How to UIActivityViewController excluded items dynamic based on a changing array?-CodePudding

I went through a tutorial for implementing the UIActivityViewController everything is working as expected. I can also use excludedItems property to remove any default options in UIActivityViewController. But now I want to make this code more dynamic. Actually my plan is that user can choose which options he can choose to omit or exclude from the UIActivityViewController . So for that I am planning to pass an array with some fixed keys and based on that keys I can define which items to included in excluded lists. Below is the sample code :

NSArray* excludedArray = [NSArray arrayWithObjects: @"Facebook", nil];
UIActivityViewController *controller = [[UIActivityViewController alloc]initWithActivityItems:items applicationActivities:nil];
if ( [excludedArray containsObject: @"Facebook"] ) {
    NSArray *excluded = @[UIActivityTypeMessage];
    controller.excludedActivityTypes = excluded;
}

Right now excludedArray only contains message string so based on that I added the UIActivityTypeMessage to excluded array . But tomorrow if the user adds more item to excludedArray for example print then based on that I must be able to add UIActivityTypePrint to excluded array. How to achieve that?

CodePudding user response：

Link UIActivityType enum values with the selection you'll give to user using switch case.
On select/deselect update the array.

At last pass the enum array to excludedActivityTypes.

  func getExcludedActivityTypes(stringArray: [String]) -> [UIActivity.ActivityType]{
  var excludeArray: [UIActivity.ActivityType] = []
  for str in stringArray
  {
      switch str
      { 
      case "messaging":
          excludeArray.append(.message)
          break
      case "postToTwitter":
          excludeArray.append(.postToTwitter)
          break

          // write others to exclude those types
      default:
          break
      }
  }

  return excludeArray}

Objective c - Alternative(you can use if else statement as objective c doesn't support strings for switch cases)

-(NSArray<UIActivityType>*)getExcludedActivityTypes:(NSArray<NSString*>*)stringArray {
NSMutableArray<UIActivityType> * excludeArray = @[].mutableCopy;

for(NSString * str in stringArray) {
    if([str isEqualToString:@"messaging"]){
        [excludeArray addObject:UIActivityTypeMessage];
    }
    
    else if([str isEqualToString:@"postToTwitter"]){
        [excludeArray addObject:UIActivityTypePostToTwitter];
    }
    // write others to exclude those types
}
return excludeArray;}