Mandar Apte

UI/UX Designer from Mumbai, Maharashtra, India.

Articles

  • Chapter 04: Array in Swift

    What is an Array?
    An array is an ordered list with indices / Index.
    Examples of an array are a to-do list, shopping list, Amazon Wish List, etc.

    Let’s say we have an array list of apps

    Index:
    0 1 2 3

    Element:
    “Reminders” “Mail” “Xcode” “Calendar”

    Important Note:
    The index of the first element always starts with zero because the way computer scientists deal with data in memory, they have offset & offset starts with zero & that’s why the Array begins with zero. The index of an array never exceeds the number of elements.

    Here is how to declare an Array in Swift:
    We will declare an array with the let or var keyword, the identifier name, the equal sign, and square brackets. A comma separates each element.

    var apps = ["Reminders", "Mail", "Xcode", "Calendar"] // Array of Strings, Each element is of Type String
var number = [1, 2, 300, 4000] // Array of Integers, Each element is of Type Integer
var bools = [true, false, false, true] // Array of Boolean values, Each element is of Type Bool
var groups = [["John", "Tom", "Steve"], ["Brandon", "Bill"]] // Array inside array
    (more…)

    –

    by

    Mandar Apte
    ,

  • Chapter 03: String in Swift

    All About String in Swift Programming Language

    Let’s know what String is. String is a collection of characters

    Here is how to declare a String

    var courseName = "iOS Development"
var language = "Swift"

    Here is how to use functions like String Concatenation, i.e. attaching one String to a second string

    var hello = "Hello, "
let world = "World! "
let sentence = hello + world + "This is iOS Development" // "Hello, world! This is iOS Development"

    Important Note:
    As you can see above, we have used the ‘+’ operator to concatenate two strings together

    (more…)

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    by

    Mandar Apte
    ,

  • Chapter 02: Variables & Constants in Swift

    Data Types in Swift Language

    Integers i.e. Int:
    1, 2, 3, 199, 1000
    Float & Doubles:
    3.14, 1.168, M_PI
    Boolean Values like Bool:
    true or false
    Collection of Characters like Strings:
    “iOS Development”, “Apple”, “1.2”

    We can create our data type using the keywords Struct & Class.

    All About Variables

    Here is how we declare Variables in Swift:
    First, we start with the ‘var’ keyword, then ‘Identifier Name’ & ‘Initial Value.’

    Here is how to Declare Integer values: Int

    var thisYear = 2017
var ourAge = 20

    Here is how to Declare Empty Integer

    var emptyInteger = Int()

    Here is how to Declare a String

    var courseName = "iOS Development"
var language = "Swift"
var software = "Xcode"
    (more…)

    –

    by

    Mandar Apte
    , ,

  • Chapter 01: Let’s Learn Swift Programming Language

    About Swift

    Swift Programming Language is a new sensation, something happening, or the next paradigm in the computer programming world. Apple introduced Swift at WWDC, Apple’s World Wide Developer Conference, in 2014. Apple declared Swift an Open-Source Programming Language on December 3, 2015.

    Swift is getting a warm welcome from the development community as a breath of fresh air for their daily programming job.

    Swift natively supports Unicode Characters, Emojis, and Asian Languages like Devanagari Characters & Chinese Characters. Which was lacking in 30-year-old programming Languages like C & Objective-C

    Here is what others say about Swift Programming Language from Apple to Wikipedia.

    (more…)

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    by

    Mandar Apte
    , ,

  • Identify the iPhone or iPad model programmatically using Swift Language.

    You may be programming a Universal App for iPhone, iPad, or iPad Pro and wondering how to write conditional code for those variant iOS device sizes.

    So here is how to write code by identifying the device height of your display or frame.

    Here is how to solve this situation by identifying device height,

    Note:
    This code uses the native bounds of the device, so it will work for all current devices that may be in landscape or portrait mode. Code is written in Swift Programming Language.

    (more…)

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    by

    Mandar Apte
    , ,

  • Call function from FirstViewController to SecondViewController using Swift Programming Language.

    Here is the situation in your Xcode project where you want to call a method from another class Swift file to your original class of Swift file.

    Let’s call your original swift class file ‘FirstViewController’, which has ‘UIViewController’ as a superclass.

    The second swift that you want to call a function from, we will assume that it has ‘SecondViewController’ as the class name & it has ‘UIViewController’ as a superclass.

    You have written a function called ‘print something()’ in your ‘SecondViewController’ that would be triggered when somebody taps on the button present on ‘FirstViewController’ as IBAction called ‘print this(sender: UIButton)’

    So, you will write a print function as follows:

    (more…)

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    by

    Mandar Apte
    , , ,

  • Create a single PDF file by combining multiple documents using Preview on Mac.

    Preview Macintosh OS X Application Image Editing Batch Processing

    Here is a simple solution to create a single PDF by combining multiple files from various file types.

    Assumption: I Assume you have 10 PNG files you want to combine into a single PDF file.

    Note: It doesn’t matter if those ten files have different height & width dimensions.

    Here is how to do this:

    Step 01:
    Locate & Open Preview in the Applications folder on your Macintosh

    Step 02:
    Select Preview. Now go to File > Open.

    Step 03:
    Select & Open all desired files in Preview

    (more…)

    –

    by

    Mandar Apte
    , ,

  • How do you use Disk Utility to partition disks on a Mac?

    Macintosh OSX Disk Utility

    As per Wikipedia:

    Disk Utility is a system utility for performing disk and disk volume-related tasks on the macOS.

    Day-to-day functions supported by Disk Utility are:

    • Creation, conversion, backup, compression and encryption of logical volume images from a wide range of formats read by Disk Utility to .dmg or, for CD/DVD images, .cdr
    • Mounting, unmounting and ejecting external disk volumes
    • Enabling or disabling journaling
    • Verifying a disk’s integrity and repairing it if the disk is damaged
    • Erasing, formatting, partitioning and cloning disks
    • Secure deletion of free space or disk using a “zero out” data, a 7-pass DOD 5220-22 M standard, or a 35-pass Gutmann algorithm
    • Adding or changing partition table between Apple Partition Table, GUID Partition Table and master boot record (MBR)
    • Restoring volumes from Apple Software Restore (ASR) images
    • Checking the S.M.A.R.T. status of a hard disk
    • Disk Utility functions may also be accessed from the OS X command line with the diskutil and hdiutil commands.

    Now, we will learn how to partition disks,

    Important Note:

    • Partitioning a disk erases all the data previously stored on it
    • The disk utility’s partition feature divides the disk into partition sections, which appear on the desktop as separate disks.

    Precaution: Before proceeding, backup all your computer data using Time Machine on a hard drive other than the one you are currently partitioning.

    Here is how to Partition a disk

    Step 01:
    Connect the External Disk to your Mac using a USB / FireWire cable to partition it

    Step 02:
    Locate ‘Disk Utility App in Applications > Utilities

    (more…)

    –

    by

    Mandar Apte
    , ,

  • How do you change or upgrade the time machine backup hard disk without losing your old backup data?

    Here is how to transfer backups from a current backup drive to a new high-capacity backup drive

    Step 01: First, check the format of your new backup drive

    1. Connect your new backup drive to your Mac.
    2. Open Disk Utility (located in the Utilities folder).
    3. In Disk Utility, select the new drive’s icon to ensure it has a GUID partition and is formatted as Mac OS Extended (Journaled). Reformat it with the Mac OSX Extended (Journaled) option with a GUID partition. At this stage, you can format your new backup drive with Mac OSX Extended (Journaled, Encrypted) to password-protect it and thus safeguard your data. Remember to write down the encryption password you set for your drive this time.

    Step 02: Set permissions on your new backup drive

    1. Open a new Finder window. In the sidebar, click the icon of the latest backup drive.
    2. Choose Get Info from the File menu.
    3. Make sure “Ignore ownership on this volume” is deselected (unchecked) at the bottom of the “Sharing & Permissions” section of the Get Info window.
    (more…)

    –

    by

    Mandar Apte
    , ,

  • What does the Trust this Computer functionality mean, and what if you accidentally tapped on Don’t Trust this Computer and want to reset it?

    What do trust settings mean to your iOS & macOS device

    When you connect your iPhone, iPad, or iPod touch to a computer for the first time, an alert asks whether you want to trust this computer or not.

    Relationships of Trusted Devices:

    1. Trusted computers can sync with your iOS device, create backups, and access your device’s photos, videos, contacts, and other content.
    2. These computers remain trusted until you change device privacy settings or erase your iOS device.
    3. If you choose not to trust a computer, you block its access to content on your device. You’ll see the trust alert whenever you connect your iOS device to that computer.
    ios9-trust-this-computer-alert-message
    (more…)

    –

    by

    Mandar Apte
    , ,

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