IOS

In iOS development, we need to share documents between applications in many cases. However, iOS provides a running sandbox for applications, and one application cannot communicate with another application directly, therefore, to share documents

Block was introduced at the beginning of ios4.0. It is characterized by the ability to execute inline and pass it as a parameter to a function. It defines block variables and ^ is used for operators. -(Id) loadNibWithClassName :( NSString *)

I. Thread Synchronization The thread synchronization method is similar to that in other systems. We can use atomic operations, mutex, lock, and so on. IOS atomic operation functions start with OSAtomic, such as OSAtomicAdd32 and OSAtomicOr32. These

I wonder if you have encountered this situation. I declare a variable array, but I cannot add data to this array. Maybe it's because I'm a newbie. To use a variable array, follow these steps: 1. Add in Declaration: @ Property (nonatomic, retain)

The idea is 1. ios downloads the zip Resource Package (images, sounds, and other zip-compressed resource packages) from the server to the local device. 2. decompress the zip file to the program directory. 3. Load resource files from the program

1. Implement the UItextFieldDelegate protocol in the Declaration File 2. Remove the keyboard in the UItextFieldDelegate protocol in the implementation file: -(BOOL) textFieldShouldReturn :( UITextField *) textField { [TextField

// Write a titleViewUIView * titleView = [[UIView alloc] initWithFrame: CGRectMake (0, 0,200, 20)]; // allocate titleViewtitleView. backgroundColor = [UIColor blackColor]; // Create UILableUILabel * titleText = [[UILabel alloc] initWithFrame:

1 Preface The observer mode is also called the publish-subscribe mode. As its alias implies, it looks like a magazine subscription. When subscribing to a magazine from a magazine publisher, the reader provides the name and mailing address to the

1 Preface You can think of a combination as an entity, which contains other entities of the same type. This structure is like a tree connected by a parent node entity and a child node entity. It is like the genealogy of the same ancestor. In the

Today, we have encountered a problem of uploading user portraits. We need to read images from the album or camera. The code is simple. Extract the key parts as follows:   /Load user image-(void) Detail {UIActionSheet * sheet; // determine whether

1 Preface In object orientation, commands are encapsulated in various command objects. Command objects can be passed and reused by different clients at the specified time. The well-designed design pattern is called the Command pattern. 2. Details

NSString * pathStr = @ "http://www.baidu.com "; AFHTTPClient * httpClient = [[AFHTTPClient alloc] initWithBaseURL: [NSURL URLWithString: @ ""]; // set the url to null HttpClient. parameterEncoding = AFJSONParameterEncoding; [HttpClient

The code for handheld or tablet devices that support different operating systems such as IOS, Android, and Ipad is as follows: one click index.html finger touch event Used to determine whether to move up or down 2. hzTouch.

//// ViewController. m // ScrollView_T1119 // Created by du jia on 13-4-8. // Copyright (c) June 2013 dujia. all rights reserved. // # import "ViewController. h "@ interface ViewController () @ end @ implementation ViewController-(void) viewDidLoad {

How to select an image filter for Iphone First of all, when you are doing a selfie software, this function will be involved, that is, adding a filter to the image, such as black and white, retro and other effects, to make the photo show different

Directly run the Code:     On cellForRowAtIndexPath:UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];CGRect frame = CGRectMake(0.0, 0.0, image.size.width, image.size.height);button.frame = frame;[button setBackgroundImage:image

How to quickly read and compress the data in the video card into a video in ios extended development Mobile Phone platform performance is a key issue. The compressed video is divided into three steps: Read video card data, compress with encoder,

1. Delete:-(Void) tableView :( UITableView *) tableView commitEditingStyle :( UITableViewCellEditingStyle) editingStyle forRowAtIndexPath :( NSIndexPath *) indexPath{If (editingStyle = UITableViewCellEditingStyleDelete){NSLog (@"....");NSUInteger

1. nil: Generally, it is assigned to an empty object; 2. NULL: It is generally assigned to NULL values other than nil. Such as SEL; Give me a chestnut (so heavy ~) : [NSApp beginSheet: sheetModalForWindow: mainWindow ModalDelegate: nil // pointing

  This article is based on Rich Text: DTCoreText [Cpp]# Import # Import // Add this framework @ Interface UIPasteboard (AttributedString)-(Void) setAttributedString :( NSAttributedString *) attributedString;@ End # Import # Import // Add this