IOS

Xcode is updated to 4.6 and supports IOS 6.1. The latest version 4.6 is released. The new version adds a compiler warning to identify potential bugs caused by the use of arc and weak references. The analysis function supports deeper objective-C and

If your app uses coredata technology, crash will occur when you modify the DB field and upgrade it to the new version. because only the application app is upgraded, the DB files in the update directory are not. If it is under development, you only

When developing the map app, we found that the SDK did not set the map zoom level. To display the map, we set its center point and then use a span to control the display area, you will ask, what is span? In fact, it is also related to latitude and

There are a lot of delegate ideas in IOS programming, and many beginners do not understand what delegate is. Delegation ModeIt is a basic technique in software design patterns. In the delegate mode, two objects are involved in processing the same

In the software testing phase, to collect more bug information, you can create a crash server to collect crash logs so that technicians can fix them easily. Some information is collected:

In web development, running horse lights are often used to display notifications. This is also true in game development. The followingCodeSegment can achieve the effect of running the horse lights in iOS, [Labelshow sizetofit]; cgrect frame =

Just throw your plastic protractor away if you have an iPhone! I think you wowould never have to use traditional protractors any more! Since here is a muchBetter tool for you to measure angles, that is your iOS device and of course, with the amazing

Avaudioplayer is the most basic audio player class in avfoundation. framework. It is similar to mpmediaplayercontroller in some basic operation functions, such as play, pause, and volume. The difference is that avaudioplayer does not have a queue.

Many apps have related settings in IOS settings, such: Through this setting, you can easily modify some basic settings of the application. To fully implement this setting function, you need to solve the following problems: 1) Write settings

Here is a very practical tips. When developing applications, we often use nslog to debug our programs. As the project grows, the log output for debugging becomes difficult to manage. When releasing the official version, we must block all background

After we finish helloword, we will learn some of the simplest and most practical controls. 1. Implementation of uialertview: The effect is as follows: 2. the difference between uiactionsheet and uialertview is that they are used to prompt the user

1. llvm3.0 must be used to use arc. llvm3.0 has a powerful new feature called automatic reference counting. After this option is enabled, llvm will automatically help developers to manage the memory manually during the compilation phase. At the same

Object-c   // Hide the keyboard with a touch screen Did end on exit calls the following events. When you click return on the keyboard, the keyboard is hidden. -(Ibaction) textfieldshouldreturn :( uitextfield *) textfield { // [Sender

IOS programming multi-view application experience after completion The development platform using xcode is different from the development platform using C ++ builder: 1. xcode creates a window-base project similar to a Forms Application project

  Summary:In iOS, you can directly call a message of an object. One of the two methods is receivmselector: withobject. The other is nsinvocation. The first method is relatively simple and can complete simple calls. But for processing two parameters

1. Start nsxmlparser To use nsxmlparser, you must first create it and set various attributes. The following methods are used: Initwithcontentsofurl creates a parser through nsurl InitwithdataCreate a parser through nsdata, for example, xmlpaser =

Recently, I have been studying the application of online playback, The main idea is 1. Knowledge about cfnetwork. framework is required for HTTP data download. 2. Learn about audio file stream service and audio queue service in audiotoolbox.

A basic IOS sound playback Support class. You can check if there are not many comments. #import #import #import @interface Sound_Base : NSObject{ float volume; BOOL is_turnON; AVAudioPlayer *mainMenuMusic_Player;

From the end of last summer vacation to the present, it is almost a year before I develop IOS. From the very beginning, I did not know anything. Now, most of the tasks can be combined with each other. During this period, I have experienced many

Recently I have been reading some open-source projects. One of the pop-up menu quadcurvemenu seems pretty good. Unfortunately, you can only bring up the menu in the upper right corner, so I modified it and implemented the pop-up menu in eight