IOS

Layer conversion and dedicated layer for iOS core AnimationIOS affinetransform is a CGAffineTransform, which is characterized by the fact that the sides of the transformed graph are still parallel, including round (CGFloat

Detail consideration and implementation of the circle of friends comment function, details of the circle of friends comment function1. circle of friends The layout of the circle of friends is very easy, and there are a lot of similar code on the

Use of Reveal, use of Reveal   First, download the Reveal tool. Reveal: http://revealapp.com/download. The Download page is shown in. Select the Download Trail blue button to Download the file:       2. Create a new project as a Demo for Reveal

Add and delete friends for XMPP and add friends for xmpp In the current communication service, there are various standards, so there will be a lack of connectivity, and the emergence of XMPP (Extensible Message and presence Protocol) Protocol, the

Simple use of FMDB, simple use of FMDBCommon FMDB classes: FMDatabase: A single SQLite database used to execute SQL statements.FMResultSet: Execute to query an FMDatabase result set, which is similar to the android Cursor.FMDatabaseQueue: this class

IOS-Purchase type view Custom purchase type view Code // Payment page format-(UIView *) CellForRowAtRow :( NSInteger) row {UIView * itemView = [UIView viewWithFrame: CGRectMake (0, 0, viewWidth ()-20, 45) andBkColor: [UIColor clearColor]; NIDASSERT

Copy, kvc, and kvo in iOSThere are two methods to copy an object.Copy: returns an immutable copy.Only NSString to NSString must be copied in shortest mode, and others must be in deep copy mode. Deep copy object: Specifies the shortest copy pointer.

Common shortcuts in Xcode Various new Shift + comand + n create an xcode Project Option + command + n create Group Command + n create a file Search Shift + command + o Command + f Control tabCommand + t create a tab Command + w close tab Hide

IOS Block usage   # Import ViewController. h/*One of the biggest advantages of using Block is that you can access external variables at any time in the code Block.For example. A code block is defined in a method in the class. you can directly. the

Simple image stretching and simple image stretching The initial image size is 25*28 pixels. Now we try to create two buttons on the Root   UIButton * button = [UIButton buttonWithType: UIButtonTypeCustom]; Button. frame = CGRectMake (50,100, 25, 28 )

Text horizontal scrolling in IOSText horizontal scrolling in IOS The IOS marquee achieves uninterrupted horizontal text scrolling. The sample code is as follows:  ViewController. h #import @interface ViewController : UIViewController{

IOS multi-thread shell picking ------ operating giant ProgrammingBasic multi-thread implementation solution: pthread-NSThread-GCD-NSOperation Pthread multi-platform, can be transplanted to C language, requires programmers to manage lifecycle

Introduction and use of Grand Central Dispatch (GCD) for iOS multi-thread programmingIntroduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of

Basic knowledge of IOS development-fragment 18, basic knowledge of ios-Fragment   1: understanding of the initWithFrame Method 1. What is the initWithFrame method? The initWithFrame method is used to initialize and return a new view object based on

IOS UITableView dynamically hides or displays Item and iosuitableview Hide and display items by changing the height of items to be hidden   1. Create UITableView #import "ViewController.h"@interface ViewController ()@property(nonatomic,

IPhone development overview ### IPhone development overviewSandbox in iOS is a security system that specifies that an application can only read files in a folder created for the application, you cannot access contents from other places. all non-code

IOS dispatch_sync (dispatch_get_main_queue (), ^ {}); cause of deadlock 1: -(Void) viewDidLoad { // Dispatch_sync (dispatch_get_main_queue (), ^ {// NSLog (@ 3 );// Cause of deadlock// 1: dispatch_sync is waiting for the block statement to be

Variable parameters in iOS Processing Method# Variable parameters in iOS Processing Methods I recently wroteCustom dialog boxTo simulate the implementation of the system's UIAlertView.Variable parametersI encountered a small problem, So Google wrote

Example of sliding switching between multiple table views in iOS development (similar to the "toutiao" client) --- optimization (1), ios example A few days ago, I published a blog titled sliding switching examples of multiple table views (similar to

IOS development-UI from entry to entry (1), ios-ui I. UI Overview (1) UI (User Interface) User Interface, various page elements that users can see; (2) iOS App = Various UI controls + business logic and algorithms; (3) to develop an exquisite