Swift实现一句代码不用写加载首次启动引导图
#
kImageNamsArray:引导页的图片数组 kHiddenBtnImageName: 关闭引导页的按钮图片 kHiddenBtnCenter: 关闭引导页按钮的位置
实现原理
1.给Appdelegate增加扩展, 添加guaidWindow属性
private struct AssociatedKeys {
static var guideWindowKey = "guideWindowKey"
}
private var guaidWindow: UIWindow? {
get {
return objc_getAssociatedObject(self, &AssociatedKeys.guideWindowKey) as? UIWindow
}
set {
if newValue != nil {
objc_setAssociatedObject(self, &AssociatedKeys.guideWindowKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
}
2.通过运行时进行方法的交换
public override class func initialize(){
DispatchQueue.once(token: "交换appDelegate方法") {
let lastVersion = UserDefaults.standard.float(forKey: "lastVersionKey")
let currentVersion = Float((Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String) ?? "0")!
if currentVersion > lastVersion {
let originalMethod = class_getInstanceMethod(self, #selector(application(_:didFinishLaunchingWithOptions:)))
let customMethod = class_getInstanceMethod(self, #selector(guide_application(_:didFinishLaunchingWithOptions:)))
method_exchangeImplementations(originalMethod, customMethod)
}
}
}
func guide_application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
guaidWindow = UIWindow()
guaidWindow!.frame = UIScreen.main.bounds
guaidWindow!.backgroundColor = UIColor.white
guaidWindow!.windowLevel = UIWindowLevelStatusBar + 1
self.guaidWindow!.makeKeyAndVisible()
let vc = ZSGuaidViewController()
vc.hide = {[weak self] in
print("1111")
let currentVersion = Float((Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String) ?? "0")!
UserDefaults.standard.set(currentVersion, forKey: "lastVersionKey")
UserDefaults.standard.synchronize()
self?.guaidWindow?.resignKey()
self?.guaidWindow?.isHidden = true
self?.guaidWindow = nil
}
guaidWindow?.rootViewController = vc
return guide_application(application, didFinishLaunchingWithOptions: launchOptions)
}
}
Demo地址觉得有用给个��, Demo也实现了一句话加载广告页.
