Ipad弹出UIAlertControllerStyleActionSheet时发生崩溃

pad弹出UIAlertControllerStyleActionSheet时，在iphone上运行正常，但在ipad上崩溃，解决代码如下：

UIAlertController *alertVc = [UIAlertController alertControllerWithTitle:@"请选择图片" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];

 

    if (isiPad) {//判断是否为ipad

        UIPopoverPresentationController *popover = alertVc.popoverPresentationController;

        if (popover) {

            popover.sourceView = view;//视图中的某个view

            popover.sourceRect = view.bounds;

            popover.permittedArrowDirections = UIPopoverArrowDirectionDown;//alertVC弹出的位置

        }

    }

    

    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        

    }];

    

    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

    

    }];

    UIAlertAction *action3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {

        [alertVc dismissViewControllerAnimated:YES completion:nil];

    }];

    

    [alertVc addAction:action1];

    [alertVc addAction:action2];

    [alertVc addAction:action3];

    

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

 

转载于:https://www.cnblogs.com/lmg4819/p/7595783.html