];
NSString->NSData
NSString *aString = @"1234abcd";
NSData *aData = [aString dataUsingEncoding: NSUTF8StringEncoding...];
2.NSData 与 Byte
NSData-> Byte数组
NSString *testString = @"1234567890";
NSData *testData = [testString...Byte byte[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23};
NSData *adata = [[NSData...*newData = [[NSData alloc] initWithBytes:bytes length:128];
NSLog(@"newData=%@",newData);
NSData 与...];
UIImage-> NSData
NSData *imageData = UIImagePNGRepresentation(aimae);