MJPEG player on iOS

MJPEGViewController.m

#import "MJPEGViewController.h"

@interface MJPEGViewController ()
- (IBAction)reloadTouched:(id)sender;
@property (weak, nonatomic) IBOutlet UIView *connectedView;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@property( strong, nonatomic) NSMutableData *buffer;
@property(strong, nonatomic) NSURLConnection *conn;
@end

@implementation MJPEGViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void) play {
  NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.12.1:8080/?action=stream"]];
  self.conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
  self.buffer = [NSMutableData data];
}

- (void) stop {
  [self.conn cancel];
  self.connectedView.backgroundColor = [UIColor redColor];
}

- (void) viewWillAppear:(BOOL)animated {
  [self play];
}

- (void)viewDidDisappear:(BOOL)animated {
  [self stop];
}

- (IBAction)reloadTouched:(id)sender {
  [self stop];
  [self play];
}

- (void) connection:(NSURLConnection *)connection didFailWithError:(nonnull NSError *)error {
  self.connectedView.backgroundColor = [UIColor redColor];
  self.buffer = nil;
  self.imageView.image = nil;
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
  [self.buffer appendData:data];
  self.connectedView.backgroundColor = [UIColor greenColor];
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
  UIImage *img = [UIImage imageWithData:self.buffer];
  self.imageView.image = img;
  [self.buffer setLength:0];
}