How to change the status bar background color and

2019-01-01 10:36发布

My current application runs on iOS 5 and 6.

The navigation bar is having an orange color and the status bar is having a black background color with white text color. However, when I run the same application on iOS 7, I observe the status bar looks transparent with the same orange background color as the navigation bar and the status bar text color is black.

Due to this I'm not able to differentiate between the status bar and the navigation bar.

How do I make the status bar to look the same as it was in iOS 5 and 6, that is with black background color and white text color? How can I do this programmatically?

19条回答
冷夜・残月
2楼-- · 2019-01-01 11:10

If you're using a UINavigationController, you can use an extension like this:

extension UINavigationController {
    private struct AssociatedKeys {
        static var navigationBarBackgroundViewName = "NavigationBarBackground"
    }

    var navigationBarBackgroundView: UIView? {
        get {
            return objc_getAssociatedObject(self,
                                        &AssociatedKeys.navigationBarBackgroundViewName) as? UIView
        }
        set(newValue) {
             objc_setAssociatedObject(self,
                                 &AssociatedKeys.navigationBarBackgroundViewName,
                                 newValue,
                                 .OBJC_ASSOCIATION_RETAIN)
        }
    }

    func setNavigationBar(hidden isHidden: Bool, animated: Bool = false) {
       if animated {
           UIView.animate(withDuration: 0.3) {
               self.navigationBarBackgroundView?.isHidden = isHidden
           }
       } else {
           navigationBarBackgroundView?.isHidden = isHidden
       }
    }

    func setNavigationBarBackground(color: UIColor, includingStatusBar: Bool = true, animated: Bool = false) {
        navigationBarBackgroundView?.backgroundColor = UIColor.clear
        navigationBar.backgroundColor = UIColor.clear
        navigationBar.barTintColor = UIColor.clear

        let setupOperation = {
            if includingStatusBar {
                self.navigationBarBackgroundView?.isHidden = false
                if self.navigationBarBackgroundView == nil {
                    self.setupBackgroundView()
                }
                self.navigationBarBackgroundView?.backgroundColor = color
            } else {
                self.navigationBarBackgroundView?.isHidden = true
                self.navigationBar.backgroundColor = color
            }
        }

        if animated {
            UIView.animate(withDuration: 0.3) {
                setupOperation()
            }
        } else {
            setupOperation()
        }
    }

    private func setupBackgroundView() {
        var frame = navigationBar.frame
        frame.origin.y = 0
        frame.size.height = 64

        navigationBarBackgroundView = UIView(frame: frame)
        navigationBarBackgroundView?.translatesAutoresizingMaskIntoConstraints = true
        navigationBarBackgroundView?.autoresizingMask = [.flexibleWidth, .flexibleBottomMargin]

        navigationBarBackgroundView?.isUserInteractionEnabled = false

        view.insertSubview(navigationBarBackgroundView!, aboveSubview: navigationBar)
    }
}

It basically makes the navigation bar background transparent and uses another UIView as the background. You can call the setNavigationBarBackground method of your navigation controller to set the navigation bar background color together with the status bar.

Keep in mind that you have to then use the setNavigationBar(hidden: Bool, animated: Bool) method in the extension when you want to hide the navigation bar otherwise the view that was used as the background will still be visible.

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