[iOS] Objective-c save/load image under APP document

Objective-c save/load image under APP document

Save image: 

   [self saveImageInDocumenet:Image withName:@"blue"];

Load image with name: 

   UIImage *image = [self loadImageFromDocumentWithName:@"blue"];

- (void)saveImageInDocumenet:(UIImage *)image withName:(NSString *)name {

    

    if (image != nil) {

        

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,

                                                             NSUserDomainMask, YES);

        NSString *documentsDirectory = [paths objectAtIndex:0];

        NSString* path = [documentsDirectory stringByAppendingPathComponent:name];

        NSData* data = UIImagePNGRepresentation(image);

        [data writeToFile:path atomically:YES];

    }

}

[iOS] Objective-c NSString to Hex string

Objective-c NSString to Hex string

NSData *data = [self parseMacAddress:@"AABBCCDDEEFF "];

NSLog(@"After transfer: %@", data); 

= > AABBCCDDEEFF (Hex)