30-iOS-swift-projects-in-100-days

30 iOS projects with Swift in my next 100 days(next server months or years maybe)

22.Simple Game With SpriteKit

Date: 2018-5-26

What I learned from this demo:

• Try to build iOS game with SKView, GameScene in SpriteKit
• Use the simple physic system such as collision test in game
• Overload basic operators of CGPoint in Swift

21.Keychain for Security

Date: 2018-5-6

What I learned from this demo:

• Use Keychian source code for security in swift
• New keywords in swift: throws, where clause in extension, enum in class, UserDefaults and UIDevice

Resource: GenericKeychain

20.CocoaPods in iOS

Date: 2018-4-27

What I learned from this demo:

• Try CocoaPods in AppCode, edit pod file and install the specified pod: MBProgressHUD
• Use sleep method of Thread with DispatchQueue to simulate long-time-process

PS: While I use CocoaPods in AppCode, even though the pod is installed but I cannot use it, everything ends with this error: No such module 'MBProgressHUD'. At last I fix this problem after searching on website:

1. Open project (the .xcworkspace file) in XCode
2. Open menu: Product - Scheme - Manage Schemes, only check the Pods item and click Close button
3. Click menu: Product - Build
4. Return to AppCode, and this time even thought the error is still there but the code assistant works fine, leave it, just build and run, it works!

That's all, why it happens? I got no idea.

19.Tabs with Controllers

Date: 2018-2-15

What I learned from this demo:

• Work with UITabBarController, and the controllers embed with UINavigationController
• Implement the UITextFieldDelegate protocol to monitor the changes of text content
• The basic map view in controller setup, set location in simulator, make annotation in view

18.Line Drawing View

Date: 2018-2-14

What I learned from this demo:

• Touch event handle in UIResponder with multiple pointers, and super view
• Basic graphic in UIView, draw lines with path, stroke, width and color
• Use @IBInspectable to make properties visible in Storyboard settings panel
• Clip the view and save to image file, show the hidden toolbar in navigation

17.Walkthrough Pages

Date: 2018-2-7

What I learned from this demo:

• Work with protocals: UIPageViewControllerDelegate and UIPageViewControllerDataSource to build UIPageViewController
• Use NSLayoutConstraint to do the animation of controls
• Instantiate view controllers by UIStoryboard

PS. This project supports one solution to the animation problems in the previous project: 10.Basic Animation by using the NSLayoutConstraint in layout.

16.Flickr Recent Photos

Date: 2018-1-26

What I learned from this demo:

• Deal with the errors in Swift with enum types and Error protocol
• Solve the problem of wrong image place in UIImageView while reuse the cells in table view
• Save image file to file system with UIImageJPEGRepresentation and FileManager
• Use UIActivityIndicatorView to preload images

15.Json Data Presenter

Date: 2018-1-24

What I learned from this demo:

• Load json data from server and parse it to local data class
• Work with URLRequest, URLQueryItem and URLComponents to fetch network data
• Initialize data in AppDelegate through view controller

PS: For the reason of reusable of cells, the image will not be correctly presented in the expected UIImageView, but I have solved this in my next app.

14.Save Data To File

Date: 2018-1-20

What I learned from this demo:

• Create object with NSObject and NSCoding protocol
• Save encoded object to local file with FileManager and NSKeyedArchiver
• Understand the basic knowledge of the app's life circle
• Work with Date, DateFormatter, tableView.deleteRows, and editButtonItem

13.Pure Code App

Date: 2018-1-18

What I learned from this demo:

• Delete and get rid of the storyboard, just add code in AppDelegate to install views
• Pure code for custom table view cell class, override the init function to do initialization
• Add the simple UILabel to the content view of the table view cell
• Code for the simplest constrains(I notice that, you should constrain the label to the self.view but not to the content view!)

12.Simple Image Viewer

Date: 2018-1-15

What I learned from this demo:

• Use the UIScrollView with ImageView to scale image
• Simple usage of the NumberFormatter, and the lazy property definition
• Add Tap Gesture Recogizer to the main view in Interface Builder to deal with keyboard dismiss

11.Simple Network Image View

Date: 2017-12-30

What I learned from this demo:

• Load and display image from server by using URLSession
• Deal with the response, data and error of the network connection result
• Switch from net thread to the main thread to control the UI elements through DispatchQueue

I cannot load image from the non-https URL, so add the property Allow Arbitrary Loads under App Transport Security Settings, set the value as YES.

10.Basic Animation

Date: 2017-12-22

What I learned from this demo:

• The basic animation with the controls in iOS
• Show or hide the navigation bar or bar items in code
• Use computed data or properties in swift
• Understand the method viewWillAppear and viewDidAppear for controlling the animation logic

I found a problem that the position of controls in viewWillAppear cannot move, even thought the value is changed! However if you put the code in viewDidAppear then the controls will move, but, the animation looks wried!!! So, I have to hide(set alpha=0.0) and then move them in viewDidAppear, why this happens(the auto layout is not the reason!)?

override func viewWillAppear(_ animated: Bool)
{
    super.viewWillAppear(animated)

    print(self.labelHeading.center.x) //result is 147.5, all right.
    self.labelHeading.center.x -= self.view.bounds.width //no movement happens!
    print(self.labelHeading.center.x) //is -227.5, OK, but no changes on the screen, why???
}
override func viewDidAppear(_ animated: Bool)
{
    super.viewDidAppear(animated)

    self.labelHeading.center.y -= self.view.bounds.height //the control moves here!
}

09.Editable Table View

Date: 2017-12-19

What I learned from this demo:

• Change the edit mode in UITableView, use the method setEditing(_, animated:)
• Rearrange the table view cell items in edit mode
• Dynamicly change the title of the bar button item
• Add text filed to the alert, and deal with the text result

08.Basic Collection View

Date: 2017-10-21

What I learned from this demo:

• Work with collection view, within more than one columns
• Delete items in collection view through UILongPressGestureRecognizer and UIAlertController and IndexPath in collection view
• Extension with UICollectionViewDelegateFlowLayout, override the important optional methods
• Try to use circular images in code:

cell.imageTitle.layer.cornerRadius = cell.imageTitle.bounds.height * 0.5
cell.imageTitle.clipsToBounds = true

07.Pull To Refresh Table View

Date: 2017-10-14

What I learned from this demo:

• Add refresh control to achieve pull-to-refresh and reload data in table view
• Override numberOfSections(in : UITableView) function to change the default appearance of empty table view
• Set title and add navigation bar items in swift code

06.Photo Picker

Date: 2017-10-05

What I learned from this demo:

• Work with static cells in static table view
• Use container view (UIContainerView) to embed other view
• Specify user permissions in the Info.plist file
• Deal with the focus of UITextField, with becomeFirstResponder() and the implementation of UITextFieldDelegate protocol, return true in textFieldShouldReturn(_ textField: UITextField) -> Bool method
• Try to use camera and photo library with image picker

05.Detail Table View

Date: 2017-09-03

What I learned from this demo:

• Pass data from one view to another through segue
• Work with custom view controller and embed them in the navigation controller
• Customize the swipe action menus of table view cells
• Multiple lines for UILabel (set lins to 0 in storyboard), customize the navigation bar item (the code should be placed in main ViewController, not the detail view controller), and remove the blanks between top bar and table view (uncheck the Adjust Scroll View Insets in view controller)

04.Basic Table View

Date: 2017-09-02

What I learned from this demo:

• Basic table view and the simple custom cell
• Display local data, add or edit local data and refresh the table
• Use UIAlertController with text field and deal with the response of alert actions
• Change the constrains of the table view in the view container by storyboard

03.Tip Calculator

Date: 2017-08-26

What I learned from this demo:

• Swift extensions, double to string format, computed values
• Multiple stack view to build more flexible layout
• Use the slider, and give it the value change response handler
• Add custom UIToolBar to the number keyboard, set clear button and keyboard type
• Deal with the focus of UITextField, and enable or disable the other elements

02.Tap Hold Counter

Date: 2017-08-20

What I learned from this demo:

• Swift property delegations: willSet/didSet
• Detect Tap and Long Press Gestures on buttons
• Multiple actions on one button: addGestureRecognizer

01.Tap Counter

Date: 2017-08-17

What I learned from this demo:

• Build a basic interface with Button/Label/NavigationBar/BarButtomItem
• AutoLayout basics: Stack View and Constrains
• The keywords: @IBOutlet/@IBAction/weak
• I now upload the projects to Github via git on my Macbook

What inspires me is the project: 100 Days of Swift