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工具栏中间的Admob横幅

[英]Admob banner in the middle of toolbar

Is it possible to put admit banner in the middle of navigationController.toolbar ? 是否可以将横幅广告放置在navigationController.toolbar的中间? Way I did it (inside viewDidLoad ): 我做到的方式(在viewDidLoad内部):

    let banner = GADBannerView(adSize: kGADAdSizeBanner)
    banner.adUnitID="ca-app-pub-123"
    banner.rootViewController=self
    banner.load(GADRequest())
    self.navigationController?.isToolbarHidden=false
    self.navigationController?.toolbar.addSubview(banner)
    self.navigationController?.toolbar.sizeToFit()

However banner is aligned to the left side of a toolbar. 但是,横幅与工具栏的左侧对齐。 Is there a simple way to align banner to the middle? 有没有一种简单的方法可以将横幅对准中间?

请为您的横幅添加位置

banner.frame.origin = CGPoint(x: self.navigationController?.toolbar.frame.width / 2 - banner.frame.width / 2, y: self.navigationController?.toolbar.frame.height / 2 - banner.frame.height / 2)

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