IOS

Sets an NSTtimer to display the current time, Define NSTimer usage: Time Interval NSTimeInterval floating point type, event proxyDelegate and event processing method @ selector ();+ (NSTimer *) scheduledTimerWithTimeInterval :( NSTimeInterval) ti

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

UIQWindow defines a window object to manage views. A software can only have one window. The main function of window is to provide display for the view and send events to the view. To change the content displayed by the software, you can change the

UINavigationBar 1. The UINavigationBar class implements a control for navigating hierarchical content. 2. You can modify the appearance of the bar using the barStyle, tintColor, and translucent properties.   Adding Content to a Navigation Bar 1.

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)

Demo function: flowcover effect, positive and negative infinite loop scrolling, each cover has a separate reflection Demo Description: The FlowCover Classes folder in the project stores the core Classes. Demo diagram:     Demo main code: drawing

1 PrefaceIn the previous section, we introduced the state of program execution. From the example, we can find that there are clear policies to follow when processing these state changes. Here we will introduce them. 2. Details2.1 activity-no

First, create an IOS application project. The main file structure is described as follows: main. m XXXXDelegete. h \. m MainWindow. xib info. plist. the IOS application is encapsulated by UIKit,   IOS applications are encapsulated by uikit and

Two views targetSubview and sourceSubview are added to a view controller. TargetSubview is hidden by default, and sourceSubview is visible by default. Now, I have such a requirement. Slide your finger and drop the targetSubview from the top down to

Required header file # Include First, let's take an example of getting the current system time and explain the functions used.Sample Code:# Include # Include Int main (){Time_t timep; // defines the time_t type variable timep, the type is long int

In Xcode, the Interface Builder tool is a powerful "WYSIWYG" development tool. This topic describes the property panel and object library panel.   Object Library panel: Provides all the interface components defined by the Cocoa Touch library,

1 PrefaceThe abstract factory provides an interface for creating a series of associated or interdependent objects without specifying their specific classes or their creation details. There is no coupling between the client and the specific object

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

1 Preface In object-oriented software design, using public objects not only saves resources but also improves performance. Shared Objects can only provide some internal information, but cannot be used to identify objects. A Design pattern

1 Preface A common use of proxy is as a lightweight proxy object, which allows the client to first access some cheap information or functions. When a user is willing to pay for the real and high-price membership status, the proxy opens the door to

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

UIPanGestureRecognizer is an extension class of the UIGestureRecognizer class. Its extension classes include runtime, UIPanGestureRecognizer, and UILongPressGestureRecognizer. By using these classes, you can perform operations on a UIView object,

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.

OverviewIn IOS development, there are many animation operations, typically when the view controller operates on the seue. In the same view controller class, when loading and switching different views, animation effects are also required, and some

Image ScalingI. The Pinch gesture scales the image. That is, drag the photo with two fingers in different directions, and the photo will be scaled down or enlarged.Principle I understand: proportional Scaling Let's take a look at the following key