Mobile Develop

Restatement of the problem:iOS 8 has changed the way notifications are registered, assuming the app needs to support iOS 7 and 8 at the same time, you need to check selector first.Workaround: in Xcode 6-(BOOL) Application: (UIApplication *)

In multi-person development, Ken can see a partner put unused variables, parameters in the code, or there is no implementation of the Protocol, or the use of outdated methods (common is text alignment, segmentation mode, etc.)Fortunately Xcode is a

Public classDensityutil {/*** Switch from DP unit to PX (pixel) According to the resolution of the phone*/ Public Static intDIP2PX (Context context,floatdpvalue) { Final floatScale =context.getresources (). Getdisplaymetrics ().

Please respect other people's labor results, reproduced please specify the source: Asynchronous explanation of Android Development (ii) Asynctaskhttp://blog.csdn.net/fengyuzhengfan/article/details/40212745I have described asynchronous operations

When developing applications, sometimes we need to sort out a set of unordered content, and iOS has a way to sort the nsaray in the system, and we'll compare these methods in performance:Nscomparator sortNsdescriptor sortfunction sortQuicksort

Ext.: http://www.blogjava.net/xylz/archive/2010/07/03/325168.htmlIn this summary, we focus on the principle and design idea of atomic operation.Because of the locking mechanism in the next section, the concept of locking is introduced appropriately

-(void) inittabbar{//Initialize home Homepageviewcontroller *homePag e = [[Homepageviewcontroller alloc]init]; Uinavigationcontroller *homepagenav = [[Uinavigationcontroller alloc]initwithrootviewcontroller:homepage]; Determine if there is

1. Get the height of the title barRect frame = new rect (); GetWindow (). Getdecorview (). Getwindowvisibledisplayframe (frame); int statusbarheight = Frame.top;int contenttop = GetWindow (). Findviewbyid (window.id_android_content). GetTop (); int

Android Developing NotesObjectiveFrom today onwards, I will use the Blog to record my Android development process, each time learned what, learned what, what problems and problems to solve the situation, so that every learning has meaning, as soon

I was to save the chat record locally, the use of a custom object, the data into the file format to the local, in the transfer of data format when the error, the need to first file the custom object to be transferred to the data format. Here's

1. Pour the header file#import 2. Implement the positioning protocol cllocationmanagerdelegate3. Defining positioning Properties@property(nonatomic,retain)cllocationmanager *locationmanager;4. Start positioning-(void) Locate{ // determine if the

Today just started a cell phone, but how also not connected to the computer's Pea pod (first in the mobile phone notification bar, the connection mode to USB, in the settings inside the USB debugging point), there is no way to download 91 mobile

1, the main method of drawing picturesBitmap: Picture object, left: offset to position, top: offset at topDrawbitmap (Bitmap Bitmap, float left, float top, paint paint)2, to the picture splicing and limits the display areaDrawbitmap (Bitmap Bitmap,

PX (pixels): Each px corresponds to a point on the screen.Dip or DP (device independent pixels, unit-independent pixels): An abstract unit based on screen density. On a 160-point-per-inch display, 1dip=1px. However, as the screen density changes,

two ways to manipulate a database using the Sqlite3 tool Please respect other people's labor results, reproduced please specify the Source:Android Development using the Sqlite3 tool to operate the database two wayshttp://blog.csdn.net/fengyuzhengfan/

Problem Descriptiongiven an N * M matrix with each entry equal to 0 or 1. We can find some rectangles in the matrix whose entries is all 1, and we define the maximum area of such rectangle as thi S matrix ' s goodness.We can swap any or both columns

Make sure the Cursor was initialized correctly before accessing data from itdetailed errors are: java.lang.IllegalStateException:Couldn ' t read row 0, col 2 from Cursorwindow. Make sure the Cursor was initialized correctly before accessing data

iOS development and the like and objectsOC and Java are a kind of object-oriented language, starting today I and everyone together to learn this object-oriented language OC, welcome you what problems with me to explore and learn.The OC definition

www.51cto.comAuto color changeThis article is from "Phper Xuchen-Focus on PHP Technology" blog, be sure to keep this source http://xuqin.blog.51cto.com/5183168/1565209Phone Guide page

Reprint Please specify source: http://blog.csdn.net/zhaokaiqiang19921.Android current Mainstream device resolution is 480x800,720x1280,1080x1920, units are pixels. Please focus on these resolutions when doing the interface design. 2. In the