what ios ipad 2 have

What changes have been made in iOS 10 ?, Ios10 changesWhat changes have been made in iOS 10? This post is enough for the most comprehensive trial. Apple officially released the iOS 10 operating system at the WWDC 2016 Conference. iOS and macOS, tvOS, and watchOS have built

The interview was asked on the iOS bug, I mentioned the binding click event Bug, but did not tell the problem very clearly, here to clean up the idea.This bug is only available on iOS, including Ihone,ipad, because the iOS browser uses the Safari kernel, so the iOS browser i

Most of them are replies from the cocoatouch community. The blue font is my supplement. IOS interview series: IOS interview Basic Questions for iOS (1) Basic Questions for iOS (part 3) Basic Questions for iOS (4) 1. Difference between shallow copy and deep copy?

1. What is the difference between using the weak keyword and comparing assign?2. How do I use the Copy keyword?3. What is the problem with this notation: @property (copy) Nsmutablearray *array;4. How do I make my own class use the copy modifier? How do I rewrite the setter with the Copy keyword?What is the nature of [e

...... Alas, html5 is a good app, and games are not efficient. I don't know why you think that iOS and Android will have no chance after the rise of HTML5. I don't think this is a technical problem. On mobile devices, Native apps and Web apps are only technically different, and there is no difference in business models. Apps Are mainstream on touch screen smartphones. What if you write it in HTML 5? Do you

In front of the delegate, notification and KVO, and the actual use of the steps, we can not help but have a question, their function is similar, then in the actual programming, how to choose these methods?On the internet to see a blog detailed analysis of the differences between the three and their respective advantages, the blog address is http://blog.shinetech.com/2011/06/14/ delegation-notification-and-observation/, because the blog is written in English, the following translation into Chines

-use languagesActionScript is a simplified version of Java. I can't compare ActionScript with OC, but it is definitely easier to use than Java. Related comparison can see this: http://www.zhihu.com/question/19762068/answer/15544195 5. You can use ane To do what OC can do.The ANE plug-in technology used by air allows you to use OC to develop some local plug-ins and call it through APIS, so that you can do things that air cannot do. As I will mention l

About the development framework, according to the information retrieved on the internet, I feel that the ios game development framework of cocos2d-x is very good, and there is a strong portability, so I plan to try it. As of this article, the latest cocos2d-x version is v3.0 stable version (just released a few days ago), for: http://www.cocos2d-x.org/filedown/cocos2d-x-3.0-cn The installation method is as follows: 1. decompress the compressed p

Wmpoweruser, a famous foreign blog, published an article titled Pradeep Viswav today. The article lists the content stolen from WP on iOS 6 and the features that WP8 needs to steal from iOS 6. Let's take a look. Apple has completed its usual tricks, and their fans are amazed. They released iOS 6 and published those "world-changing features" to change everything a

above Code uses arc.Xcode-> Targets-> Build Settings-> Objective-C Automatic Reference Counting: set NO to disable arc. 2. What types of xCode projects are created for the appeal interface?You can create any Xcode project and write the above Code. You can also create a Static Library project for iOS-> Framework Library-> Cocos Touch Static Library. 3. How can I

Application class is initialized as the default value. You can use the custom UI Application subclass instead of nil. As for the second parameter nil, how can I create another UI Application proxy class object with the UI Application object? Here we need to explain that the UI Application object is to manage the entire life cycle of the program. In fact, it does not do anything specific, it is only responsible for listening to events. When actual work is required, it is handed over to the UI Ap

IOS basic 2: Use of UIStepper (Counter)This is a control that appears only after iOS5. It has been used in projects. Therefore, UIStepper is a control similar to UISwitch, but there is a plus sign and a minus sign on both sides of the control.The control looks similar to UISwitch and consists of two buttons. A button is "+" and a button is "-" to jointly control the increase or decrease of the same value.In

constant, if the request for more space than the stack of space, will be prompted overflow. Therefore, the space available from the stack is small. Memory is automatically allocated by the system and is fast and does not cause memory fragmentation 2. Heap Area The heap area is allocated and released by programmers, and if the programmer does not release it, it may be recycled by the operating system, such as Alloc in

previous versions of IOS , a large number of gradients made it difficult to do so, but now the flattened navigation bar can easily be scaled up to twice times the size of the canvas used as the app's debut effect. Using the animation navigation bar and the page bar can easily scale out, occupy the entire screen, and then give way to the actual use of the application. What's more, it doesn't make you feel awkward or awkward, it's completely natural.Th

-exported Iosproject does not use arc by default, so none of the above code uses arc.Xcode->targets->build settings->objective-c Automatic Reference Counting set No, that is, turn off arc.2. What type of Xcodeproject is created for the appellate interface?You can create random xcodeproject. Write the code above.You can also create Ios->framework Library->cocos T

costly because they need to interact with the kernel. 2. Create a thread 1. Use NSThread There are two possible methods to use NSThread to create a thread: 2. Use POSIX Multithreading Mac OS X and iOS provide methods to create threads using POSIX thread APIs Based on C language support. This technology can actually be used by any type of applications (including

not use ARC by default, so none of the above code uses arc.Xcode->targets->build settings->objective-c Automatic Reference Counting set No, that is, turn off arc.2. What type of Xcode project is created for the appeal interface?You can create any Xcode project and write the code above. You can also create Ios->framework Library->cocos Touch Static Library proje

real machine in the same network segment, and then run your app, select your device in reveal, wait a moment, your reveal will appear the corresponding UI, such as "Successful Run Results"The interface is shown (my device is the ipad). Use cmd+r shortcut keys to refresh your reveal interface.Non-jailbreak real machine debugging is the most troublesome, before the real machine can also use breakpoints to debug, and now can not be used. No longer tangl

]; } -(void) reachabilitychanged: (nsnotification*) Note { reachability * reach = [Note object]; if (![ Reach Isreachable]) { Self.notificationLabel.text = @"Network unavailable"; Self.notificationLabel.backgroundColor = [Uicolor Redcolor]; Self.wifiOnlyLabel.backgroundColor = [Uicolor Redcolor]; Self.wwanOnlyLabel.backgroundColor = [Uicolor Redcolor]; return; } Self.notificationLabel.text = @"network available"; Self.notificationLabel.backgroundColor = [Uic

Copyright belongs to the author.Commercial reprint please contact the author for authorization, non-commercial reprint please specify the source.Management policyLinks: http://zhuanlan.zhihu.com/Foundation/19569459Source: Know2014-07-07 Update: Apple fully uses instancetype instead of ID in iOS 8Steven Fisher: It's good to use instancetype as long as a class returns its own instance.@interface Foo:NSObject - (id)initWithBar:(NSInteger)bar; // initiali