如何使用Swift在QLPreviewController中隐藏共享按钮? [英] How to hide share button in QLPreviewController using swift?

问题描述

我正在使用以下代码使用QLPreviewcontroller在我的应用程序中显示一些文档，

I'm using the below code to use QLPreviewcontroller to show some documents in my app,

let ql = QLPreviewController()
ql.dataSource = self
//ql.navigationItem.rightBarButtonItems = nil
ql.navigationItem.rightBarButtonItem = nil
presentViewController(ql, animated: true, completion: nil)

我不希望QLPreviewcontroller右上方的共享按钮.我尝试将rightBarButtonItem设置为nil，但是它不起作用.

I don't want the share button in the right top of QLPreviewcontroller. I'd tried setting rightBarButtonItem to nil, but it's not working.

我怎么藏起来?

推荐答案

在 iOS 10的Swift 3 中，这些解决方案都不对我有用.问题是共享按钮是在viewDidAppear方法之后创建的.

None of those solutions worked for me in Swift 3 for iOS 10. The issue is that the Share button is created after viewDidAppear method.

以下是我删除共享按钮的步骤:

Here are the steps I followed to remove the share button :

1)继承了我的QLPreviewController

1) Subclassed my QLPreviewController

2)创建了一个方法来打开此子类中的文档:

2) Created a method to open my document in this subclass :

func show(controller: UIViewController, url: NSURL) {
    // Refreshing the view
    self.reloadData()
    // Printing the doc
    if let navController = controller.navigationController {
        navController.pushViewController(self, animated: true)
    }
    else {
        controller.show(self, sender: nil)
    }
}

3)在我的viewDidLayoutSubviews中，我创建了一个虚拟按钮项来替换共享按钮:

3) In my viewDidLayoutSubviews, I created a dummy button item to replace the share button :

 override func viewDidLayoutSubviews() {
    navigationItem.rightBarButtonItems?[0] = UIBarButtonItem()
}

4)当我想在另一个VC中打开文档时，我这样称呼它:

4) When I want to open a document in another VC, I call it like this :

 QLSubclass().show(controller: self, url: path as NSURL)

注意:请始终以这种方式进行调用，而不要使用您实例化的全局变量，因为共享按钮消失之前，您总会看到它.

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