本文主要介绍IOS中对Url进行编码和解码示例，具体如下：

1.非ARC模式下

+ (NSString *)encodeToPercentEscapeString: (NSString *) input { // Encode all the reserved characters, per RFC 3986 // () NSString *outputStr = (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,(CFStringRef)input,NULL,(CFStringRef)@"!*'();:@&=+$,/", kCFStringEncodingUTF8); return outputStr; } + (NSString *)decodeFromPercentEscapeString: (NSString *) input { NSMutableString *outputStr = [NSMutableString stringWithString:input]; [outputStr replaceOccurrencesOfString:@"+" withString:@" " options:NSLiteralSearch range:NSMakeRange(0, [outputStr length])]; return [outputStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

2. ARC模式下

- (NSString *)encodeToPercentEscapeString: (NSString *) input{ NSString* outputStr = (__bridge NSString *)CFURLCreateStringByAddingPercentEscapes( NULL, /* allocator */ (__bridge CFStringRef)input, NULL, /* charactersToLeaveUnescaped */ (CFStringRef)@"!*'();:@&=+$,/", kCFStringEncodingUTF8); return outputStr;}- (NSString *)decodeFromPercentEscapeString: (NSString *) input {NSMutableString *outputStr = [NSMutableString stringWithString:input];[outputStr replaceOccurrencesOfString:@"+"withString:@" "options:NSLiteralSearchrange:NSMakeRange(0, [outputStr length])];return [outputStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持查字典教程网。