ArchieR7

[self.KVOController observe:self
                            keyPath:NSStringFromSelector(@selector(observeObjectName))
                            options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew
                              block:^(id  _Nullable observer, id _Nonnull object, NSDictionary<NSString *,id> * _Nonnull change) {
                            //do something
}];

ArchieR7

dismiss(animated: true, completion: nil)

ArchieR7

 func testAsyncFunction() {
        let exp = expectation(description: "Async Expectation")
        NetworkManager.shared.update(data: Data(), completeHandler: {
            exp.fulfill()
        })
        waitForExpectations(timeout: 30, handler: nil)
    }

ArchieR7

import UIKit

struct UISetting {
    static let blue = UIColor(colorLiteralRed: 21/255, green: 122/255, blue: 251/255, alpha: 1)
}

ArchieR7

func setUpView() {
    let loginButton = CircleButton()
    loginButton.backgroundColor = UISetting.blue
}

ArchieR7

pod 'Firebase/AdMob'

ArchieR7

import Firebase
import GoogleMobileAds

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    
    FirebaseApp.configure()
    GADMobileAds.configure(withApplicationID: Your_Ads_ApplicationID)
    
    return true
}

ArchieR7

func loadAdMob() {
    GADRewardBasedVideoAd.sharedInstance().delegate = self
    let request = GADRequest()
    GADRewardBasedVideoAd.sharedInstance().load(request, withAdUnitID: AdUnitID)
}

ArchieR7

if GADRewardBasedVideoAd.sharedInstance().isReady {
    GADRewardBasedVideoAd.sharedInstance().present(fromRootViewController: self)
} else {
    //do something
}

ArchieR7

func rewardBasedVideoAd(_ rewardBasedVideoAd: GADRewardBasedVideoAd, didRewardUserWith reward: GADAdReward) {
    //give user reward
}
    
func rewardBasedVideoAd(_ rewardBasedVideoAd: GADRewardBasedVideoAd, didFailToLoadWithError error: Error) {
    print("Reward based video ad failed to load: \(error.localizedDescription)")
}
    
func rewardBasedVideoAdDidReceive(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
    print("Reward based video ad is received.")