Simply use that code make make delete button as destructiveButton
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Are you sure you want to delete this backup?" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Delete Backup" otherButtonTitles:nil,nil];
actionSheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
[actionSheet showInView:self.view];
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solved How to create action sheet Delete in IOS [closed]