iOS

iOS is the mobile operating system running on the Apple iPhone, iPod touch, and iPad. Use this tag [ios] for questions related to programming on the iOS platform. Use the related tags [objective-c] and [swift] for issues specific to those programming languages.

52 votes
2 answers
2.7K views
NativeScript TextField [(ngModel)] does not work

I have a problem with data binding in TextField via ngModel I have model class export class Product { na

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Cortez
0 1 0 9
asked 07 September, 2021
55 votes
3 answers
2K views
NativeScript : custom camera view

I am working on an iOS and Android application with a custom camera view (that's why I won't use cam

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Cortez
0 1 0 9
asked 07 September, 2021
60 votes
11 answers
2K views
App not setup: This app is still in development mode

I have followed the instructions here: The developers of this app have not set up this app properly for Facebo

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Nereida
0 1 0 9
asked 07 September, 2021
59 votes
5 answers
646 views
Why the 20px gap at the top of my UIViewController?

The Problem Consider the following controller hierarchy: UINavigationController UIViewController UITableVi

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Hilario
0 1 0 9
asked 07 September, 2021
61 votes
5 answers
1.9K views
Xamarin iOS memory leaks everywhere

We've been using Xamarin iOS for the last 8 months and developed a non-trivial enterprise app with many s

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Rudolf
0 1 0 9
asked 07 September, 2021
58 votes
6 answers
2.7K views
Xamarin Visual Studio IOS Development Without a Mac?

I'm a .NET developer and want to write an IOS & Android app in C#. I've had a read around Xamari

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Brianne
0 1 0 9
asked 07 September, 2021
54 votes
14 answers
328 views
Xamarin.Forms ListView: Set the highlight color of a tapped item

Using Xamarin.Forms, how can I define the highlight/background color of a selected/tapped ListView item? (My

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Cortez
0 1 0 9
asked 07 September, 2021
53 votes
27 answers
1.4K views
ERROR ITMS-90164/90046: Invalid Code Signing Entitlements

Note: I'm developing using Xamarin. Similar question posted in Xamarin Forum here I'm creating an a

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Lynette
0 1 0 9
asked 07 September, 2021
54 votes
10 answers
2K views
Facebook SDK: app not registered as a URL Scheme

I am using the Facebook SDK found here, and am trying the sample that is provided (in the folder FacebookiOSSa

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Frederick
0 1 0 9
asked 07 September, 2021
63 votes
12 answers
2.4K views
Failed to find or create execution context for description <IBCocoaTouchPlatformToolDescription: 0x7fa8bad9a6f0>

I'm working on a project for iOS and I'm doing the programming with Visual Studios and it connects t

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Lynette
0 1 0 9
asked 07 September, 2021
48 votes
7 answers
2.3K views
Convert UTF-8 encoded NSData to NSString

I have UTF-8 encoded NSData from windows server and I want to convert it to NSString for iPhone. Since data co

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Royal
0 1 0 9
asked 07 September, 2021
61 votes
18 answers
2K views
UITableViewCell, show delete button on swipe

How do I get the delete button to show when swiping on a UITableViewCell? The event is never raised and the de

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Jesenia
0 1 0 9
asked 07 September, 2021
50 votes
30 answers
2.9K views
iPhone UITextField - Change placeholder text color

I'd like to change the color of the placeholder text I set in my UITextField controls, to make it black.

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Kristopher
0 1 0 9
asked 07 September, 2021
69 votes
26 answers
2.4K views
Presenting modal in iOS 13 fullscreen

In iOS 13 there is a new behaviour for modal view controller when being presented. Now it's not fullscre

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Joseph
0 1 0 9
asked 07 September, 2021
56 votes
21 answers
342 views
Giving UIView rounded corners

My login view has a subview which has a UIActivityView and a UILabel saying "Signing In…". This subview has

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Elicia
0 1 0 9
asked 07 September, 2021
59 votes
6 answers
721 views
What are Unwind segues for and how do you use them?

iOS 6 and Xcode 4.5 has a new feature referred to as "Unwind Segue": Unwind segues can allow transitioning

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Leonardo
0 1 0 9
asked 07 September, 2021
67 votes
17 answers
1.4K views
How to tell if UIViewController&apos;s view is visible

I have a tab bar application, with many views. Is there a way to know if a particular UIViewController is curr

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Chelsea
0 1 0 9
asked 07 September, 2021
60 votes
9 answers
1.6K views
What does the NS prefix mean?

Many classes in Cocoa/Cocoa Touch have the NS prefix. What does it mean?

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Serina
0 1 0 9
asked 07 September, 2021
62 votes
6 answers
497 views
Send and receive messages through NSNotificationCenter in Objective-C?

I am attempting to send and receive messages through NSNotificationCenter in Objective-C. However, I haven&apo

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Tana
0 1 0 9
asked 07 September, 2021
63 votes
30 answers
1.5K views
Xcode 6 Bug: Unknown class in Interface Builder file

I upgraded to Xcode 6 beta 4 and now my App continuously crashes with the message Unknown class X in Inter

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Alba
0 1 0 9
asked 07 September, 2021