iOS调用系统空间实现弹窗

1.首先创建vc,并且重新系统方法

- (CGSize)preferredContentSize{

    

    if (self.presentingViewController && self.tableView != nil ) {

        

        CGSize size = self.presentingViewController.view.bounds.size;

        size.width = 200;

        

        CGSize size1 = [self.tableView sizeThatFits:size];

        

        return size1;

    }else{

        

        return [super preferredContentSize];

    }

    

    

}

2.在调用的页面直接初始化即可

 TestNewViewController *test = [[TestNewViewController alloc]init];

    test.modalPresentationStyle = UIModalPresentationPopover;

    test.popoverPresentationController.barButtonItem = self.navigationItem.rightBarButtonItem;

    test.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp;

    test.popoverPresentationController.delegate = self;

    [self presentViewController:test animated:YES completion:nil];

3.在这里需要遵循协议,

UIPopoverPresentationControllerDelegate

并且实现方法

-(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller

{

    NSLog(@"%@",controller);

    return  UIModalPresentationNone;

}