Mobile Develop

Singleton mode is a kind of common software design pattern. In its core structure, it contains only a special class called a singleton class. The singleton mode can ensure that there is only one instance of a class in the system, and the instance is

The iphone sandbox model has four folders, what is the location of the permanent data store, and what is the simple way to get the path to the emulator.Documents,tmp,app,library.(Nshomedirectory ()),The manually saved files are in the documents file.

For today's mobile devices, the user experience on the mobile side is an important point of concern.Read some of the online knowledge about mobile interaction and user experience, summarized here. If there are deficiencies, we hope that we can

Time is fleeting, the university's journey has come to an end, in the summer vacation, I came to * * * training iOS.Just arrived here, life is not very accustomed to, but in the teacher's help, I slowly adapted here, here the study atmosphere is

Warningmultiple annotations found at the line:-consider adding android:paddingstart= "1dip" to better support right-to-leftlayouts-when define paddingleft You should probably also define paddingright for right-to-left symmetryThe warning code is as

Restrict entering only certain values including numbers, letters, etc.Android:digits= "0123456789ABCDEFGHIGKLMNOPQRSTUVWXYZ"The above line of code can be any of your restrictions, you can only enter what is written on it, it is written only can

The principle of handler in AndroidI. Principle of handler:The relationship between 1.Handler, Looper and MessageQueue.(1). Handler class: sends a message to the MessageQueue message queue, receives the message returned by the Looper, and processes

How do I make multiple selections in iOS?The basic idea is to set a flag bit for the data bound by the cell,To identify whether the cell is selected,If selected, modify the flag bit to Yes,and add the selected rows to the variable arrayIf the flag

Expression arrangement mjviewcontroller.m//01-Emoji////Created by Apple on 13-11-24.//Copyright (c) 2013 itcast. All rights reserved.//#import "MJViewController.h"/* 1.adjust .... method to remove the 2nd parameter----add: (BOOL) Add (Cannot

A common function, to be sorted out, to avoid writing every timeParameter return value resolution:Parameters:*a:int*, the first variable that needs to be exchanged for a value;*b:int*, the second variable that needs to be exchanged for a

The main idea is to create a blank file with the size of the target file, and then segment the data into this blank file.You can get the exact size of the file in the server by sending a head request, and then split the length into chunks of data

How do I get information such as the computer BIOS serial number, manufacturer, version number, and name? I remember, I can use it.WINAPI and ASM obtain BIOS hardware information, but Yes, I don't know. the as What to do, Caishuxueqian no waythen

First, the CSS code is as follows:. switch {position:relative;margin:20px Auto;height:26px;width:120px;Background:rgba (0, 0, 0, 0.25);border-radius:3px;Box-shadow:inset 0 1px 3px rgba (0, 0, 0, 0.8), 0 1px rgba (255, 255, 255, 0.3);Background: #444;

We all know that you can view information about your application in the Android settings--and one of the functions is to clear the cache.watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvd2fuz2jpyw9ob21l/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/

The first type:Using both the setdrawingcacheenabled () and Getdrawingcache () methods, the first is to set whether the cache is turned on, and the second can directly get the cache in ImageView. It is generally necessary to set the

Resources are very important in the Android system, and the resources commonly used are strings,colors,bitmaps and layouts , so you can modify the values of these files without having to recompile the program. There are a lot of resource types in

First, keyboard notificationWe often need to do certain things when the keyboard pops up or hidden, so we need to listen to the state of the keyboardWhen the keyboard state changes, some specific notifications will be sent to the

iOS Development Check Update#pragma mark - 检查更新- (void)checkUpdateWithAPPID:(NSString*)APPID{    //获取当前应用版本号    NSDictionary*appInfo = [[NSBundlemainBundle] infoDictionary];        NSString*currentVersion = [appInfo objectForKey:@"CFBundleVersion"]; 

GCD (Grand Central Dispatch) is a technology developed by Apple to optimize concurrent operations in multicore environments and replace traditional multithreaded programming patterns. Support for GCD starts after Mac OS X 10.6 and iOS 4.0.One reason

Summarize:1. Note that the following XXX is the project name2.xcode Enter archives, Select the packaged version, show in finder, Open Package contents, dsyms,xxx.app.dsym, Show Package contents, contents,resources,dwarf,xxx3. Copy xxx into the crash