ios开发之--NSDictionary和NSData之间的互转/NSString和NSData之间的互转

NSDictionary转NSData，代码如下：

+(NSData*)returnDataWith:(NSDictionary*)dict
{
    NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];

    return data;
}

NSData转NSDictionary，代码如下：

+(NSDictionary*)returnDictionaryWithDataPath:(NSData*)data
{
    NSString *receiveStr = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

    NSData * datas = [receiveStr dataUsingEncoding:NSUTF8StringEncoding];

    NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:datas options:NSJSONReadingMutableLeaves error:nil];

    return jsonDict;
}

NSData转NSString，代码如下：

NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];  

NSString转NSData，代码如下：

NSData *data = [@"test" dataUsingEncoding:NSUTF8StringEncoding];  

仅做记录！