New Course – Levelling Up in Auto Layout

Hi everyone,

I am very excited to announce a new course on Udemy called Levelling Up In Auto Layout. This course is designed to help iOS developers learn the fundamentals of Auto Layout and help them build and design great layouts.

You can check out the course here. First x50 signups are free using this couple code (please leave a review).

Free Coupon Code

I hope you enjoy the course. See you in there!

LEVEL UP IN AUTO LAYOUT

This course teaches you all the fundamentals and concepts required to build iOS applications using Auto Layout.

TOPICS COVERED

• Constraints
• Pinning & Aligning
• Intrinsic Content Size
• Content Hugging & Compression Resistance
• Layout Guides
• Safe Areas
• Priorities
• Stack Views
• Scroll Views

WHAT YOU GET

Hand crafted videos and walkthroughs on fundamentals of Auto Layout.
Countless examples, challenges, and solution to most common problems.
Solid foundation for becoming a professional iOS Engineer.

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How to zoom scroll Mac

My buddy Dan showed me this cool trick for two finger zooming on the mac.

Open Accessibility in Preferences and select Zoom, then Use scroll gesture with modifier.

Now when you see something you want to zoom into on the screen, hold down control, x2 finger swipe up, and move the mouse around and you will zoom!

Cool. Thx Dan.

Trouble Installing Link Conditioner

With the latest Mojave upgrade, Link Conditioner wasn’t installing correctly. You would follow instructions that would normally work like this

https://nshipster.com/network-link-conditioner/

Only do have it disappear in the System Preferences after using it once.

My buddy Dan showed me the fix. First remove the link conditioner from your personally library preference pane like this

cd 
cd Library/PreferencePanes
rm -rf Network\ Link\ Conditioner.prefPane

Then manually install it in the machine preference by doing this

open /Library/PreferencePanes

And then manually dragging the icon from the Xcode package you downloaded

Into the preference pain you just opened

Once done, the conditioner should show up/and stay in your System Preferences.

Thanks Dan!

How to serve up files locally from your Mac via a webserver

Colleague Dan showed me this neat trick for serving up local files in your Android device as a way of getting access to self-signed certs.

# Simple web server for the local directory
alias webserver='python -m SimpleHTTPServer 8000'

How to add UI Automation test to existing Xcode project

Create a new project.

Add a new target by hitting the ‘+’ sign near the bottom.

Add iOS UI Testing Bundle

Edit your scheme

Confirm at testing bundle was added

Open up your test

And insert a break point

Run your test. Hit record and Xcode will record your application press.

Add accessibility to your buttons and controls like this

    let button: UIButton = {
        let button = UIButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.backgroundColor = .green
        button.setTitle("GOT IT", for: .normal)
        button.setTitleColor(.black, for: .normal)
        button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside)

        button.accessibilityIdentifier = "gotItButton"

        return button
    }()

Sample test

    func testExample() {
        // Use recording to get started writing UI tests.
        // Use XCTAssert and related functions to verify your tests produce the correct results.

        XCUIApplication().buttons["GOT IT"].tap()
        XCTAssertTrue(XCUIApplication().buttons["gotItButton"].waitForExistence(timeout: 10))
    }

How to automate svg to pdf automator

My buddy Dan Drzimotta showed me a really cool way to convert any svg to pdf using the following tools.

First install the svg2pdf library.

> brew install svg2pdf

Setup Automator

Then startup automator and create the following script.

Save this (i.e. svg2pdf). Then find a svg file in your finder and convert it by right clicking on it. You will now have a pdf output into that directory.

Import into Xcode

Xcode will now scale pdfs to various resolutions. To use a pdf as an image asset drag it into your assets folder and make the following changes on the image in the inspector.

How to add navigation items to the Navigation Bar iOS

When you embed your root viewController into a NavigationController, your sub ViewControllers automatically get a title bar. But they don’t get any Nav bar items.

To add something like a Welcome button for back navigation drag out a Navigation Item

And drop it into the middle of the navbar. Same for a button. Only a NavBar button is different than a Navigation item. It looks like this.

Drag this to the upper right hand corner of the nav bar and it should be OK.