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Monday 27 February 2012

MediaPlayer Framework


In this post we will have a look at the MediaPlayer framework but before beginning I would like you to have a look at the AVFoundatioin framework post which will explain you how to add a framework into your current project, read that post first if you are a beginner else continue reading.


Design Phase: In this post we will try to run a video on the button touch and that video will be displayed in the iphone simulator, here's a look at the final output





Step 1: Open Xcode create a window based application project add a UIViewController subclass file and name it Myview, now you must be having two files into your class folder that’s Myview.h and Myview.m so now its time to add a video into the project
Refer AVFoundation post for this as well


Step 2: Now once you have added the MediaPlayer framework and a video file into your project its time to code now, declare an object of UIButton in the .h file of Myview also declare a function called PlayMovie which will play the movie for you. 
(download any .mp4 file and name the file as TAJ.mp4 ,as we have named the file in the code below).
Here's how the code looks

@interface Myview : UIViewController {

UIButton *btn;
}
-(void) PlayMovie;

@end




Step 3: Select the .m file of Myview and allocate memory for the UIButton object into the init method,

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        // Custom initialization
//setting the button type
btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
//setting the button frame
[btn setFrameCGRectMake(105997237)];
//setting the title for the button
[btn setTitle:@"Play" forState:UIControlStateNormal];
//adding function to the button
[btn addTarget:self action:@selector(PlayMovie)forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

now its time to give body to the PlayMovie function here’s the code for that

-(void) PlayMovie
{
//specifying the location of the video file
NSURL *movieurl = [NSURL fileURLWithPath:[[NSBundlemainBundle]pathForResource:@"TAJ" ofType:@"mp4"]];
//creating the object of MPMoviePlayerController and suppling the URL of the file to the object of the movie player controller

MPMoviePlayerController *movieplayerController = [[MPMoviePlayerControlleralloc]initWithContentURL:movieurl];
//play the movie

[movieplayerController play];

}




Code Explanation: In the above code we have created the object of the MediaPlayerController and this class has a init method which takes a parameter of NSURL so in the NSURL object called movieurl I have supplied the location of the video file which is present into the bundle (groups & files) with the help of NSBundle class.

Step 4: Go to the loadView method present into the .m file of the Myview and add the Button view to the current view 


- (void)loadView {
[super loadView];
[self.view addSubview:btn];
}

after that go to the AppDelegate.m file of your project and add the current view to your iPhone window

#import "VideProjectAppDelegate.h"
#import "Myview.h"

@implementation VideProjectAppDelegate

@synthesize window;


- (void)applicationDidFinishLaunching:(UIApplication *)application {    

    // Override point for customization after application launch

Myview * obj = [[Myview alloc]init];
[window addSubview:obj.view];
        [window makeKeyAndVisible];
}






Step 5: Press Build and Go and get the following output






I hope this post was helpful for you 

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