How to add UITextField, UITextView and UILabel programmatically in swift 4.0

In iOS app development, sometime we need to add Textfields, textviews, labels etc programmatically. It gives you control over customizing styles, size and position of them. I’m going to place codes (swift Language) here so that you can get all of them from one place.
Following codes will work in any view controller
UITextField:
TextView:
Label:

 

How to customise UITextField in SWIFT 4.0?

Requirements:

Operating System: OS X 10.9.4+

IDE: Xcode 9

Level: Beginner to intermediate.

In my previous article I showed you how to customise UIButton. Here I’ll discuss about changing the look and feel of Text Field (UITextField)

As usual Open Xcode and create a new project. A dialog box will appear for selecting template. Choose single view application and press next.

Screen Shot 2014-09-14 at 2.05.25 PM

In the next box, type Product name. I typed Custom TextField. I’ve also used reverse of my website’s domain name com.webindream as Organization Identifier. You must choose Swift as language and press next.

Custom TextField

From next dialog box select the location where you want to save the project and press “Create” button.

Screen Shot 2014-09-14 at 2.11.39 PM

Now open Main.storyboard from Project Navigator (If you can’t see project navigator in the left side of the screen, press Commad+O). You will see a blank View Controller in the workspace window.

TextField3

 

 

Now drag and drop a TextField element from Utilities panel (If you can’t see Utilities Panel, press Command+Option+0) to the View Controller of the workspace (See above figure – bottom right corner). One more thing, don’t be confused with UITextField and UITextView.

  • UITextField: UITextField object is a control that displays editable text and sends an action message to a target object when the user presses the return button.”
  • UITextView: “The UITextView class implements the behavior for a scrollable, multiline text region.”

(Source: StackOverflow.com)

Press Command+N (or File > New > File) to add a new file to the project. From template chooser box select Swift file and press next. Screen Shot 2014-09-14 at 2.24.46 PM

Type MyCustomTextField as file name and create the file.

TextField1

Open MyCustomTextField.swift file and get ready to edit.

import UIKit as UITextField is a child class of UIKit.

import UIKit

Write a new subclass of UITextField and name it “MyCustomTextField”

class MyCustomTextField: UITextField {

}

We’ve to override init(coder aDecoder: NSCoder!)  function.

init(coder aDecoder: NSCoder!) {

super.init(coder: aDecoder)

}

First of all we’ll make the corners of the TextField round.

To do so, write the following code inside init(coder aDecoder: NSCoder!) function.

self.layer.cornerRadius = 5.0;

Now change the border color and border width with help of following 2 lines:

self.layer.borderColor = UIColor.gray.cgColor

self.layer.borderWidth = 1.5

To change the background colour of the Text Field modify backgroundColor property of UITextField:

self.backgroundColor  = UIColor.blue

The colour of the text that we write inside the Textfield can be changed as follows:

self.textColor = UIColor.white

You may be curious to customize the colour of the cursor that blinks when the TextField is focused. Don’t worry, you can do this too:

self.tintColor = UIColor.white

Finally, our whole code will look like :

 

Now, you’ve to attach this custom class with your button. Let’s do them in 3 steps.

Go to Storyboard and select the button.

From Utility panel select the Identity Inspector.

In the class box Type MyCustomTextField

Nothing is changed? No problem, press Command+R (or Product > Run) to run the application on simulator.

Voila, you’re done.