For flutter/flutter#164670

Instruction:

1. Drag MyShareExtensionDismissControlRecognizer.h and MyShareExtensionDismissControlRecognizer.m files into your extension target.

2. Add the recognizer to ShareViewController:

@implementation ShareViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  
  UIGestureRecognizer *recognizer = [[MyShareExtensionDismissControlRecognizer alloc] initWithDismissStrategy:MyShareExtensionSwipeDismissStrategyTopRegion];
  [self.view addGestureRecognizer:recognizer];

Dimiss strategy

• With MyShareExtensionSwipeDismissStrategyTopRegion, you can drag the top region of the sheet to dismiss it.
• With MyShareExtensionSwipeDismissStrategyProhibited, you can't dismiss the via gesture. Instead, you have to use a button.

Dismiss button

You can either add the button on native side or on flutter side.

1. To add the dismiss button on native side, you can simply use a navigation bar:

- (void)viewDidLoad {
  [super viewDidLoad];

  FlutterViewController *vc = [[FlutterViewController alloc] initWithProject:nil nibName:nil bundle:nil];
  UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
  [self addChildViewController:nav];
  [self.view addSubview:nav.view];
  nav.view.frame = self.view.bounds;
  
  vc.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Save" style:UIBarButtonItemStyleDone target:self action:@selector(saveButtonClicked)];
}
- (void)saveButtonClicked {
  NSLog(@"save button clicked");
  
  [self.extensionContext completeRequestReturningItems:nil completionHandler:^(BOOL expired) {
    NSLog(@"Dismissed");
  }];
}

2. To add the dismiss button on flutter side, you can use a method channel, and call the completeRequestReturningItems API.

Demo

Top Region

top_region.mp4

Dismiss button

dismiss_button.mp4

Top Region + Dismiss Button

both.mp4