Xcode is IDE for development of the iOS, macOS, tvOS and watchOS applications. Every year apple comes up with so many changes in this IDE. Xcode 9.3 released on March 29, 2018.
Here, I am listing out all the issues with the workaround.
Xcode 9
Use of Codable and Coding Key with JSONEncoder and JSONDecoder in Swift 4
Codable is added with Xcode 9, iOS 11 and Swift 4. Codable is used to make your data types encodable and decodable for compatibility with external representations such as JSON.
Codable use to support both encoding and decoding, declare conformance to Codable, which combines the Encodable and Decodable protocols. This process is known as making your types codable.
Let’s Take an Example with Structure of Movie, here we have defined the structure as Codable. So, We can encode and decode it easily.
Create your own Slider menu (Drawer) in Swift
This article is updated with Swift 4 – Xcode 9 – iOS 11
Why to use a library everytime?
Let’s create our own Slide Menu (Drawer) in Swift 4.
1. Create New Project in Xcode 9 with Swift Language
2. Design the Menu in UIViewController
Declaration of Variables and Protocols (Delegate) :
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protocol SlideMenuDelegate { func slideMenuItemSelectedAtIndex(_ index : Int32) } class MenuViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { /** * Array to display menu options */ @IBOutlet var tblMenuOptions : UITableView! /** * Transparent button to hide menu */ @IBOutlet var btnCloseMenuOverlay : UIButton! /** * Array containing menu options */ var arrayMenuOptions = [Dictionary<String,String>]() /** * Menu button which was tapped to display the menu */ var btnMenu : UIButton! /** * Delegate of the MenuVC */ var delegate : SlideMenuDelegate? } |
Following method is for updating the Items in the Menu :
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func updateArrayMenuOptions(){ arrayMenuOptions.append(["title":"Home", "icon":"HomeIcon"]) arrayMenuOptions.append(["title":"Play", "icon":"PlayIcon"]) tblMenuOptions.reloadData() } |
Following method is for click event and animation :
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@IBAction func onCloseMenuClick(_ button:UIButton!){ btnMenu.tag = 0 if (self.delegate != nil) { var index = Int32(button.tag) if(button == self.btnCloseMenuOverlay){ index = -1 } delegate?.slideMenuItemSelectedAtIndex(index) } UIView.animate(withDuration: 0.3, animations: { () -> Void in self.view.frame = CGRect(x: -UIScreen.main.bounds.size.width, y: 0, width: UIScreen.main.bounds.size.width,height: UIScreen.main.bounds.size.height) self.view.layoutIfNeeded() self.view.backgroundColor = UIColor.clear }, completion: { (finished) -> Void in self.view.removeFromSuperview() self.removeFromParentViewController() }) } |
3. Now we will create a Base UIViewController to use anywhere in the project which control the delegate of menu.
First we will create this 3 lines Drawer Icon via Code
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func addSlideMenuButton(){ let btnShowMenu = UIButton(type: UIButtonType.system) btnShowMenu.setImage(self.defaultMenuImage(), for: UIControlState()) btnShowMenu.frame = CGRect(x: 0, y: 0, width: 30, height: 30) btnShowMenu.addTarget(self, action: #selector(BaseViewController.onSlideMenuButtonPressed(_:)), for: UIControlEvents.touchUpInside) let customBarItem = UIBarButtonItem(customView: btnShowMenu) self.navigationItem.leftBarButtonItem = customBarItem; } func defaultMenuImage() -> UIImage { var defaultMenuImage = UIImage() UIGraphicsBeginImageContextWithOptions(CGSize(width: 30, height: 22), false, 0.0) UIColor.black.setFill() UIBezierPath(rect: CGRect(x: 0, y: 3, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 10, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 17, width: 30, height: 1)).fill() UIColor.white.setFill() UIBezierPath(rect: CGRect(x: 0, y: 4, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 11, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 18, width: 30, height: 1)).fill() defaultMenuImage = UIGraphicsGetImageFromCurrentImageContext()! UIGraphicsEndImageContext() return defaultMenuImage } |
Delegate (Protocol) method call :
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func slideMenuItemSelectedAtIndex(_ index: Int32) { let topViewController : UIViewController = self.navigationController!.topViewController! print("View Controller is : \(topViewController) \n", terminator: "") switch(index){ case 0: print("Home\n", terminator: "") self.openViewControllerBasedOnIdentifier("Home") break case 1: print("Play\n", terminator: "") self.openViewControllerBasedOnIdentifier("PlayVC") break default: print("default\n", terminator: "") } } |
To open a view controller by identifier :
Set the Restoration Identifier and Storyboard Identifier. If current view is open then we will not open it once again for that we have to check via Restoration Identifier.
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func openViewControllerBasedOnIdentifier(_ strIdentifier:String){ let destViewController : UIViewController = self.storyboard!.instantiateViewController(withIdentifier: strIdentifier) let topViewController : UIViewController = self.navigationController!.topViewController! if (topViewController.restorationIdentifier! == destViewController.restorationIdentifier!){ print("Same VC") } else { self.navigationController!.pushViewController(destViewController, animated: true) } } |
4. Now We will assign this drawer to any of the UIViewController
We have to use only one method to add drawer (slide menu) self.addSlideMenuButton()
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import UIKit class HomeVC: BaseViewController { override func viewDidLoad() { super.viewDidLoad() addSlideMenuButton() } } |
Source Code is available at the Github AKSwiftSlideMenu
You can download for versions of Swift 2, Swift 3 or Swift 4. From Releases Tab at GitHub AKSwiftSlideMenu.
I have uploaded a video for easy way to integrate AKSwiftSlideMenu in your project :
Check other blog posts about Swift
Happy Coding 🙂