IOS

Many IOSProgramYou need to connect to the network. The program connecting to the network needs to determine whether the current network of the device is normal. The following provides a very simple network detectionCode: You only need to implement

Delete the iPad or iPhone directory/private/var/keychains/keychain-2.db file and restart the iPad or iPhone.       1. How to uninstall built-in software?First, jailbreak is required. After jailbreak, use the 91 mobile assistant to open the iPhone

Set When developing applications, you will use IOS software development kit (SDK) and xcode, that is, Apple's integrated development environment (IDE ). Xcode provides everything you need to develop the perfect iPhone, iPod Touch, and iPad

Problem description:Use an nstimer to refresh regularly, and the refreshing effect stops when uiscrollview is scratched.Solution:-(Void) settimer{Nstmer * timer;Nsdate * Date = [nsdate date];Timer = [[nstimer alloc] initwithfiredate: Date interval:

In Android, I used zxing for bar code scanning. Now I found a free and open-source bar code scanning SDK for iPhone. The following describes how to use this SDK. The free bar code is zbar and its address is: http://zbar.sourceforge.net/iphone/sdkdoc/

Multi-thread is used when parallel operations are required in the program. 1, [Self defined mselectorinbackground: @ selector (task) withobject: Nil]; 2. nsthread indicates the thread to be executed. You can use this class to encapsulate thread

Find the application, click the triangle icon under the application, and then select "Copy link" to get the link of the application. For example: Itunes.apple.com/cn/app/bai-du-wen-kuhd/id483064532? Mt = 8 Then, replace https: // With itms: // or

1 Preface This article is a temporary plug-in. Due to work requirements, the company requires that the project in xcode be generated into an IPA file for version record. because we do not have a developer account, so we need an alternative method

1 Preface When some content needs to be displayed on the screen, but the screen size cannot provide the required area, we need to consider using the uiscrollview control.2. code example Zyviewcontroller. h: #import @interface ZYViewController :

1. Difference between shallow copy and deep copy? What is the difference between shallow replication and deep replication? BytesAnswer: copy the pointer to the object instead of the referenced object. Deep copy: copy the referenced object itself.

1. The corresponding method is not found. 'Nsinvalidargumentexception ', reason:'-[testclass initevent]: Unrecognized selector send to instance 0x10011b330' 2. aviewcontroller. XIB cannot be found. It may be because the XIB name is wrong. 22:5

1. RememberBack up SHSHHttp://apple.178.com/201105/98601615115.html 2. the jailbreak methods for different versions may be different. Generally, jailbreak can be performed online. Access this URL directly using Safari and install

IOS supports three levels of thread programming, from the underlying layer to the high-level (the higher the level, the more convenient to use, the more concise) are: 1: thread; 2: cocoa operations; 3: Grand Central Dispatch; Introduction: ThreadIt

In my uiviewcontroller's XIB, the view is 3.5 (320*480. After auto-scaling is set, some interfaces are often initialized in the viewdidload method. At this time, the main self is used. view. frame, we found that the size of the frame is the same as

It looks quite simple. I added a tap gesture to uitableview and responded to a method to exit the keyboard. So I had the following code: // Added the tap gesture and clicked to exit the keyboard. Uitapgesturerecognizer * tapgesture =

Use the code to create the Segmentarray control and set its attributes: /* Segmentarray. h */# import @ interface segmentarray: UIViewController {// create control object UISegmentedControl * segment;} @ property (nonatomic, retain)

Import framework: Code: # Import # import @ interface msgplaysound: nsobject {systemsoundid sound; // system sound id value range: 1000-2000}-(ID) initsystemshake; // system vibration-(ID) initsystemsoundwithname :( nsstring *) soundname

The 4.6 series of development will be updated to the blog from the very beginning. IOS development is more complex than Android development. 1. Get the files required by IOS developers. You can view the process from the following

NextIOS sandbox mechanism and file operations for iOS Learning (1)     Let's see how to get the sandbox directory of the application. Including the sandbox directory of the real machine.   1. Get the Home Directory of the program   NSString

The UIPickerView control is often used when you select certain data for the user. Here, a simple selection data is displayed. In the UITextField input box, UIPickerView is used as the input View, use Toolbar as the button to select data. Similar to