iOS 字典与字符串的相互转换

<pre name="code" class="objc"><span style="font-family: Arial, Helvetica, sans-serif;">//字符串转字典
+ (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString {</span>

if (jsonString == nil) {

return nil;

}

NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSError *err;

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData

options:NSJSONReadingMutableContainers

error:&err];

if(err) {

NSLog(@"json解析失败：%@",err);

return nil;

}

return dic;

}

//字典转字符串
+ (NSString*)dictionaryToJson:(NSDictionary *)dic

{

NSError *parseError = nil;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

}