IOS

Image stretching, mostly used for bubble in chat, increases with the increase in font width. However, to ensure that the corners remain unchanged, only the middle part is stretched. Two methods are used:1. (UIImage *)

I. Software InstallationDownload and install the Xcode development tool from the appstore. The latest version is 4.5.1. 2. Use Xcode to compile a test scriptNote: If you are running a test case on the IOS simulator, you must have the source code of

This article will create a sample project, run it and probe the memory, and find that the UI control that is supposed to be reclaimed by garbage collection is not recycled. It is further found that the control cannot be recycled due to

First, we will introduce the simplest method: Call the call Function [[UIApplicationsharedApplication] openURL: [NSURL URLWithString: @ "tel: // 10086"]; Call the SMS function [[UIApplication sharedApplication] openURL: [NSURL URLWithString: @ "sms:

Crash is often caused by EXC_BAD_ACCESS errors during iOS program development. When such errors occur, Xcode will not give us too much information to locate the error source, only the Delegate application leaves a message like Thread 1: Program

1 PrefaceStoryboards is a powerful tool in IOS. It sets a screen as a scenario and presents all the content and associations to us. Today, let's get familiar with its operations. 2 Operation Procedure2.1 create a project    2.2 click storyboards

During iOS development, plist files are often used. What is a plist file? Its full name is Property List, which is an attribute List file used to store serialized objects. The property list file extension is. plist, which is usually called a plist

In the latest IOS project, the selector is used in several places. For example, the commonly used regional selector (province, city, and district) has implemented a custom Dialog on the android platform. However, I am not very familiar with IOS. I

Static LinkingIf you find the reference in the obj file during ld, the binary code of this reference will be added to your program in libary.The static link program is a truly complete and runable program. You only need the OS kernel to call this

  The distance between two fingers is enlarged or reduced.   Use-(void) touchesMoved :( NSSet *) touches withEvent :( UIEvent *) event. TouchesMoved runs whenever the finger moves on the screen.   1. Check the number of fingers NSArray *

This article will only introduce caching content into the memory, and the next article will introduce caching content on the iOS disk. The purpose of using the cache is to allow the application to respond to user input more quickly and to run the

1 PrefaceIOS4 provides background processing to run applications in the background. In some cases, you can even run applications in the background after you press the Home button. 2. DetailsIn IOS, you can click the Home button to pause the

In ios development, the ARC mode is enabled and the system automatically manages the memory. If block is used in the program, pay attention to the memory leakage caused by circular reference. I have encountered a problem over the past few days. When

Images, such as backgrounds, icons, logos, and buttons, are used in many IOS apps. These images can be created using the UIImage object, but you must specify a specialized container component-UIImageView for the image.     UIImage Is an object that

// Check the front and rear cameras BOOL cameraAvailable = [UIImagePickerController isCameraDeviceAvailable: enabled]; // The Front BOOL frontCameraAvailable = [UIImagePickerController enabled: enabled]; // The back // check the CoreLocation.

. Add the required library xxx. ttf to the project. Note that it must exist in copy bundle resources. If not     2. Add fonts provided by application to the info. plist file. The default value is array. You can also use dictionary to add xxx. ttf as

How can I internationalize an iPhone project? Is it necessary to write a source code in English and a source code in Chinese for the same project? Actually, this is not necessary. We can use the iPhone multi-language support to implement local

  I. Method Introduction 1. + (id) fileHandleForReadingAtPath :( NSString *) path; open a file to prepare for reading   2. + (id) fileHandleForWritingAtPath :( NSString *) path; open a file to prepare for writing   3. + (id)

  1. When using JSON to parse the service on the server side, a request URL must be provided. This URL sometimes needs to pass some parameters. If these parameters are English or numbers, the request will fail. [Plain]NSString * urlString = @

In Xcode, When you update your certificate and re-compile your program, the real machine debugging will always show Code Sign error: provisioning profile 'xxxx' can't be found will be annoying to you. The following describes the solution to solve