Xcode Objective C: Locking Landscape in a Toolbar after a gesture

I want to create a toolbar that has a locking landscape method and an unlock. How can I go about this?
I also just want it to display after a swipe gesture. I have the swipe gesture figured out but having trouble figuring out how to lock landscape after the user presses the button.
It’s a app that has autorotate and want to keep it until the user wants to lock landscape. Where should I call or create this method? Do I need create another UIViewController and call it in the main one?

1 Answer
1

You can override shouldAutorotate method on the UIViewController.

https://developer.apple.com/documentation/uikit/uiviewcontroller/1621419-shouldautorotate?changes=_3&language=objc

Here is the sample ViewController with one button to lock/unlock rotation.

@interface ViewController (){
bool rotationLocked;
}

@property (weak, nonatomic) IBOutlet UIButton *lockButton;

@end

@implementation ViewController

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


- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (IBAction)togleRotationLock:(id)sender {
rotationLocked = !rotationLocked;
if (rotationLocked)
[_lockButton setTitle:@"Ulock Rotation" forState:UIControlStateNormal];
else
[_lockButton setTitle:@"Lock Rotation" forState:UIControlStateNormal];
}

- (bool)shouldAutorotate{
return !rotationLocked;
}

@end


Additionally you can override the supportedInterfaceOrientations if you need to set specific orientation.

https://developer.apple.com/documentation/uikit/uiviewcontroller/1621435-supportedinterfaceorientations?changes=_3&language=objc

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.