Programmer Group

All specifications for programming languages, if not written here, are in Apple's documentation: Objective-C programming language Cocoa Basic Principles Guide Cocoa Coding Guide iOS Application Programming Guide Catalog Point grammar spacing Conditional judgement ternary operator error handling Method variable name Notes init and deallo ...

Problem description When you are working on a project, you encounter a flashback problem. Looking at the code logic, you can see that the following code causes crash. - (IBAction)buttonTouchUpInside:(id)sender { TestTableViewController *vc = [[TestTableViewController alloc]init]; } Yes, you did not read it wrong. The code above will cau ...

Change from: Ren Bo'an Brief Book Chatting Recently, I've been chasing after Qingyun Zhi. I always feel that TV plays are not as wonderful as novels. Yes, the acting skills of the big cafes are amazing and the adaptation of the plot is compact, but it has to be said that many things can not be achieved by acting alone. The protagonist's hea ...

The knowledge about Android's customized view is an unavoidable knowledge module for both interviews and in-depth study. Some of the open source controls we use are hundreds of lines of code, which makes it difficult for us to customize the view. But when we read articles like Guo Lin, Ren Yugang, a well-known blogger, explaining customized vi ...

Problem description The system requires the establishment of a library management system, which has the functions of storage, update, query, statistics, ranking, output, and book borrowing and booking. Through this subject, we can master the data type, programming statement, function definition and invocation meth ...

AVAudio Player is mostly used for music broadcasting in Objective-C. It has many advantages: (1) Music of any length can be played; (2) It can be played circularly; (3) The playing time can be controlled; (4) The volume of the vocal tract can be controlled to achieve stereo effect; (5) The volume can be adjusted.   But AV ...

Summarize the process of using canvas fingerprinting Requirement Analysis Tips pictures are not posted, wait for me to test to post to you, upload pictures is very troublesome, find a quick way to mark down; Number of points Whether to land Landed. Record userId to determine whether to praise Not logged in 1:Problems wil ...

Many app projects now have the need to embed html, so there are many benefits in designing products. An HTML can run on many platforms at the same time (android, ios, web side). From an android perspective, the component used to load html is webview. We all know the benefits of webview: 1. It can display and render web pages directly. 2. Dir ...

Reprinted from: http://blog.csdn.net/lodypig/article/details/51872595 Unity Special Path Resources StreamingAssetsPath PersistentDataPath DataPath Synchronous loading Core function Unable to load synchronously on Android platform Example Asynchronous loading Core function Example WWW Asynchronous Loading Resource loading ...

Introduction: When dealing with network resources, mobile applications usually do offline caching, among which picture caching is the most typical, and SDWebImage is the most popular offline caching framework. However, offline caching will occupy the storage space of mobile phones, so the cache cleaning function has basically become the ...