IOS

Cocoa provides two methods for communication between IOS threads, one is mongomselector and the other is port. Let's talk about the 1st types, which are the following: 2nd are nsmachport methods.Nsport has three subclasses: nssocketport,

Step 1: add the fmdb class library to the project in the new project, Step 2: Put the. DB database in the following directory: /Users/Apple/library/Application Support/iPhone

Definition Category (Category) YesObjective-CNew features of the language to add new methods for existing classes. Limitations: 1. You cannot add new instance variables. 2. Conflict with the method name of the class. When a name conflict occurs,

Search for information Develop applicationsProgramYou need to obtain detailed technical information easily. Xcode allows you to easily find the required information during programming. Xcode quick help displays concise reference information

Currently, the vast majority of applications can be updated, and you will receive an update notification when you open the application. This is conducive to user updates. Many people want xcode to provide corresponding APIs to find the application

Open Source Address: https://github.com/robbiehanson/CocoaAsyncSocket/wiki/Intro_GCDAsyncSocket How to Use: see the specific instructions under the website. Encapsulated code; //// Clientsocket. h// Gameclientengine//// Created by Chao Zhang on 12-2-

IPhone development array sorting (array includes dictionary) 1. Sort normal Arrays: Nsmutablearray * arr = [nsmutablearray arraywithobjects: @ "0", @ "8", @ "6", @ "1", nil]; nsarray * sortedarray = [arr layout: ^ nscomparisonresult (ID obj1, Id obj2

Calayer (layer) is a rectangular area on the screen. Each uiview contains a root calayer. All the visual effects on the uiview are performed on this layer. Calayer shape features mainly include: 1. layer size and size 2. Background Color 3. content

IOS serialization and deserialization Opening 1. What is the purpose of serialization? An object-oriented program creates a complex object graph during running. It is often serialized in binary mode. This process is called archiving. binary streams

Some time ago, I went online to find out how to release the memory. However, you cannot find it. Today, I am continuously testing and viewing the parent window of the view. Nslog (@ "% @", self. View. superview. superview ); At this time, I found

During application development, the page needs to be loaded when loading data. If it is useless, there is a lack of human design. The system comes with the uiactivityindicatorview, but it lacks the text description. The loading view to be added with

1. Change the background of the cell. UIView *cellView = [[UIView alloc] init];cellView.frame = CGRectMake(0, 0, 320, 44);cellView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"xxx.png"]];cell.selectedBackgroundView =

Required * request = [required requestwithurl: [nsurl urlwithstring: @ "required"] cachepolicy: Required timeoutinterval: 30.0]; [nsurlconnection failed: Request queue: [nsoperationqueue mainqueue] completionhandler: ^ (nsurlresponse * response,

I recently encountered a problem of time String Conversion during XML parsing of Sina RSS news. The problem is: Wed, 3 Apr 2013 04:11:02 GMT (this data is obtained in the XML file) to extract 04:11:02 from this string. Note: For GMT, note that

Method 1: Use the jsonkit Library 1. First download a JSON library from the Internet; 2. Add the Library to the project; 3. The Code is as follows: Put JSON into a TXT file and nsstring Nsstring * jsonstring = [nsstringStringwithcontentsoffile:

During the development process, we often encounter a problem: when we select the input box, the keyboard jumps out and overwrites our input box. The problem we need to solve is: move the input box up so that it is above the

Codesign/users/wbw1985/library/developer/xcode/deriveddata/kamireader-plugin/archiveintermediates/kamireader/installationbuildproductslocation/applications/kamireaderr. app CD/users/wbw1985/Paul/1.1 _ Kami/kamireader Setenv

Use the hash function. # Import @ interface uiview (stringtag)-(void) stringtag :( nsstring *) Tag;-(uiview *) viewwithstringtag :( nsstring *) Tag; @ end # Import "uiview + stringtag. H "@ implementation uiview (stringtag)-(void) stringtag

This article requires a certain level of core data. For example, create a project and select a template of the master-detail application type. Name it mastercoredata. Check use core data and use automatic reference counting. Test the project on

In the previous several projects, the customer required to use the font, but IOS didn't bring this font. You can only customize the font. The following are several important steps to customize the font: 1. Download the Font Resource file (. TTF