ios - 如何使图像仅在 iPhone 6/6s 上可见

Question

所以我想用 swift 或 Storyboard在 xcode 中制作一张只在 iPhone 6 和 6S 上可见的图像。你们有什么建议吗？ :)

Answer 1

第一步是确定设备是 6 还是 6S。这是执行此操作的 Swift 代码:

import Foundation
import UIKit

extension UIApplication
{
    public func isIPhone6or6S() -> Bool
    {
        let IPHONE_6 = "iPhone7,2"
        let IPHONE_6S = "iPhone8,1"

        var systemInfo = utsname()
        uname(&systemInfo)
        let machineMirror = Mirror(reflecting: systemInfo.machine)
        let identifier = machineMirror.children.reduce("") { identifier, element in
            guard let value = element.value as? Int8 where value != 0 else { return identifier }
            return identifier + String(UnicodeScalar(UInt8(value)))
        }

        return ( identifier == IPHONE_6 || identifier == IPHONE_6S) ? true : false;
    }
}

然后你就可以在你的 UIViewController 中轻松地使用它了，就像这样:

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var phoneOnlyImage: UIImageView!
    @IBOutlet weak var hiddenStatusLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // hide it if it is not an iPhone 6 or 6S
        self.phoneOnlyImage.hidden = !(UIApplication.sharedApplication().isIPhone6or6S())

        // show the label so you know if it's working
        self.hiddenStatusLabel.text = (self.phoneOnlyImage.hidden) ? "Image is Hidden" : "Image is visible"
    }
}