在QLPreviewController中隐藏共享按钮

Question

我需要向QLPreviewController隐藏共享按钮按钮

这是在新视图中显示PDF (例如)的原始代码

var previewItem = NSURL()
func preview(_command: CDVInvokedUrlCommand){
 self.previewItem = fileLocationURL! as NSURL
 let previewController = QLPreviewController();
 previewController.dataSource = self;
 self.viewController?.present(previewController, animated: true, completion: nil);
}

extension PreviewAnyFile: QLPreviewControllerDataSource {
    func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
        return 1
    }

    func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
        return self.previewItem as QLPreviewItem
    }
}

​

​

我尝试了这段代码(将QLPreviewController超类为QLSPreviewController )，但share按钮仍然存在

class QLSPreviewController : QLPreviewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
    }
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(true )
        //This hides the share item
        if let add =  self.children.first as? UINavigationController {
            if let layoutContainerView  = add.view.subviews[1] as? UINavigationBar {
                 layoutContainerView.subviews[2].subviews[1].isHidden = true
            }
        }
    }
}

Answer 1

基于几个合理安全的假设：

从UIViewController

• the navigationBar派生的
• 浏览器类来自导航控制器，而不是手动创建的

您应该能够删除UBarButtonItem

在ViewDidLoad内部：

navigationItem.rightBarButtonItems = []

如果需要，也可以从类的外部访问：

myPDFViewController.navigationItem.rightBarButtonItems = []