yabenatti

extension HomeViewController : UITableViewDataSource {
    //Métodos obrigatórios
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.animalsArray.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: homeCellIndentifier, for: indexPath) as? HomeTableViewCell else {
            fatalError("Cannot create Home Table View Cell")
        }

yabenatti

//Regular function
func fillScreen() {
    if let animal = self.selectedAnimal {
        self.animalImageView.image = UIImage.init(named: animal.image)
        self.animalNameLabel.text = animal.name.uppercased()
    }
}

//Function with alias on parameter
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

yabenatti

enum Errors : Int {
    case Unexpected = -1
    case NoInternet = 1
    case InvalidToken = 2
}

yabenatti

struct Colors {
    
    private init () {}
    
    static let lightSalmonPink : UIColor! = UIColor(red: 248/255, green: 153/255, blue: 157/255, alpha: 1)
    static let lightPurpleUbe : UIColor! = UIColor(red: 125/255, green: 122/255, blue: 188/255, alpha: 1)
    static let darkGray : UIColor! = UIColor(red: 132/255, green: 146/255, blue: 166/255, alpha: 1)
}

yabenatti

class Animal {
    let name: String
    let image: String
    
    
    init (name: String, image: String) {
        self.name = name
        self.image = image
    }
}

yabenatti

var optionalString: String? = nil

if let unwrappedOptionalWithIf = optionalString {
    print("Use \(unwrappedOptionalWithIf) here")
}

func printString(string: String?) {
    guard let unwrappedOptionalWithGuard = optionalString else {
        print("Treat error")
        return

yabenatti

let nonMutableProperty = "this content cannot change"
var mutableProperty = "this content can be changed"
mutableProperty = "changing variable content"

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DELEGATE METHODS CALLED WHEN OPENING APP  

Opening app when system killed or user killed  
    didFinishLaunchingWithOptions  
    applicationDidBecomeActive    

Opening app when backgrounded  
    applicationWillEnterForeground  
    applicationDidBecomeActive  

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#pragma mark - User Defaults

//Saves information on cache
+ (void)saveToUserDefault:(NSObject*)objectToSave withKey:(NSString*)key {
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:objectToSave forKey:key];
    [userDefaults synchronize];
}

//Retrieves information from cache

yabenatti

import Foundation
import Alamofire

class AccessTokenAdapter: RequestAdapter {
    private let accessToken: String
    
    init(accessToken: String) {
        self.accessToken = accessToken
    }