All the codes have been updated to Swift 4.1.

30-swift-projects-in-30-days

For any problem, please send me the e-mail: egeg3000@gmail.com.

Project 30 - Google Now App

What I learned:

How to do Transition Animation for Present/Dismiss
How to do combine animation based on BubbleTransition
Draw round button, the codes are:

triggerButton.layer.cornerRadius = triggerButton.frame.width / 2
triggerButton.layer.masksToBounds = true

Project 29 - Beauty Contest

What I learned

This project is based on Yalantis的Koloda, Koloda is a very useful UIImage Selector.
Two ways to use lazy load in Swift:

lazy var firstWay = "first"

And

lazy var secondWay: String = {return "Second"}()

Warning: For the second way, you must define the TYPE FIRST, so the complier could check in the beginning.

Project 28 - SnapChat Like App

What I learned

Usage of UIScrollView, e.g., how to forbidden bounces property, isPagingEnabled property, and contentOffset property
How to use addChildViewController
How to use AVCaptureSession

Project 27: Carousel Effect (跑马灯效果)

What I learned

Usage of UICollectionView, for example, to deal with padding within cells, you could adjust with minimumLineSpacingForSection
To customize a layout, you need to realize such func:

        prepare()
        shouldInvalidateLayout(forBoundsChange newBounds: CGRect)
        targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) 
        layoutAttributesForElements(in rect: CGRect)

Usage of Visual Effect View

Project 26 - Twitter-like Splash

What I learned

Usage of CAAnimation
reference of Keypath in CAAnimation
add Key Animation Frame by using CAKeyFrameAnimation

Project 25 Custom Transition

What I learned

We can customize animation of navigationcontroller, that is to say, to implement the func in UINavigationControllerDelegate
If we only need to focus on fromVC & toVC, we only need to implement such methods:

navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationControllerOperation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning?

Project 24 - Vertical Menu Transition

What I learned

Customize naviation transition for Present/Dismiss
Generally speaking, for target-action, we will set target to "self". But if we set target to "delegate", then the action should be set #selector(CustomTransitionDelegate.functionName)
In the transition Animation complete block, please insert following func:

    transitionContext.completeTransition(true)
    fromViewController?.endAppearanceTransition()
    toViewController?.endAppearanceTransition()

Project 23 - Side Navigation App

What I learned

Mix Swift with Objective-C
- New a head file, e.g., Bridge.h
- Click Project file, then Build Setting, then Objective-C Bridge Header, set the file path in Bridge.h
- Then import all the header files in Bridge.h
Learned how to use SWRevealViewController

Project 22 - Basic Animations

What I learned

For animation related to position, we can both implement by modify the origin, and by setting the transform property of UIView
For animation related to Opacity, we can modify the alpha directly
For animation related to Scale, set the transform property of UIView, e.g.:

heartView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)

For animation related to Color, modify the backgroundColor property
For animation related to Rotation, set the Scale Object to transform, e.g.:

heartView.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)

Project 21 CoreData App

What I learned

In order to autogenerate some codes for you, please check UseCoreData while creating new project.
Don't have to use Editor to generate Subclass
Reference

Project 20 - Apple Watch OS App - Guess Game

What I learned

Need to select Watch OS while creating the project.
Have to use Storyboard to do the layout for apple watch, and the related file is Interface.storyboard
Use WCSession to do the interaction between Watch and Main App
Usecase refer too:WatchKit Introduction: Building a Simple Guess Game

Project 19 - TodayWidget

What I learned

Create Today Widget: "File > New > Target"，then select the iOS section's "Application Extension's Today Extension"
In order to share data between widget and app, please open the "App group" function. "target -> capability -> App Group -> Open it"
Add the group and name it, then redo this steps in Extension's target, and select the group you created just now.
Can use UserDefault as the shared storage between Main App and Widget, but we can't use StandardUserDefaults here, only to use suitName, and the name must follow the named group, e.g.:

let userDefault = UserDefaults(suiteName: "group.nimoAndHisFriend.watchDemo")

Project 18 - Spotlight Search

What I learned

How to use Spotlight Search:
- import CoreSpotlight
- Add the object as CSSearchableItem: Create a CSSearchableItemAttributeSet, then fill it's properties, such as title, contentDescription, and thumbData
- CSSearchableItemAttribuitSet's thumbData can be catched either by UIImageJPEGRepresentation or by UIImagePNGRepresentation(Depend on the type of photo)
- Create CSSearchableItem Obj, then add to SearchIndex by indexSearchableItems:

let tmpItems = [searchItem]
CSSearchableIndex.default().indexSearchableItems(tmpItems) { (error) in
}

If you face problems in debug, please reset the simulator, or just debug with Device.

Project 17 - 3D Touch Quick Action

Please make sure the application can support 3D Press function: self.window?.traitCollection.forceTouchCapability == .available
There are two kinds of operation with 3D Press: By long press icon in Spring Board(destop in iOS), and by long press some certain element and have a Peek View in Application.
For the first type, create the item with UIApplicationShortcutItem, then set the application's shortcutItems property. Please remember, you can't use custom icon.
For the second type, please add related event in the ViewController you want to:
- implement UIViewControllerPreviewingDelegate
- register 3D Touch support : self.registerForPreviewing(with: self, sourceView: self.view)
- implement following methods:

    func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? 
    func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController)

Project 16 - LoginAnimation

What I learned

Bounce animation need to use ```usingSpringWithDamping````, and please pay attention to:
- usingSpringWithDamping：the less the more exaggerate
- initialSpringVelocity: the initial speed of animation
- options: you can choose the animation method, such as EaseIn, EaseOut, EaseInOut...
ReferenceDoc1,Doc2
This kind of animation is so amazing, I like it :P

Project 15 - Tumblr Menu

What I learned

animation + BlurEffect
These lines of icon's appearing has a sequence, please control it by setting different delay value
For custom button, I refered to :Custom Button

Project 14 - Video Splash

What I learned

Create an AVPlayerViewController, then set it as the background of View
Then autoplay with AVPlayerViewController
Refered to a lib called VideoSplashViewController

Project 13: Animation In TableViewCell

What I learned

Do the animation in method: viewWillAppear. Then get all the cells by visibleCells of tableView, then do enumerate it and do animation
Do animation by using usingSpringWithDamping, set 0.8 to usingSpringWithDamping, 0 to initalSpringVelocity.

Project 12 - Emoji Slot Machine

What I learned

Use UIPicker to do this game
In order to avoid show the edge of the UIPickerView, the first value and the last value of UIPickerView is forbidden. Int(arc4random())%(emojiArray.count - 2) + 1
Add double click action to make sure it will trigger the 'bingo'
I love this game. :)

Project 11 - Gradient in TableView

What I learned

Use CAGradientLayer on UITableViewCell
I suggest to use CAGradientLayer as the backgroundView of cell
hide the useless style of UITableViewCell:

      table.separatorStyle = .none
      cell.selectionStyle = .none

Project 10 - Stretchy Header

What I learned

get the offset of ScrollView by implementing scrollViewDidScroll of UIScrollView
then set Max and Min of the scale for picture
set the transform of UIImageView to finish it:

bannerImgView.transform = CGAffineTransform(scaleX: scaleFactor, y: scaleFactor)

Project 9 - Swipeable Cell

What I learned

use editActionsForRowAt for UItableView, and set the functions as a array to the return value:Array<UITableViewRowAction>
for each action please init UITableViewRowAction, and set the logic in block.
this demo only for general usage of swipeable cell, if you want to custom the swiped button, you must customize the Cell and implement functions by UIPanGesture

Project 8 - Color Gradient

What I learned

Use CAGradientLayer for the Gradient effect
Color set's concept will help to make the array of color. Please pay attention hat the property is CGColor
Changing color by scrolling is implemented by PanGestureRecognizer, and the effect and operation refered to : Solar

Project 7 - Simple Photo Browser

What I learned

Set imageView on ScrollView to do Image Zoom
Set maxZoomScale / minZoomScale
implement viewForZooming method

Project 6 - Video Player

What I learned

How to use AVPlayer, AVPlayerViewController and AVPlayerLayer
How to run app in background by do configuration in plist
Show info in Lock Screen(remoteControlReceived)
Grammer: do...catch...
Reference

Project 5 - Pull To Refresh

What I learned

Usage of UIRefreshControll: message: attributedTitle, action: UIControlEvents.valueChanged

Project 4 - Limited Input Text Field

What I learned

limit input by capturing texting method: textViewDidChange
By observing NSNotification.Name.UIKeyboardWillChangeFrame, we can get the pop and dismiss of system keyboard.

Project 3 - Find My Position

What I learned

configuration of location: in plist, please add: NSLocationAlwaysUsageDescription
can use CLLocationManger to do locate
if you face Domain=GEOErrorDomain Code=-8 "(null)", please change CLGeocoder var to global var

Project 2: Watch Demo

What I learned

Update cocoaPods to 1.2.0
Learn how to use SnapKit (Quite similar with Monsary)
Learn how to use Timer in Swift
What I learned： guard，refer to guard

Project 1: Change Custom Font

What I learned

How to change property of font
we could search font name in Storyboard, or following codes:

       func printAllSupportedFontNames() {
        let familyNames = UIFont.familyNames
        for familyName in familyNames {
            print("++++++ \(familyName)")
            let fontNames = UIFont.fontNames(forFamilyName: familyName)
            for fontName in fontNames {
                print("----- \(fontName)")
            }}}

nimomeng/30-swift-projects-in-30-days

30-swift-projects-in-30-days