Comparison of the Available iOS Charting Libraries In this post, I explore four of the available iOS charting libraries and investigate the features, API, and pros and cons of each. In order to conduct a fair investigation, I have developed a comparison framework which loads historic stock market data from the Yahoo Finance API. My findings were that Core Plot had a strong set of documentation, yet was a little light on features and built in functionality. The Framework The framework can be easily extended to display the data fetched in different view controllers that can be set up to use various charting libraries. Framework Library / API Usage Rather than generating random data or using the same hard-coded data every time the comparison was run, stock market data is fetched from the Yahoo Finance API in CSV format . Framework Structure The framework is based around a Data Transfer Object (DTO) named StockPriceDataContainer. The Data Manager has two operations which fetch data to display in the framework. The Libraries Core Plot iOS:Chart
How Much Does It Cost To Develop an App | iPhone App Development Costs Table of Contents Types of AppsApp Development ProcessDevelopment CostsDesign CostsTotal CostsFree iPhone App Quote Overview In the past two years, the app market has exploded. In under 9 months the Apple store reported over a billion downloads, and then doubled that number in half the time. And for good reason. The good news? Let’s talk about what goes into getting an app developed. Types of Apps You Can Develop There are many different kinds of apps you can develop. Basic table functionality – think about this as a hierarchy: opening screen has big topics and you click one and you now have a set of new lists to click on. The type of app you want to develop may change based on how much content you have and how much control you want to have over the entire process. App Development Process The app development process can be broken out into four major parts – idea, layout and planning, design, and going live. 1. 2. 3. 4. iPhone App Development Costs iPhone App Design Costs Total App Costs Carter
Programming with Objective-C: Encapsulating Data In addition to the messaging behavior covered in the previous chapter, an object also encapsulates data through its properties. This chapter describes the Objective-C syntax used to declare properties for an object and explains how those properties are implemented by default through synthesis of accessor methods and instance variables. If a property is backed by an instance variable, that variable must be set correctly in any initialization methods. If an object needs to maintain a link to another object through a property, it’s important to consider the nature of the relationship between the two objects. Although memory management for Objective-C objects is mostly handled for you through Automatic Reference Counting (ARC), it’s important to know how to avoid problems like strong reference cycles, which lead to memory leaks. Properties Encapsulate an Object’s Values Most objects need to keep track of information in order to perform their tasks. Declare Public Properties for Exposed Data
How much revenue can I get from iAd? As for 1, I was in the same situation as you. Since I went with iAd only and the ad only actually gets displayed for users in countries where iAd is available, I decided I had to put a limitation on the app as well as ads. My app is a webcam viewer, and the free version limits the number of webcams you can add, disables slideshow mode (one of my favorite features from the paid version) and disables import/export/saving images support. I made it clear in the app with a popup on launch that these features are available for $1. At first I thought maybe I don't even need to encourage them to upgrade because the iAd revenue from lots of users could be better than the one time $0.70 revenue if they buy my app. If I were you, I would put some limitations on the ad based version but make those limitations relatively minor so the user can still enjoy the free app, just give them a good incentive to upgrade as well. As far as where the ads can be displayed, I'm not sure.
ios - What kind of leaks does automatic reference counting in Objective-C not prevent or minimize Macintosh Performance Guide: Latest News Why mobile web apps are slow I’ve had an unusual number of interesting conversations spin out of my previous article documenting that mobile web apps are slow. This has sparked some discussion, both online and IRL. But sadly, the discussion has not been as… fact-based as I would like. So what I’m going to do in this post is try to bring some actual evidence to bear on the problem, instead of just doing the shouting match thing. You’ll see benchmarks, you’ll hear from experts, you’ll even read honest-to-God journal papers on point. Now I am going to warn you–this is a very freaking long article, weighing in at very nearly 10k words. I write in part because this topic has been discussed–endlessly–in soundbyte form. A quick review My previous blog post documented, based on SunSpider benchmarks, that the state of the world, today, is that mobile web apps are slow. Now, if what you mean by “web app” is “website with a button or two”, you can tell all the fancypants benchmarks like SunSpider to take a hike. Why?
How To Make an iPhone App iOS 7: Hidden Gems and Workarounds - iOS 7 - objc.io issue #5 When iOS 7 was first announced, Apple developers all over the world tried to compile their apps, and spent the next few months fixing whatever was broken, or even rebuilding the app from scratch. As a result, there wasn’t much time to take a closer look at what’s new in iOS 7. Apart from the obvious great small tweaks like NSArray’s firstObject, which has been retroactively made public all the way back to iOS 4, there are a lot more hidden gems waiting to be discovered. Smooth Fade Animations I’m not talking about the new spring animation APIs or UIDynamics, but something more subtle. An interesting detail is that _UIBackdropView (which is used as the background view inside UIToolbar or UIPopoverView) can’t animate its blur if allowsGroupOpacity is enabled, so you might want to temporarily disable this when you do an alpha transform. The edge antialiasing property can be useful if you want to replicate the animation that Safari does when showing all tabs. Blocking Animations to: Pagination
iOS App Programming Guide: App Design Basics If you are new to developing iOS apps, you might be wondering where the app development process starts. After devising your initial idea for an app, you need to turn that idea into an action plan for implementing your app. From a design perspective, you need to make some high-level decisions about the best course of action for implementing your ideas. You also need to set up your initial Xcode project in a way that makes it easy to proceed with development. If you are new to developing iOS apps altogether, spend some time familiarizing yourself with the basic concepts. Doing Your Initial Design There are many ways to design an app, and many of the best approaches do not involve writing any code. The goal of your initial design is to answer some very important questions about your app. Of course, the most important thing you can do before starting your initial design is read iOS Human Interface Guidelines. Learning the Fundamental iOS Design Patterns and Techniques
Technical Q&A QA1747: Debugging Deployed iOS Apps Technical Q&A QA1747 Q: How can I debug a deployed app without Xcode's debugger? A: Once you have deployed your app, either through the App Store or as an Ad Hoc or Enterprise build, you won't be able to attach Xcode's debugger to it. To debug problems you'll need analyze Crash Logs and Console output from the device. For more information on writing rich NSLog statements, see Improved logging in Objective-C. Getting Crash Logs and Console Output Getting Crash Logs and Console Output With Xcode Even though you won't be able to run the app in Xcode's debugger, Xcode can still give you all the information you need to debug the problem. 1) Plug in the device and open Xcode 2) Open the Organizer window and select the Devices tab 3) Under the DEVICES section in the left column, expand the listing for the device 4) Select Device Logs to see crash logs or select Console to see Console output Getting Console Output Without Xcode 1) Plug in the device and open iPhone Configuration Utility
The Complete iOS8 and Swift Course: Learn by Building 15 Real World Apps by Mr Rob Percival *** Now Updated for Xcode 6.1*** From the creator of The Complete Web Developer Course (the most popular and best reviewed course on Udemy ever), comes The Complete iOS8 and Swift Course: Learn by Building 15 Real World Apps. Looking to boost your income as an app developer? The Complete iOS8 and Swift Course is THE most comprehensive, cost-effective and career-enhancing mobile app development course you’ll find on the web – or your money back. It’s a one-stop-shop for everything you need to start creating professional mobile apps that engage users, call them to action, and ultimately make you money! Not only that but you’ll get unlimited web hosting for one year (worth $200), and a copy of my ebook How To Earn $10,000 While Learning To Code, rated 5-Stars on Amazon. If you’re looking for a genuinely effective course that equips you to build stunningly presented apps that will start earning you cash, I personally guarantee this is the number one course for you.
Text Kit Tutorial Note from Ray: This is an abbreviated version of a chapter from iOS 7 by Tutorials that we are releasing as part of the iOS 7 Feast. We hope you enjoy! The way that text is rendered in iOS has changed a lot over the years as more powerful features and capabilities have been added. This latest iOS release brings with it some of the most significant text rendering changes yet. In the old days before iOS 6, web views were usually the easiest way to render text with mixed styling, such as bold, italics, or even colors. Last year, iOS 6 added attributed string support to a number of UIKit controls. In iOS 6, text-based UIKit controls in iOS 6 were based on both WebKit and Core Graphics’ string drawing functions, as illustrated in the hierarchical diagram below: Note: Does anything strike you as odd in this diagram? Attributed strings in iOS 6 were indeed helpful for many use cases. However, this year in iOS 7 there’s an easier way. Ready to create something of note? Getting started Dynamic type