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iOS Articles
Page 4 of 19
Capture picture from iOS camera using Swift
To capture pictures from a camera in swift we can use AVFoundation which is a framework in iOS SDK, but we should try to avoid using it until we need a lot of custom features in our camera application. In this example, we’ll only capture a picture from the camera and display it on the view. We’ll be using image picker in this example instead of AVFoundation.First, create a project and add an image view on its view Controller in the storyboard. Create the outlet in its class. Now inside the ViewController class conform it to −class ViewController: UIViewController, UIImagePickerControllerDelegate, ...
Read MoreHow to use images while developing iOS App in a Simulator?
Sometimes we need to test our iOS app with multiple cases and we may not have physical device all the time. For example if we need to see if image upload is working correctly but we do not have an actual iPhone then we may need to add more images to the simulator and test from there. Adding images to simulator is an easy task and can be done in a few different ways. Some of them are mentioned below.Method 1Open Simulator appSelect the image you want to addDrag and drop it in the simulatorIt will be added to the ...
Read MoreHow can I send mail from an iPhone application?
To send an email from our application we'll need to use URL Schemes and some action on event of which the email will be sent. We can not actually send email from the application, unless it is an mailing application and we use MessageUI framework of iOS, but we can open some email app from our application with prefilled email and subject.We'll see both the ways of doing this.Let's see how we can open the MAIL app of iOS with an example.Create a project and on its first view controlleradd a button and change it's text to open "open e-mail", ...
Read MoreHow to create a left-arrow button on a Toolbar on iPhone/iPad?
To create a button on toolbar we'll need to use two different components of iOS and another image that is a back arrow. Before that let's see what those components areToolbar − Toolbar is a native iOS component that is used to display items or toolbar on the bottom of screen.Bar Button item − It is a button that's usually created on a Toolbar or a navigation bar.When a toolbar is created using storyboard, it comes with a Bar button item.Let's start by creating a new project, in the main.storyboard give some background color to the only viewController we have.From ...
Read MoreHow To Change UIView's Border Color And Thickness in Cocoa Touch?
In this article we'll learn how to change a View's border color and thickness.This can be done in two ways as mentioned below.Method 1 − Writing the codeLet's suppose we have a view name backView, then to add a border color and thickness we can writebackView.layer.borderWidth = 5 // Or any integer valuebackView.layer.bordercolor = colorLiteral(red: 0.09019608051, green: 0, blue: 0.3019607961, alpha: 1) this code will add a border of 5 width and a dark blue color. Below is the output is produces.Method 2 − Creating an extension of UIView with designable and inspectable@IBDesignable class DesignableView: UIView { } extension UIView ...
Read MoreHow to download a video using a URL and save it in an photo album using Swift?
To download a video from a URL in swift we need to perform a few steps while keeping a few things in mind.Points to be noted here are, We’ll be making use of internet to download video, hence we need to allow permissions for App transport security in our Info.plistWe’ll need to save the downloaded video to Photos app, hence photos permission is required.Video should always be downloaded in background as it may prevent us from using the app if downloaded on foreground.Now, we’ll use the below code to save a video from a random link in our Device. You’ll ...
Read MoreHow to replace a character in Objective-C String for iPhone SDK?
To replace a character in objective C we will have to use the inbuilt function of Objective C string library, which replaces occurrence of a string with some other string that we want to replace it with.To create a string in objective C we need to write −NSString *str = @"tutori@als";Now we have a choice of replacing characters in this string and creating new one, or modify this same string. In this example we will modify this string and print in the next line.str = [str stringByReplacingOccurrencesOfString:@"@" withString:@""]; NSLog(@”%@”, str);When we run the above code, str is replaced with “tutorials” ...
Read MoreHow to change a button background color using Swift?
To change the background color of a button in iOS application we need to access the property ‘ backgroundColor’ of the UIButton. We can do this in two ways, programmatically and using the storyboard.Method 1 − Using the storyboard editorAdd a button on your storyboard, select it Go to it’s attribute inspector and select 'Background' property to choose the color.Method 2 − Programmatically changing the backgroundCreate outlet of the button on the View Controller.In the viewDidLoad() or viewWillLayoutSubview() method add the code to change the background color.btn.backgroundColor = #colorLiteral(red: 0.4392156899, green: 0.01176470611, blue: 0.1921568662, alpha: 1)When we run the method ...
Read MoreHow to navigate from one view controller to another in iOS?
To navigate from one view Controller to another view Controller in iOS, we need to use Navigation controller. Navigation controller manages a stack of View controller when we go from one view to another view.Navigation from one view controller to another view controller can be done like mentioned below.Step 1 − Create a View controller object.let vc = self.storyboard?.instantiateViewController(withIdentifier: "VC2ViewController") as! VC2ViewControllerIn this step we initialize an object of the type of our another view controller, to which we want to navigate. The identifier variable should be same as the identifier of our second view controller.Step 2 − Navigating to ...
Read MoreHow to use Bold & Non-Bold Text In A Single UILabel in iOS/iPhone?
To use a Bold and a regular/Non-Bold text in a single UILabel, we can either use a storyboard editor to achieve the same, or we can do it programmatically. Let’s see both of them.Method One − Editing with StoryboardSelect the label you want to edit, go to it’s attribute inspector.From the first option Text, select Attributes instead of plain.Write the following text in the label “Bold Regular”Double Click on Bold to select it, and then right click on it to see more options.Select font > Bold from that option. It should do the task.Method Two − Programmatically Achieving the result.Add the ...
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