Listed below are the various keyboard shortcuts in Xcode 7. Symbols corresponding to Mac keyboard used are command (⌘), shift (⇧), control (⌃), option/alt (⌥) Build, Run, Test Build ⌘ + BClean ⌘ + ⇧ + KRun Tests ⌘ + URun ⌘ + R Debug Step Over F6Step Into F7Step Out F8Toggle BreakPoint ⌘ + […]
How to programmatically add AutoLayout constraints?
AutoLayout solves the mystery when designing app for more than one screen size and for both Portrait and Landscape orientation. This is done by adding constraints to the views using various Auto Layout options available as part of Interface Builder. As an iOS developer, you can also add these constraints programmatically using NSLayoutConstraints or Visual […]
Fix for Directory not found for option error in Xcode
You might see Directotry not found for option error when opening an iOS 8 existing project in Xcode 7. This error because of the invalid path sepcifed from the Framework Path for the test target, (null): Directory not found for option ‘-F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.2.sdk/Developer/Library/Frameworks’ This can be fixed by selected the test target, navigating Search Paths and […]
iOS Swift – Firebase Demo
Firebase is a platform that allows web and mobile application to store data in cloud. In this article, we will see an example app written in Swift that uses Firebase for storing and retrieving data in real time. The source code for this demo is available under GitHub. This demo app consists of three fields […]
What is new in Swift 2.0
Lots of new feature have been introduced as part of Swift 2.0. The list includes guard, repeat-while, defer, error handling, protocol extensions, print, pattern matching, early exits, UI Testing, UI Stackview etc. Let us see some of these cool features. guard, try and catch [code language=”swift”]func printISPDetails() { let url = NSURL(string: “http://www.telize.com/geoip”) let request […]
Search photos on Flickr – Web Service
In this tutorial we will see the steps required to write a demo app that retrieves photos from Flickr based on search text and display them in a UICollectionView. This also covers how to integrate 3rd party libaries using CocoaPods. Flickr API Register your app in Flickr and get the API key details. You will […]
UICollectionView Demo in Swift
UICollectionView can be used for displaying set of data in rows and columns The main difference between UICollectionView and UITableView is that CollectionView can be display more than one column. The following topics are covered in this article Simple collection view demo Displaying data in Collection View Implementiing Custom Cell Adding Section Headers Highlighting Cell Insert […]
Adaptive Layout in iOS
Adaptive Layout was introduced in iOS 8 to address the problem of designing user interface for different devices and screen sizes. In the earlier version of iOS, we had to maintain different storyboards for iPad and iPhone and with Adaptive Layout we just need one storyboard for all the devices. Some of the main components […]