正如@Krumelur 建议的那样,该CFURLCreateStringByAddingPercentEscapes
函数可以为您的字符串进行 URL 编码。这是代码。
static NSString * CTPercentEscapedQueryStringValueFromStringWithEncoding(NSString *string, NSStringEncoding encoding) {
return (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (__bridge CFStringRef)string, NULL, (__bridge CFStringRef)kCharactersToBeEscapedInQueryString, CFStringConvertNSStringEncodingToEncoding(encoding));
}
和完整的解决方案
:要从参数中获取编码的 url,请使用以下代码。
/**
get parameterized url from url and query parameters.
*/
+(NSString *)getParameterizedUrl:(NSString *)url withParameters:(NSDictionary *)queryDictionary
{
NSMutableArray *mutablePairs = [NSMutableArray array];
for (NSString *key in queryDictionary) {
[mutablePairs addObject:[NSString stringWithFormat:@"%@=%@", CTPercentEscapedQueryStringKeyFromStringWithEncoding(key, NSUTF8StringEncoding), CTPercentEscapedQueryStringValueFromStringWithEncoding(queryDictionary[key], NSUTF8StringEncoding)]];
}
return [[NSString alloc]initWithFormat:@"%@?%@",url,[mutablePairs componentsJoinedByString:@"&"]];
}
static NSString * const kCharactersToBeEscapedInQueryString = @":/?&=;+!@#$()',*";
static NSString * CTPercentEscapedQueryStringKeyFromStringWithEncoding(NSString *string, NSStringEncoding encoding) {
static NSString * const kCharactersToLeaveUnescapedInQueryStringPairKey = @"[].";
return (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (__bridge CFStringRef)string, (__bridge CFStringRef)kCharactersToLeaveUnescapedInQueryStringPairKey, (__bridge CFStringRef)kCharactersToBeEscapedInQueryString, CFStringConvertNSStringEncodingToEncoding(encoding));
}
static NSString * CTPercentEscapedQueryStringValueFromStringWithEncoding(NSString *string, NSStringEncoding encoding) {
return (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (__bridge CFStringRef)string, NULL, (__bridge CFStringRef)kCharactersToBeEscapedInQueryString, CFStringConvertNSStringEncodingToEncoding(encoding));
}
并在您的代码中使用
NSString *url = [self getParameterizedUrl:@"http://www.example.com" withParameters:self.params];
注意:这里的参数是字典。