NSData 相關總結

1.NSData 轉 NSDictionary

+(NSDictionary*)returnDicWithData:(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;
}

2.NSData 和 NSString 互轉

1)NSData轉NSString

str  =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

 

2)NSString轉NSData

NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];