IOS

StatementYou are welcome to repost this article, but please respect the author's Labor achievements. repost this article and keep the statement in this box. Thank you.ArticleSource: http://blog.csdn.net/iukey Singleton is a

In iPhone 4 Development, you can use -(Void) presentmodalviewcontroller :( uiviewcontroller *)ModalviewcontrollerAnimated :( bool)Animated [Self presentmodalviewcontroller: animated: ] Method To switch By -(Void)

What is an operation form? Figure: You can see from the figure. UIActionSheet* mySheet = [[UIActionSheet alloc] initWithTitle:@"ActionChoose" delegate:self

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/

1. Use @ property and @ synthesize to declare a member variable. When assigning a value to it, add "self." To Call The setmember method of the member variable.  Directly call the member variable and assign the value to it: Member = [nsstring

I. Reading Images1. Read from resource UIImage* image=[UIImage imageNamed:@"1.jpg"]; 2. Read from the network NSURL *url=[NSURL URLWithString:@"http://www.sinaimg.cn/qc/photo_auto/chezhan/2012/50/00/15/80046_950.jpg"];UIImage *imgFromUrl =[[UIImage

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

Document directory What is a 'framework' and why are they useful? What is a 'global' framework? Building a 'global' framework Apple has invested quite a bit of time into making it easy to compile for a number of different ubuntures in xcode.

Every time Apple releases a system, developers are busy working for a while, updating xcode to adapt to the new system: for example, ios4 supports retain and requires @ 2x; for example, ios5 does not support udid; for example, iOS 6 and iPhone 5

I. Overview For iPhone touch screen processing, before 3.2UiresponderThe following four methods are provided: -(Void) touchesbegan :( nsset *) touches withevent :( uievent *) event-(Void) touchescancelled :( nsset *) touches withevent :( uievent *)

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.

Every IOS developer must be familiar with loadview and viewdidload. Although these two functions are very simple to use, however, it is very confusing to put it together with similar initwithnibname/awakefromnib/initwithcoder. I. loadview Never take

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

In PC, most apps use Windows to display content, and mobile apps are no exception. To display content on the screen in mobile apps, you must first create a window to carry content, the iOS app uses UIWindow and UIView to display

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

When creating a new project, you can set its icon and other information in her targets summary (summary: App Icons: The default Icon.png icon, with 57x57 pixels. After the application is displayed on the iPhone homepage, The bundleautomatically

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

This class is mainly used for MFMailComposeViewController. The package is OK. 1. Modify the corresponding code in the laungh function of the appDelegate class of ios: [Cpp]ViewPlaincopy // Set RootViewController to window If ([[UIDevice

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

This is the current drawing generated by calling the api. The code is simple: 1 UIImageWriteToSavedPhotosAlbum (drawImage. image, nil ); DrawImage is a UIImageView. Is the nil parameter, which can be found in the UIKit