Mobile Develop

Calayer *sublayer =[Calayer layer]; Sublayer.backgroundcolor=[Uicolor Purplecolor]. Cgcolor; Sublayer.shadowoffset= Cgsizemake (0,3); Sublayer.shadowradius=5.0; Sublayer.shadowcolor=[Uicolor Blackcolor]. Cgcolor; Sublayer.shadowopacity=0.8;

Simple use of stepping controls in iOS Initializing the control Uistepper * step = [[Uistepper alloc]initwithframe:cgrectmake (100, 100, 100, 100)]; Sets whether the controller value continuously triggers a change @property

First, where is the block placedWe discuss the storage location of blocks for different situations: 1. Stacks and heaps Blocks are located in the heap in the following cases: Void foo ()   {      __block int i = 1024;       int j = 1;      void  (^

1 Download xmppframework this framework firstHttps://github.com/robbiehanson/XMPPFramework2 Environment Configuration Reference: Https://github.com/robbiehanson/XMPPFramework/wiki/GettingStarted_iOS1 add xmppframework frame to projectDrag the

1. Define macro to implement Max or Min. The answer for the rookie is this: #define MAX(X,Y) X>Y ? X : YVerification: when input max (1 = = 3, 2) would have expected 2, but the actual result is 0? The expert's answer is this:

-(void) Watermark {UIImage *oldimage = [UIImage imagenamed:@ "pre-prepared picture, you will be on this account image to add a watermark"];Uigraphicsbeginimagecontextwithoptions (Oldimage.size, NO, 0.0);[Oldimage drawinrect:cgrectmake (0, 0,

EditText setting Properties android:imeoptions= "Parameters"Parameter list: Actionunspecified unspecified, corresponding to constant editorinfo.ime_action_unspecified. Effect: Enter arrow Actionnone no action, corresponding constant

Internal PathEnvironment.getdatadirectory () =/dataEnvironment.getdownloadcachedirectory () =/cacheEnvironment.getrootdirectory () =/systemContext.getcachedir () =/data/data/com.penngo.test/cacheContext.getfilesdir ()

In the Android application is we often want to judge the user to return key operation, generally in order to prevent misoperation is the user repeatedly press two times the return key when the user is prompted to quit the

We know that to launch an app, you need to know the name of the app startup activity, but start the activity's action parameter so that it can be started by startactivity (Intent), such as:/** The package name of the app that was launched is

Some time ago encountered problems with the ListView and ScrollView layouts, and now provides a solutionif (ListAdapter = = NULL | | Listadapter.getcount () = = 0) { return;} int totalheight = 0;for (int i = 0; i This has a very important problem

Let's run a program to see the effect.See, Taskid=15, *89270 end of instanceThen click the Refresh button, for example, found that TaskID has not changed, but the instance has changed *bead0In the refresh once, ditto, the instance becomes

the relationship between activity and task (stack)a task is like a container, and activity is quite the thing that fills the container, the first thing (activity) is at the bottom, and the last thing added (activity) is at the lowest end. The

Background: A few days ago suddenly want to do a notebook function, a start, think quite simple ah, a uitextview, network cache also do not dry, direct local nsuserdefault storage, and then finished, art, make a few nice pictures, add a few

First, the goal1, processing 110, 10086, landline and other non-mobile phone number of the place of attribution;Second, the Code implementation1, determine whether the text in the input box conforms to the format of the mobile phone number (1, the

synchronization, without the ability to open threads: Dispatch_syncAsynchronous, with the ability to open threads: Dispatch_asyncParallel queues: Multiple tasks can be executed concurrentlySerial queue: Once a task is finished, the next task is

I. BACKGROUNDFirst of all, this requirement is very common, that is, the need for Android, Linux has open source code and very stable, want to directly porting the past use, this program is pure C code, that is, with the Android framework, Java It

First, UIApplication life cycleEach iOS application contains a UIApplication object, and the iOS system monitors the entire application lifecycle through the UIApplication object. Each application specifies a proxy object for the UIApplication

Not "smart" non-"watch", smart watch we advocate DIY"the ERA of smart hardware is coming!" ”Apple watch, a smartphone, has again sparked a frenzy of smart hardware chasing. Smart hardware has been extended from wearable devices to smart tvs, Smart

Previous blogs we've seen intent, and we've been through him to specify the jump between activity and the transfer of Data.Let's look at the following intent,intent in our application is divided into a display and implicit two ways.Show intentSee