bridge CFStringRef)urlStr,
                                            NULL,
                                            (CFStringRef)@"!*'();:@&=+$,/?%#[]",
                                            kCFStringEncodingUTF8);
    return outputStr;
}

URL解码

+ (NSString *)decodeFromPercentEscapeString: (NSString *) urlStr
{
    NSMutableString *outputStr = [NSMutableString stringWithString:urlStr];
    [outputStr replaceOccurrencesOfString:@"+"
                               withString:@""
                                  options:NSLiteralSearch
                                    range:NSMakeRange(0,
                                                      [outputStr length])];
    
    return [outputStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}