Study Swift: news

Showing posts with label news. Show all posts

Tuesday, June 14, 2016

Apple News - WWDC 2016

Here are some new products announced by Apple in WWDC 2016:

1. iOS 10

iOS 10 Preview

Devices supported:

iPhone 5 and later iPhones
iPad 4 and later iPads
iPod Touch 6

List of iOS 10 Compatible iPhone, iPad, and iPod Touch Models

2. OS X -> macOS

macOS Sierra Preview

3. watchOS 3

watchOS 3 Preview

4. Swift Playgrounds

Swift Playgrounds app for iPad

5. App Development with Swift

iBook - App Development with Swift

More Information:

Everything Apple announced at WWDC 2016 in one handy list
蘋果WWDC 2016新品總整理
蘋果 2016 WWDC：Siri、Apple Maps、iMessage、通知通通開放 API！
內部融合大團結！iOS 10 這次不推創新，只求所有第三方 App 與 iOS 能綁得更緊密～
蘋果取巧地讓開發者為 iOS 10 原生 App 設計新功能

Friday, April 8, 2016

Programmers might be able to use Swift for Android development in the future?

The Next Web:
Google is said to be considering Swift as a ‘first class’ language for Android

Inside.com.tw:
Swift 將成 Android 主要語言？Google 、Uber、Facebook 齊聚討論

Monday, March 28, 2016

UIButton - Selector Warning (Update with Swift 3.1)

Update:
May 1, 2017:
Swift 3.1 with Xcode 8.3.2.

May 29, 2016:
The class name in the selector may be removed. Use #selector(buttonPressed) instead of #selector(ViewController.buttonPressed) for code simplicity.

On March 21, 2016, Apple released Xcode 7.3 with Swift 2.2. This new version of Swift is the first official release after the programming language became open source on December 3, 2015. The official Swift.org blog says that 212 non-Apple programmers have contributed to this release. Below is the first issue I face with Swift 2.2.

After I updated Xcode to Version 7.3, a warning appears with the UIButton code I normally use:

let button = UIButton()

button.addTarget(self, action: "buttonPressed", forControlEvents: UIControlEvents.TouchUpInside)

A warning is shown in front of the line number:

If I ignore the warning and continue to build the code, the UIButton still works perfectly.

By clicking the warning triangle, the warning description says that Use of string literal for Objective-C selectors is deprecated; use '#selector' instead.

Select the Fix-it Replace option.

Then the warning is disappeared as below:

button.addTarget(self, action: #selector(ViewController.buttonPressed), forControlEvents: UIControlEvents.TouchUpInside)

Update May 1, 2017 (Swift 3.1):

import UIKit

class ViewController: UIViewController {

override func viewDidLoad() {

super.viewDidLoad()

let button = UIButton(frame: CGRect(x: 0, y: 0, width: 200, height: 40))

button.center = view.center

button.setTitle("Press", for: UIControlState.normal)

button.setTitleColor(UIColor.blue, for: UIControlState.normal)

button.setTitleColor(UIColor.cyan, for: UIControlState.highlighted)

button.addTarget(self, action: #selector(buttonPressed), for: UIControlEvents.touchUpInside)

view.addSubview(button)

}

func buttonPressed() {

print("button pressed!!")

}

Update May 29, 2016 (Swift 2.2):

Remove the class name in the selector: #selector(~~ViewController.~~buttonPressed)and the complete UIButton code now becomes:

override func viewDidLoad() {

super.viewDidLoad()

let button = UIButton(frame: CGRectMake(0, 0, 200, 200))

button.center = view.center

button.setTitle("Press", forState: UIControlState.Normal)

button.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

button.setTitleColor(UIColor.cyanColor(), forState: UIControlState.Highlighted)

button.addTarget(self, action: #selector(buttonPressed), forControlEvents: UIControlEvents.TouchUpInside)

view.addSubview(button)

}

func buttonPressed() {

print("button pressed!!")

}

Here is more explanation about the modification of Objective-C selectors in Swift 2.2:

Referencing the Objective-C selector of a method

More Information about modifications in Swift 2.2:

Swift 2.2 Released!(Official Swift.org blog)

Reference:

UIButton - Update button label when pressed

Friday, December 11, 2015

How to Learn Swift without a Mac - IBM Swift Sandbox

Is it possible to learn the Swift programming language without a Mac or Xcode?

Now there is a simple way to learn Swift free online.

IBM Swift Sandbox has made it possible!!

Why not go to the IBM Swift Sandbox page now?

Simply write your Swift code in the left side of the page and click the Run button.
Immediately you will see the output at the right side.

This web service is with the latest 2.2 version.

References:
Official Swift Online Document
Relative posts (Swift Syntax) on this blog
Apple Releases Swift as Open Source