url encode

最新推荐文章于 2021-05-18 23:09:42 发布

原创最新推荐文章于 2021-05-18 23:09:42 发布 · 5.2k 阅读

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本文介绍了一个自定义的URL编码方法，该方法通过特定字符的转义处理，实现了字符串的URL安全转换。文章详细解释了如何使用NSString进行百分比转义，并提供了一段Objective-C代码示例，展示了如何对特殊字符进行替换以符合URL规范。

-(NSString*)URLencode:(NSString *)originalString
        stringEncoding:(NSStringEncoding)stringEncoding {
    //!  @  $  &  (  )  =  +  ~  `  ;  '  :  ,  /  ?
    //%21%40%24%26%28%29%3D%2B%7E%60%3B%27%3A%2C%2F%3F
    NSArray *escapeChars = @[@";" , @"/" , @"?" , @":" ,
                            @"@" , @"&" , @"=" , @"+" ,    @"$" , @"," ,
                            @"!", @"'", @"(", @")", @"*"];

    NSArray *replaceChars = @[@"%3B" , @"%2F", @"%3F" , @"%3A" ,
                             @"%40" , @"%26" , @"%3D" , @"%2B" , @"%24" , @"%2C" ,
                             @"%21", @"%27", @"%28", @"%29", @"%2A"];

    int len = [escapeChars count];

    NSMutableString *temp = [[originalString
                              stringByAddingPercentEscapesUsingEncoding:stringEncoding]
                             mutableCopy];

    int i;
    for (i = 0; i < len; i++) {

        [temp replaceOccurrencesOfString:[escapeChars objectAtIndex:i]
                              withString:[replaceChars objectAtIndex:i]
                                 options:NSLiteralSearch
                                   range:NSMakeRange(0, [temp length])];
    }

    NSString *outStr = [NSString stringWithString: temp];

    return outStr;
}