iOS development (OWN) Flashcards

Question

LoginController

Answer 1

showCannotConnectError | ConnectionErrorViewController_iPhone

Answer 2

he resulting interface is stored as a .nib file, short for NeXT Interface Builder, or more recently, as a .xib file.

Answer 3

initWithNibName

Answer 4

where an object, instead of performing one of its stated tasks, delegates that task to an associated helper object.

Answer 5

When you checkout different branches, you change contexts that you are working in and you can quickly context-switch back and forth between several different branches.

Answer 6

Because the commit pointed to by the branch you merged in was directly upstream of the commit you’re on, Git moves the pointer forward. To phrase that another way, when you try to merge one commit with a commit that can be reached by following the first commit’s history, Git simplifies things by moving the pointer forward because there is no divergent work to merge together — this is called a "fast forward".

Answer 7

PlistBuddy -c "Set :CFBundleVersion $p" "$WORKSPACE/$RBS_TARGET_NAME Branding/Info.plist"

Answer 8

In Git, there are two main ways to integrate changes from one branch into another - the ‘merge’ and the ‘rebase’. In this section we will learn what ‘rebasing’ is, how to do it and in what cases it may not be a good idea to.

Answer 9

The server successfully processed the request, but is not returning any content.[2]

Answer 10

Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource. In a POST request the response will contain an entity describing or containing the result of the action.

Answer 11

This class of status codes indicates the action requested by the client was received, understood, accepted and processed successfully.

Answer 12

Test driven development

Answer 13

IMHO, this shows the real power of the GHUnit testing framework, not only does it run in the simulator but it also runs on your own iPhone, iPad, etc. Whereas OCUnit can only run as part of your build on your own machine, not on your phone and not in the simulator, this for me, is a big dealbreaker. The closer you can get your unit tests running against a real-world environment the better it will be. Why? Because you are making use of the real devices processor (not the intel x86), real memory management, or lack there-of, the real API’s etc. If my Unit tests run on my phone, i’m 99.999% certain that the code under test will actually run on, yes, you guessed it, my phone. There is of-course a downside to GHUnit, OCUnit (bundled with XCode) can be run automatically prior to you compiling your own app, this makes getting feedback about regression a lot faster, GHUnit is something which you have to run manually, in this case. But to solve that problem, or at least make it a whole lot better, we can use continuous integration aka build server to do the auto-running-of-unit-tests for us. There is a very nice blog post which compares various iOS unit testing frameworks.

Answer 14

Dropbox takes care of this by syncing (very quickly) in the background. Setup is something like this: ~/project $ git init ~/project $ git add . ~/project $ git commit -m "first commit" ~/project $ cd ~/Dropbox/git ~/Dropbox/git $ git init --bare project.git ~/Dropbox/git $ cd ~/project ~/project $ git remote add origin ~/Dropbox/git/project.git ~/project $ git push -u origin master

Answer 15

provides features that can be included in separate mobile applications. Because of that it is required to use shared and safe area to exchange user details.

Answer 16

Because keychain access depends on provisioning profile used to sign your application all of the mobile applications have to be signed with the same provisioning profile To enable shared access to the keychain for different mobile applications, all of the applications have to share the same bundle seed identifier.

Answer 17

Each application using Appbank SDK must share a Bundle Seed ID, which allows shared keychain access. This is configured within the iOS management portal, “App IDs” section. You will need the identifier value for later use in application configuration.

Answer 18

For each mobile aplication project you are required to enable and add an entitlements file to enable the application to access shared keychain. Following steps will guide you through this process. Execute them on an already created Xcode project.

Answer 19

``` You use the ^ operator to declare a block variable and to indicate the beginning of a block literal. int multiplier = 7; int (^myBlock)(int) = ^(int num) { return num * multiplier; }; ```

Answer 20

lets you easily create, encrypt, and install configuration profiles, track and install provisioning profiles and authorized apps, and capture device information, such as console logs.

Answer 21

The UINavigationController class implements a specialized view controller that manages the navigation of hierarchical content. This class is not intended for subclassing. Instead, you use instances of it as-is in situations where you want your application’s user interface to reflect the hierarchical nature of your content. This navigation interface makes it possible to present your data efficiently and also makes it easier for the user to navigate that content.

Answer 22

An instance of NSManagedObjectContext represents a single “object space” or scratch pad in an application. Its primary responsibility is to manage a collection of managed objects. These objects form a group of related model objects that represent an internally consistent view of one or more persistent stores. A single managed object instance exists in one and only one context, but multiple copies of an object can exist in different contexts. Thus object uniquing is scoped to a particular context.

Answer 23

an Objective-C library manager

Answer 24

You can think of this as the database schema. It is a class that contains definitions for each of the objects (also called “Entities”) that you are storing in the database. Usually, you will use the visual editor you just peeked at to set up what objects are in the database, what their attributes, and how they relate to each other. However, you can do this with code too!

Answer 25

You can think of this as the database connection. Here’s where you set up the actual names and locations of what databases will be used to store the objects, and any time a managed object context needs to save something it goes through this single coordinator.

Answer 26

You can think of this as a “scratch pad” for objects that come from the database. It’s also the most important of the three for us, because we’ll be working with this the most. Basically, whenever you need to get objects, insert objects, or delete objects, you call methods on the managed object context

Answer 27

Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project's build, reporting and documentation from a central piece of information.

Answer 28

Passes are a digital representation of information that might otherwise be printed on small pieces of paper or plastic

Answer 29

An app signed by the following people may run on the following devices

Answer 30

• Scoping • Programmatically • Attributes

Answer 31

Make code more asynchronous • Avoid common trouble spots • Apply patterns to Apple APIs or your own

Answer 32

``` Don’t Block the Main Thread Run in the Background Don’t Block Many Background Threads Integrate with the Main Runloop One Queue per Subsystem Improve Performance with Reader-Writer Access Separate Control and Data Flow Update State Asynchronously Move Out of Process with XPC ```

Answer 33

• No arguments • No return value • Rely on capturing variables

Answer 34

FIFO Atomic Enqueue Automatic Dequeue

Answer 35

``` void MyUpdateImageWithURL(NSImageView *view, NSURL *url) { }; MyDownloadAsync(url, ^(NSData *data) { NSImage *image = [[NSImage alloc] initWithData:data]; dispatch_async(dispatch_get_main_queue(), ^{ }); ```

Answer 36

Communicate Between Processes • Simple interface to look up services by name • Send and receive asynchronous messages • Deliver replies as blocks submitted to queues

Answer 37

• Documents ■ Text ■ Photos • Credentials • Preferences • Other ■ Photo metadata ■ Unique identifiers

Answer 38

Users are entrusting their data to your app ■ It could be sensitive ■ Assume it is and protect it • Real threats ■ Public networks ■ Lost device • Credentials are valuable

Answer 39

Calling the instance method of a null object. Accessing or modifying the field of a null object. Taking the length of null as if it were an array. Accessing or modifying the slots of null as if it were an array. Throwing null as if it were a Throwable value.

Answer 40

Add com.apple.developer.default-data-protection entitlement Use NSFileProtectionComplete as its value Can still use APIs to control per file You’ll need a new provisioning profile

Answer 41

Use NSFileProtectionComplete unless you’ve a good reason not to

Answer 42

CocoaPods is distributed as a ruby gem, installing it is as easy as running the following commands in the terminal:

Answer 43

is an Internet standard allowing a client to access scheduling information on a remote server. It extends WebDAV (HTTP-based protocol for data manipulation) specification and uses iCalendar format for the data

Answer 44

You want to use Linux and OpenSSH to automize your tasks. Therefore you need an automatic login from host A / user a to Host B / user b. You don't want to enter any passwords, because you want to call ssh from a within a shell script.

Answer 45

Base64 is a group of similar encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. The Base64 term originates from a specific MIME content transfer encoding.

Answer 46

Permanent Account Number (PAN) is a ten-digit alphanumeric number allotted by Income Tax Department. Normally it is, issued in the form of a laminated card, by the IT Department.

Answer 47

Session Initiation Protocol

Answer 48

RSA Public Key Cryptography Proof Explanation Example RSA (algorithm)