Mobile Develop

1.plist attribute List>1. Applicable to: Only some of the classes brought in from the foundation framework, such as: Nsstring/nsarray/nsdicionary/nsset/nsnumber/nsdata>2. The Writetofilexxx method of the calling object can be written to the file>3.

    /**     * Check whether the device  is connected, and if so, whether the connection      * is wifi or mobile  (It could be something else) .      */    private void checknetworkconnection ()  {       ConnectivityManager connMgr =           

If the following error occurs in the Logcat log: Java.lang.IllegalStateException:The application ' s Pageradapter changed the adapter ' s contents without calling pageradapter#notifydatasetchanged! Expected adapter Item count:0, Found:4

Setting the layout file in Res/layoutHint property: Prompt for input informationText property: The difference from hint---hint is just a hint;Text is the actual contentIntroducing the layout XML file into the activitySetcontentview

1- (void) Setupgetsinnav2 {3Uigesturerecognizer *gesture =Self.interactivepopgesturerecognizer;4gesture.enabled =NO;5UIView *gestureview =Gesture.view;6 7Uipangesturerecognizer *poprecognizer =[[Uipangesturerecognizer alloc] init];8Poprecognizer.

Some of the most commonly used controls in iOS development, such as textfiled and TextView, automatically eject the keyboard when clicked, but the hidden operation requires our own coding. One of the most common methods is to let textfiled and

1, installation Ubuntu14.04Download Ubuntu system, official website address, download from ubuntu10.04-ubuntu15.04, download desktop and server version according to your needs.General virtual machine recommended to install desktop version, easy to

Timepickerdialog 　 Android Datepickerdiaolog is a pop-up time management window, datepickerdiaolog description of the month-day time; Unlike Timepickerdiaolog, Timepickerdiaolog describes the specific time of day, Timepickerdiaolog has two means,

Knowledge popularizationThe status bar on iOS means the top 20-pixel high section.The status bar is divided into two parts, to distinguish between the two concepts, the following will be used: foreground part : Refers to the display of

application: The global scope, the entire application share, is the same webapp share in the deployment file, with a lifecycle of: application start to stop. Session Scope: When the user first accesses a new session, the server can remember the

1. Will the activity's ondestory () be called when activity is closed? There are situations where the system will simply kill the activity‘s hosting process without calling this method (or any others) in it, so it should not be used to do things

In Android asynchronous message processing, new Handler() { @Override publicvoidhandleMessage(Message msg) { // } };But when we write this, the compiler gives a warning prompt: The handler class should

Summary of common errors and warnings in development (26)Error hintsOne: # error[__nsarraym Superview]: Unrecognized selector sent to instance 0X7FF953507B10 I forgot to load the firstobject inside the xib. Two: note:If the

1. The bottom-up implementation of multithreading(1) First answer what is thread1 processes to perform a task, you must have a thread. Threads are the basic execution unit of a process, and all tasks of a process (program) are executed in the thread(

I. Previous use of Uipopovercontrollerare used only on ipad1 /**2 * Uipopovercontroller can only be used on ipad, on, iphone use will crash3 */4-(void) Old5 {6VC2 *VC =[[VC2 alloc]init];7 8 Uipopovercontroller*popover =[[Uipopovercontroller

Haha bo master recently only to broadcast, write some blog to spend time by the way to summarize the knowledge, things are more basic hope to improve each other------------------------------------------------------------------------------------------

protected void OnDraw (canvas canvas) {//TODO auto-generated method Stubsuper.ondraw (canvas);//construction of two brushes, one red, one green paint Paint_green = Generatepaint (Color.green, Style.stroke, 3); Paint paint_red = Generatepaint

Datepickerdiaolog　　 Android Datepickerdiaolog is a pop-up time management window,datepickerdiaolog description of the month-day time ; Unlike Timepickerdiaolog, Timepickerdiaolog describes the specific time of day, Timepickerdiaolog has two means,

Model cell#import @interface ImageCell : UICollectionViewCell@property (nonatomicNSString *image;@end#import "ImageCell.h" @interface imagecell()@property(Weak,nonatomic)Iboutlet Uiimageview*imageview;@end @implementation Imagecell - (void)

1. ReviewThe previous implementation:(1) Ontouchlistener Realization of the upper and lower left hand gesture recognition(2) Ontouchlistener + Simpleongesturelistener + gesturedetector to realize the upper and lower left hand gesture recognition2.