Category: Mobile

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 revolves around three main types: publishers to emit events over time, operators to asynchronously process… Continue reading Combine Asynchronous Programming →

 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 objects that have existed but have since been deallocated. Persistent objects are using up memory,… Continue reading Xcode instruments →

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 content. A layer is different from a view (with respect to animations) for the following… Continue reading Views vs. layers →

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 see the following output: 7.89903245455977 7.890427382096 7.87502883137136 7.87004694731339 or Add Log Message  ScreensFromBottom: @screensFromBottom@… Continue reading Intermediate iOS Debugging →

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 use these two steps to implement key-value observing in Swift. Add the dynamic modifier and… Continue reading Key-Value Observing →

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 shows error as follows: xcodebuild: fatal error: lipo: -remove's specified would result in an empty… Continue reading How to upload an App with universal framework to AppStore? →

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 pod lib create SwiftKit pod spec lint --verbose ...... pod trunk push SwiftKit.podspec https://s3.amazonaws.com/elasticbeanstalk-us-east-1-564874457370/SwiftKit.zip check… Continue reading Cocoapod tips →