IOS

I checked the information online. There are two methods:   Method 1: Use the Z plotting method: -(Void) drawText :( NSString *) text x :( float) x y :( float) y { CGContextRef context = UIGraphicsGetCurrentContext (); CGContextSelectFont (context,

The MapKit in iOS integrates many functions of the google map api and the positioning function of iOS, so that we can draw your running track to the map. This function is very useful, such as gprs tracking, personnel tracking, express tracking, and

During the development process, a large amount of data needs to be loaded. For example, the network may be frequently requested to display images. We cannot refresh the table view after loading all the images !!   How can this problem be solved? I

Add a custom title in the iPhone app navigation bar The navigator is often used in development. It is easy to add a title to the navigator as follows:Self. title = @ "Elimination phase Day 1 ";UILabel * titleText = [[UILabel alloc] initWithFrame:

Almost all data in the settings of the iphone is stored in NSUserDefaults. Imagine four data storage methods commonly used by the iphone. NSUserDefaults is indeed an ideal method to save the settings file. Compared with other methods, it is easy to

I posted a simple code for generating a plist file in C # before, but what if I want to read the plist file in turn? Is there a class library that implements such a function? The answer is yes. I found an iphone-plist-net library on the Internet in

[Cpp]-(Id) init{Self = [super init];If (self ){Self. wantsFullScreenLayout = YES;[UIApplication sharedApplication]. statusBarStyle = UIStatusBarStyleBlackTranslucent;[[Nsicationcenter center defacenter center] addObserver: self selector: @ selector (

We are used to separating data from the interface during development. This method is better, but we only need to depend on a data structure in both the data and interface, this method is a good method for decoupling.However, some details may cause

As shown in, the following describes how to use scrollView and pageControl together. 1. Add the following code to viewDidLoad:[Plain]// Define scrollViewScrollView = [[UIScrollView alloc] initWithFrame: CGRectMake (0, 0,320,180)];[ScrollView

Knowledge point: * The shouldAutorotateToInterfaceOrientation method of UIViewController is deprecated. In ios6, supportedInterfaceOrientations and shouldAutorotate are used to replace shouldAutorotateToInterfaceOrientation. Note: To be backward

1. MVC (Model-View-Controller). Cocoa Touch designers use the MVC pattern as the guiding principle and use it to split the logic method of GUI (graphical interface) application code.2. Moudle model: class for storing and processing application data (

UICollectionView, a new feature proposed by IOS6, is used in practice. It makes sense in many places. customization seems to be more flexible, so that for a large number of custom features, everything is ready, dongfeng has come. There is also a

Prerequisites: the mobile phone and computer are not connected or the Zune software on the computer is disabled (the image library cannot be accessed when connected to the Zune software). Version 7.1 You can use the PhotChooserTask method and XNA

1. Xcode has built-in GDB. You can use GDB to debug and debug the command: 1.1 po command: the abbreviation of print object, showing the text description of the object (Lldb) po [$ eax class]: Address of the output exception object (Lldb) po [$ eax

This is an old topic, which has been introduced in many places on the Internet. To sum up, there are basically two methods.1. When the network connection changes and you need to be notified, you can select Reachability. 2. If you just want to know

Some variables only need to be initialized once (for example, reading configuration parameters from the file, reading the device model, and so on). You can use dispatch_once for read optimization to ensure that only the API is called once, in the

Previously, I wrote about UILable's comprehensive parsing. UIButton's comprehensive parsing. UITextField's comprehensive parsing. They have a common parent class, UIControl, and their understanding of UIControl.This helps you fully understand the

1. In appDelegate, there are two ways to add a view to a window, [Cpp]Self. window. rootViewController = self. view;[Self. window addSubview: self. view. view]; Self. window. rootViewController = self. view;[Self. window addSubview: self. view. view]

Five classes are required (Container class), you need to use all classes managed by this container to integrate this class   Package com. metarnet. extend; Import java. lang. reflect. Field;Import com. metarnet. Injects. Inject; /***

On the ipad, how does one debug pages? In the past, when ios5 was used, you can use the developer tools in safari to open the console and view the log printing information of console. log for debugging. However, this item cannot be found after the