iOS is an operating system for mobile devices developed by Apple Inc. that is currently used in their iPhone, iPod touch, iPad, and Apple TV (2nd generation) devices. It shares a lot with Mac OS X, but is optimized for touch-based interfaces. Use this tag for questions about iOS-specific code.

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Creating SwiftRechability Class in Swift 2.2

I am novice at creating independent classes for user. I have seen many Reachability library for Swift, but I need to create my own class for that. Here is my code: ...
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33 views

Creating a custom view ios [closed]

I have created a custom bar button item. It works correctly in the simulator . I would like to know if this is the correct way of creating custom views. ...
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2answers
56 views

Time manipulation for notification reminders

I'm new to programming, Stack Overflow and Code Review. I was encouraged to post this method here based on a question I posted on StackOverflow here. Let me know if you have tips for improving this ...
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1answer
46 views

Extending UITableViewCell to preserve UIView background color when selecting the cell

When a UITableViewCell has subviews with background color set, when setSelected(_: animated:) gets called, all the views are ...
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1answer
40 views

Factory pattern for image or shape marker [closed]

I'm making a photo marker application and need to make a factory pattern for marker. I think it is not very flexible and overall not good. Would you check my code and suggest what could be improved? ...
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0answers
48 views

Adapting layout for various iPhone and iPad screens using constraints and multipliers

My experience with autolayout tells me that it's very difficult to make app look good on whole variety of devices (from iPhone 4s to 6s especially). Size classes are useful with device position and ...
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1answer
55 views

Tracking a geolocation

I have created this ViewController using Swift. Its job is to track geolocation and draw a line on a map and save it to core data object. I just want some advice on ...
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1answer
47 views

Stanford developing calculator iOS app assignment

I'm currently learning Swift by following the Stanford developing iOS app 2015 lecture series. I have completed assignment 1 but am wondering if there is any improvement can be made to my code. Also, ...
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4answers
61 views

iOS SDK object to represent a place

I am building an iOS SDK to be consumed by apps. I am building an object that represents a physical place. The interface looks like so: ...
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1answer
32 views

UICollectionView button target

Within my app i have a UIButton (avatar button which shows a profileVC) within a UICollectionView this button shows up in about ...
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1answer
64 views

Sorting an array of time-specific tasks of varying importance

RULES: Strict tasks must occur at the time the user selected no matter what. Flex tasks are in a priority order. Even if there is a gap big enough to fit several flex tasks with lower priority, no ...
6
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1answer
89 views

iOS delegation design pattern

I am working on a project that has a Model-View-Presenter structure and use the delegation design pattern that has the following structure/implementation. I would love feedback. The ViewController ...
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2answers
138 views

Music player in Swift

I made a simple mp3 player that plays, pauses and stops a given song, shows the time elapsed, and has a volume control. I read the documentation and can't figure out the difference between the ...
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1answer
68 views

Using an Edit box in a table views header section to insert the values into the table using swift

Allow me to provide some context. I have a UITableViewCell that contains an EditText and a Button. This cell is then inserted into the ...
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3answers
105 views

Amanda's Relationship Tips app, with scroll performance issues

I am having some major issues with scrolling in my active app "Amanda's Relationship Tips" Under the User Advice tab: I'm using the Parse Database as a backend to pull user data. This lag is ...
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1answer
75 views

Swift menu code

I want to know what do you think about the structure of this code. If you think that there is some structural improvement to be made, tell me! Here is a github link: ...
3
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1answer
136 views

NSUser defaults cellForRowAtIndexPath

I have been going back and forth on one certain part of my code. It works, but it doesn't seem right for some reason, as I believe there must be an easier/cleaner way to implement the ...
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1answer
77 views

Using nested if statements to select textfield for update of associated label

So I have written a very simple program using a cocoa pods library to calculate the distance between different cities. Here is what the UI looks like: So I have a textfield on top for entry of ...
2
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1answer
136 views

Image Scrolling in UITableView with Parse

I'm trying to create an app that is scalable. One of the main features of the app is to view images from a database to a UITableView. Here is my code: ...
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0answers
280 views

Caching image in memory or on disk

I am caching an image locally..That same image will be used in few screens. Steps for doing this is as follows: Get image from cache If not present in NSCache, get image from Cache directory If not ...
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3answers
134 views

Loading Configurations from plist into singleton

In my iOS application, I've created a singleton class that reads a configuration plist file and provides accessor methods to easily retrieve the values: ...
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1answer
331 views

UICollectionView image gallery app

I built an app that allows users to add and remove images in a collection view. I want this to be useful online so I save the images into a database and retrieve them every time. I'm looking for ...
4
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1answer
123 views

Optimize Data Sending/Querying to Parse Swift iOS

I have a swift method that I'm using to update Parse in the backend when the button is tapped. Votes are being updated: The method acts as a voting system, incrementing a label every time it's tapped. ...
2
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1answer
686 views

Implementing the Hashable Protocol in Swift with the DJB hash function

A while back I made a custom String struct (see github repo) because of the difficulties in dealing with Mongolian Unicode rendering when using Swift String or ...
5
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1answer
341 views

Star Rating in Swift

So I needed a a star rating feature to appear in my app - it doesn't need to be interactive. I have my app connected to a database I've set up in Parse, and I've made a column for OurRatingof type ...
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1answer
144 views

Ensuring non-expired token before every request

I'm developing an iOS application where data is fetched from a third-party REST API. Each request must contain an authorization token. In order to implement this, I've written a ...
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0answers
67 views

Parsing JSON with generics

I get back two dictionaries, I need to parse through them and put in an array two objects. I think I did a very poor job and I have a feeling there is a better way to make the code more compact and ...
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0answers
256 views

Custom view for data input (in-app (non-system) keyboard)

I have made a custom keyboard that gets loaded from an .xib file. I decided to go with an in-app only keyboard rather than a system-wide keyboard because the documentation states: Make sure a ...
5
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1answer
53 views

Simple plotting abstract base class and example subclass

I came across a CocoaControl ZFPlot and wanted to extend here. I ended up writing a base class (ZFPlot shown below) as well as several extensions (ZFLine, ZFScatter, ZFBar, none shown here for ...
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1answer
79 views

Downloading and parsing data

I developed this class to download a JSON from a server, parse the result and call a delegate back on the class that called it. Since I am self started I want to know if this is a good practise. ...
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0answers
96 views

Algorithm for downloading images

I am working on a product application where user could sell/buy. This application is based on collection view. Collection view has collection cell where it displays product image thumbnail. The ...
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0answers
50 views

Quartz2D, circular slider performance optimization

I have a circular slider. Each time i move finger i call [self setNeedDisplay], get new angle to change handle position and mask arc. When i move very fast my CPU load about 70%, it's very hight as ...
5
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1answer
74 views

Optimise Code for KukuKube Game

I developed a Kuku Kube game for iOS. Each time I choose a correct different color tile, it will increase a number of tile quantity 2x2 3x3...10x10. How to optimise the code each time the tile ...
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0answers
56 views

Moves box in direction of touch, and has wraparound when reaching edge of screen

Part of me thinks that it would be simpler to ditch Apple's move API and just updated position with a timer. I know that's what I did with a JS canvas snake game I built a while ago. But I'm also ...
7
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2answers
2k views

Background execution in iOS

The following class BackgroundExecutable is to be used to take a function f and return a function ...
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1answer
150 views

Retrieving creation date from Parse.com data

I got to show the createdAt date in a message timeline, I tried to make a separate array only for dates, but don't know if it is the right path to follow. It seems ...
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1answer
296 views

Set a font for a UITextView if the font is nil or not equal to desired font

Main question I am setting a font for a UITextView that is a subview in a custom view. I only set it if the user didn't specify the font size in the Interface Builder. I have the following working ...
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1answer
96 views

Switch statement for adding/removing operands to the text part of a label

I have a switch statement with five cases, and four of them are really similar to the others. How could I properly refactor this code to eliminate the duplication of code? ...
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2answers
1k views

Removing a subview with a subview from a UIView without memory leaks

I made a custom UITextView for vertical Mongolian writing. It is made by subclassing UIView, which has a subview called ...
5
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1answer
205 views

Repeatedly check URL for change on iOS

I am wanting to constantly check a URL http://www.example.co.uk/untitled.php which will either return 1 or ...
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1answer
188 views

Reading QR Code

What I need to accomplish is matching the QR code to the one I have created. This code works, except it takes at least 30 seconds to verify that it has matched my QR Code. How can I make it faster? ...
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2answers
746 views

Recursive function to show directions for multiple locations

I have a Mapview which shows a bunch of locations (Events). Here's the code of an Event object. ...
4
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1answer
227 views

Using Grand Central Dispatch to fetch data from Parse.com and update UI asynchronously

This works, and the UI is snappy in the simulator, but since this is my first time really using GCD, I'd just like this code to be reviewed before I start using it everywhere. Note that this is ...
3
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1answer
78 views

Constraints for auto layout

I am adding some constraints for my auto layout. My method calling the methods creating the constraints: ...
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0answers
206 views

Interactive transition between view controllers

I have made an interactive transition controller in Swift in two different ways. This interactive transition controller is the parent class and I have few child classes which adapt the parent for ...
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2answers
139 views

Image-uploading

This currently works properly, but just takes too long. Some of the functions in it are necessary and need to remain, such as resizing, and double saves. But it probably has room for improvement. I ...
10
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1answer
176 views

Blurring an Image

Lately, I've been part of a team working on a utility library for iOS called Thundercats (on Github). We're about to start working on some changes and upgrades in preparation for a 2.0 release, so we ...
8
votes
2answers
375 views

iOS Utility methods for UIView

Lately, I've been part of a team working on a utility library for iOS called Thundercats (on Github). We're about to start working on some changes and upgrades in preparation for a 2.0 release, so we ...
3
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1answer
197 views

Second attempt at Hangman in Swift

I recently posted my Hangman game, and got some amazing feedback! The main thing suggested was to create a word generator that could read JSON files so that my hangman brain class didn't have to ...
7
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1answer
148 views

Hangman in Swift

I am a Java programmer trying to learn the ways of Swift. I coded a Hangman game in Xcode. I was wondering what I could improve, specifically whether I used delegation correctly and if there is ...