Make animation work before changing view Objective-C - objective-c

Question

I have some questions. I'm a total novice to Objective-c and Xcode's development.
My problem is the following:
I have a button with an IBActions (cambia view) and an Outlet (gioca_outlet).
This button is connected to another view by the "Show", so when I press the next view appears.
But, before changing view I'd like to commit animations with the button, which has its own image.
I'd like to scale the button's image size (maintaining the same center) for 1/2 seconds, then show the second view.
I'd also like the button's size to be the initial one when I skip back to the main view.
So, I came up with this code:
- (IBAction)cambiaview:(id)sender {
[UIView animateWithDuration:2.0 delay:0.4 options:UIViewAnimationOptionTransitionCrossDissolve animations:{
[_gioca_outlet setCenter:CGPointMake([_gioca_outlet.center].x + 0.0001, [_gioca_outlet.center].y +0.0001)];
[_gioca_outlet setTransform:CGAffineTransformScale(_gioca_outlet.transform, 2.0, 2.0)];}
completion:^(BOOL finished) {
};
}
Back button, to return to the main view:
- (IBAction)back:(id)sender {
[self dismissViewControllerAnimated:YES completion:^{ //
}];
}
Thanks.

Answer 1

Open Interface Builder and delete all existing connections between two view controllers.
Then ctrl+drag from first view controller to the second and choose "Show" option.
step 1
After that click on the created connection (it's called segue), switch to Attributes Inspector and give it an ID step 2
In the completion block of your animation write [self performSegueWithIdentifier:#"showNextView"];

Answer 2

You have connected the button's action segue with the second view, so as soon as you clicked on the button, next view appears. Instead, you connect a segue from viewcontroller1 to viewcontroller2 and give an identifier to your segue.
Then on button's click event, add this code.
- (IBAction)cambiaview:(id)sender
[UIView animateWithDuration:0.8 animations:^{
//this will transform your button to grow a little bit bigger
_gioca_outlet.transform = CGAffineTransformMakeScale(1.5, 1.5);
}completion:^(BOOL finished) {
//push from viewcontroller1 to viewcontroller2 using you segue identifier
[self performSegueWithIdentifier:#"vc1tovc2segue" sender:self]
}];
This code will make your button a little bit bigger animatedly and then pushes to second view controller.
Now, if you want to play an audio, you can play it in second view controller's viewDidLoad method using AVFoundation framework.
To play the sound file do the following:
Add your sound file in your projects directory.
Import AVFoundation framework by writing,
#import <AVFoundation/AVFoundation.h>
Create a strong property of AVAudioPlayer in .h of your viewcontroller2.
#property (strong, nonatomic) AVAudioPlayer *player;
Then in viewcontroller2's viewDidLoad add this code to play the audio file,
- (void)viewDidLoad {
[super viewDidLoad];
//SampleAudio is your audio file name and mp3 is your extension.
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:#"SampleAudio" ofType:#"mp3"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error:nil];
self.player.delegate = self;
[self.player play];
}
To make the button's size normal when you come back to your first view controller, add this code in your first view controller:
-(void)viewWillAppear:(BOOL)animated
{
_gioca_outlet.transform = CGAffineTransformIdentity;
}
Hope this helps.
If you face any problem understanding anything, feel free to leave a comment. :)