ios 字典or数组与json串互转

话不多说,直接上代码...

#pragma mark -字典转换成json串
- (NSString *)dictionaryToJsonString:(NSDictionary *)dict{
    
    NSError *parseError = nil;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:&parseError];
    
    return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    
}
#pragma mark -数组转换成json串
- (NSString *)arrayToJsonString:(NSArray *)array{
    
    NSError *error = nil;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:array options:NSJSONWritingPrettyPrinted error:&error];
    
    return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];;
}



#pragma mark -json串转换成字典
- (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString {
    
    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;
}

#pragma mark -json串转换成数组
- (id)arrayWithJsonString:(NSString *)jsonString{
    
    if (jsonString == nil) {
        return nil;
    }
    
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    NSError *err;
    NSArray *arr = [NSJSONSerialization JSONObjectWithData:jsonData
                                                    options:NSJSONReadingMutableContainers
                                                    error:&err];
    
    if(err) {
        NSLog(@"json解析失败：%@",err);
        return nil;
    }
    return arr;
    
}

// 将字典或者数组转化为JSON串
+ (NSData *)toJSONData:(id)theData
{
    NSError *error = nil;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:theData options:NSJSONWritingPrettyPrinted error:nil];
    
    if ([jsonData length]&&error== nil){
        return jsonData;
    }else{
        return nil;
    }
}


// 将JSON串转化为字典或者数组
+ (id)toArrayOrNSDictionary:(NSData *)jsonData{
    
    NSError *error = nil;
    id jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    
    if (jsonObject != nil && error == nil){
        return jsonObject;
    }else{
        // 解析错误
        return nil;
    }
    
}