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Category Archives: Mobile
Combine Asynchronous Programming
1 Combine basics Combine is a declarative, reactive framework for processing asynchronous events over time. It aims to solve existing problems, like unifying tools for asynchronous programming, dealing with mutable state and making error handling a starting team player. Combine … Continue reading
MongoDB on Mac
1.What’s MongoDB? MongoDB is a document database which belongs to a family of databases called NoSQL – not only SQL. In MongoDB, records are documents which behave a lot like JSON objects in JavaScript. Values in documents can be looked … Continue reading
Python3 Virtualenv Setup
Install python3 brew install python3 Pip3 is installed with Python3 Upgrade virtualenv To install virtualenv via pip run: pip install –upgrade virtualenv Create virtualenv virtualenv -p python3 python3-venv Activate the virtualenv source python3-venv/bin/activate Deactivate the virtualenv deactivate
Xcode instruments
 The two columns worth noting in Instruments are # Persistent and # Transient. The Persistent column keeps a count of the number of objects of each type that currently exist in memory. The Transient column shows the number of … Continue reading
Views vs. layers
A layer is a simple model class that exposes a number of properties to represents some image-based content. Every UIView is backed by a layer, so you can think of layers as the lower-level behind the scenes class behind your … Continue reading
Xcode tips and ticks
Faster Testing When using TDD you can work more quickly by running a subset of tests – press ⌃⌥⌘G to re-run only your last test, or ⌘-click several tests to run only them. Opening Xcode If you’re in a folder … Continue reading
Intermediate iOS Debugging
1. Stop when exception 1.1 Open Breakpoint navigator (Cmd + 8) 1.2 Add Exception Breakpoint  1.3 Keep default values  1.4 Move breakpoint to User level  2. Edit breakpoint Edit Breakpoint  Add Debugger Command:  We will … Continue reading
Key-Value Observing
Key-value observing is a mechanism that allows objects to be notified of changes to specified properties of other objects. You can use key-value observing with a Swift class, as long as the class inherits from the NSObject class. You can … Continue reading
How to upload an App with universal framework to AppStore?
Cocoapods is a popular dependencies management tool for iOS development. We notice that in Cocoapods-v1.3, the framework MUST include simulator (x86_64, i386) architectures, otherwise the pod spec lint will fail and the pod cannot be uploaded to Cocoapods server. It … Continue reading
Cocoapod tips
check installed cocoapod plugin gem list –local | grep cocoapods create pod pod spec create POD_NAME https://eladnava.com/publish-a-universal-binary-ios-framework-in-swift-using-cocoapods/ Register an account by running the following, entering your full name and e-mail address: pod trunk register you@email.com 'Full Name' create pod demo … Continue reading
Hello Mobile 