Adding NSData to a NSData Byte Array

Question

I want to add an image to a byte array. The following code gives me an error. I think i have not done it correctly.

Error

Field has incomplete type 'NSData *__strong[]'

In the .m file

@interface MyViewController() {

    NSData *byteArray[];

}

inside the method

NSData *imgD = UIImageJPEGRepresentation(img1, 0.1);

NSData *imgD2 = UIImageJPEGRepresentation(img2, 0.1);        

NSData *imgD3 = UIImageJPEGRepresentation(img13, 0.1);

 [byteArray addObject:imgD];

 [byteArray addObject:imgD2];

 [byteArray addObject:imgD3];

possible duplicate of How to create byte array from NSData

Razvan
– Razvan

2015-05-11 08:21:28 +00:00
Commented May 11, 2015 at 8:21 — Razvan
– Razvan, Commented May 11, 2015 at 8:21

V.J. · Accepted Answer · 2015-05-11 08:39:05Z

1

You can add an image to an array. Use NSMutableArray instead of NSData*[].

In the .m file

@interface MyViewController() {    
    NSMutableArray *byteArray;    
}

inside the method

byteArray = [[NSMutableArray alloc] init];   
NSData *imgD = UIImageJPEGRepresentation(img1, 0.1);    
NSData *imgD2 = UIImageJPEGRepresentation(img2, 0.1);            
NSData *imgD3 = UIImageJPEGRepresentation(img13, 0.1);

[byteArray addObject:imgD]; 
[byteArray addObject:imgD2];
[byteArray addObject:imgD3];

edited May 11, 2015 at 8:39

answered May 11, 2015 at 8:30

V.J.

9,6004 gold badges36 silver badges50 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

gnasher729 Over a year ago

Please follow Objective-C coding conventions. Instance variables should always start with an underscore, not doing so is the cause of countless errors haunting beginners. And it would be better to make byteArray a property, not an instance variable.

Collectives™ on Stack Overflow

Adding NSData to a NSData Byte Array

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related