Mobile Develop

In the C-system language, you can use #if or #ifdef something like a compilation conditional branch to control which code needs to be compiled, and which code does not. There is no concept of macro definition in Swift, so we cannot use #ifdef a

In the process of viewing the Android source code, just look at the code, often there is no way to verify that the estimation of the code is accurate, then we often by inserting their own log to test whether a function is called, the value of a

Problem:You want to improve the efficiency of gradle construction.Solution:Use the recommended technology portfolio below.Discuss:First, there is no suggestion that can affect the performance of your app. There are a lot of things you can do to

The purpose of this configuration section is to add a map of the URLs to the Web program so that the user accesses the mapped URL (such as/PAGE/AAA) and also accesses the effect of the source URL (such as/page/pageaaa.aspx). This is also the URL

Concept of incremental update:When the version of the app installed on our phone is inconsistent with the latest version of the server, the traditional practice is to re-download and install a new version of the APK file, but this is a way of

Class: A class is an abstract concept that has the same attributes and behavior as a class of elements.Distinguish between a class or an object to see if it can continue to be subdivided.In OC, a class is a struct that represents an object type, and

First, IntroductionWhat is the annotation, do not understand can first read my previous article.In Android, annotations are mainly used to do a few things: and the compiler to give you some hint warning message. With some Ides, it is

Ext.: http://www.cnblogs.com/irelands/p/3433628.html1. Introduction to Touch EventsThe Web page mouse on the PC generates onmousedown, onmouseup, onmouseout, onmouseover, onmousemove events, but on mobile devices such as iphone, ipod Touch, The

Dialog does not display when the app is logged on on Android 7.0, but the translucent background displaysAfter searching and comparing, it was found that the problem was caused by rewriting the getresources () method.1 /**2 * Settings app does

Mobile app grab crawler 1. items.pyclass DouyuspiderItem(scrapy.Item): name = scrapy.Field()# 存储照片的名字 imagesUrls = scrapy.Field()# 照片的url路径 imagesPath = scrapy.Field()# 照片保存在本地的路径2. spiders/douyu.pyImport ScrapyImport JSONFrom

First, Introductioncocoa is the native object-oriented API that Apple created for Mac OS x, is one of the top five APIs on Mac OS X (the other four are carbon, POSIX, X11, and Java). Apple's object-oriented development framework, which is used to

Recently, the information forwarded by the news, found that most of the theoretical knowledge, very few complete code. Now in the form of code to explain the image:Create a project with Xcode1. Normal method invocationCreate a class person code as

#pragma mark-Gets the Chinese text in a string+ (nsarray *) Getastringofchineseword: (nsstring *) string {if (string = = Nil | | [String isequal:@ "]) {return nil; }nsmutablearray *arr = [[nsmutablearray alloc]init]; for (int i=0;

Debugging Android program sometimes requires adb shell command, ADB full name Android Debug Bridge, is to play the role of the Debug bridge.With ADB we can debug the Android program via DDMS in Eclipse, which is the Debug tool. ADB communicates with

On iOS 5.0 and later, iOS added new properties and methods to the Uiviewcontroller class: 123456 @property (nonatomic,readonly)   Nsarray *childviewcontrollers -  ( void -  ( void ) Removefromparentviewcontroller -  ( void

#import#ifndef __iphone_5_0#warning"This project uses features only available in IOS SDK 5.0 and later."#endif//__OBJC__ This macro, which is defined by default in all. m and. mm Files#ifdef__objc__/ / If this global header file or macro only

The progress bar component is one of the important components of Android. When a program executes in the background, the foreground progress bar dynamically shows the percentage of program execution progress. It is a long-time program that allows

(in general, these two parameters can be provided for development, if for some reason it is not available, and you only install the package, you can get it by the following steps)Step One:Connect the real machine or open the Android emulator and

UU Farm Game system development (SU Nian. 188.1414.7927)UU Farm app Development UU Farm source code development UU Farm model development of UU Farm, 14, a batch of simple and rough H5 small game, to the phenomenon of product name, fire all over the

Written in the previous words:Less can implement a programmatic CSS, before using stylus, now to learn what is not the same place it ~Second, the CSS pre-compilation processing less (less Chinese web, online compilation tool). less file, passing the