Mobile Develop

Service or threadService is used to perform long background tasks, and threads can perform background tasks, what are the differences? Features of service 1. By default, the service is running in the main thread, and if you are taking

Android App signingAndroid requires that every Android app must be digitally signed to be able to Android to the system. Android uses digital signatures to identify the author of an application and establish a trust relationship between applications,

today is self-study, a few days ago to play the game in the teacher's lead to do it again, and today reviewed again, and then try to do a simple angrybird, in the process found some small problems, sometimes easy sloppy, less a line of code, a

-(void) Viewdidload {[Super Viewdidload];Customizing the Button controlUIButton *button=[uibutton Buttonwithtype:uibuttontyperoundedrect];Set the position and size of the button[Button Setframe:cgrectmake (50, 100, 50, 100)];Set the text of a button[

Use. NET is an executable program *.exe, which is not directly hosted into the process, but is hosted into the application domain (AppDomain). The application domain is. NET introduces a new concept, which is less than the resources consumed by the

BasisLet's take a quick look at some basic audio knowledge.At present, we need to rely on audio files for audio playback on the computer, audio file generation process is the sound information sampling, quantization and encode the digital signal

For the primary server for the first line, the average annual downtime is an important measure of its stability. Therefore, it is particularly important to recover as soon as possible after a system failure. In today's high-end servers, the CPU has

1 , how to create a controllerThere are several common ways to create controllers:(1) Create with storyboard(2) Create directlyMjviewcontroller *MJ = [[Mjviewcontroller alloc] init];(3) Specify the Xib file to createMjviewcontroller *MJ =

1. Introduction1> A symbol of the entire application, an application on a UIApplication object, using a singleton design pattern2> access to this singleton object via [UIApplication sharedapplication]2. Common usage1> set icon in the upper right

Today Bo Master has a content to draw the demand, encountered some difficulties, here and we share, hope to progress together.Today share with you the difference between Calayer and UIView:1.UIKit uses Uiresponder as the response object to respond

Like what:Nsmutabledictionary *dic = [[Numutabledictionary alloc]init];[dic setvalue:@ "haha" forkey:@ "test"][Nstimer scheduledtimerwithtimeintervatal:2.0 target:self selector:@selecrtor (onTimer:) userinfo:dic Repeats:no];On the above call OnTimer:

Method one, predicate (nspredicate) creates a regular expressionUse it to determine whether a user-entered string is legitimate:Write regular Expressions: can only be numbers or English, or both exist nsstring *regex = @ "^[a-z0-9a-z]*$";//Create

Naming rules1). class name, Interface name:Starting with uppercase, if the class name of a class consists of multiple words, the first letter of all the words must be capitalized, the word should be written as full as possible, not abbreviated,

 the Round/ceil/floorf function in iOS is slightly solvedextern float Ceilf (float);extern double ceil (double);extern long double Ceill (long double);extern float Floorf (float);extern double floor (double);extern long double floorl

When a view controller is created and displayed on the screen. Order of execution of code1, Alloc create objects, allocate space2. Init (Initwithnibname) initializes the object, initializes the data3, Loadview from the nib load view, usually this

One of the problems that I encountered in doing the project today.The expected effect is this:But in 2. What the X system gets is this:The left part of the code is as follows: stroke android:width= "0.5DP" Android:color=

1 , Multithreading ConceptsProcessA program that is in progress is called a process that is responsible for the memory allocations that the program runs. Each process has its own independent virtual memory space.ThreadA thread is a separate

More recent time more abundant, summed up the next few projects to use the UI effect, in this side to share to everyone, also give yourself a record (there will be a demo post).These are mainly the following UI effects: Various display of

1 , overviewSimilar to Uinavigationcontroller, Uitabbarcontroller can easily manage multiple controllers, easily switch between controllers, typical examples are QQ, and other applications.2 , Uitabbarcontroller the simple useUitabbarcontroller

1. Behavior of individual Raindrops2. Improve the behavior of raindrops and tectonic rain scenes3. Define properties in XML that can control rain------------------------------------------------------1. Behavior of a single Raindrop: a line segment