what is ios

Extra-Long Caution entry list: Dznemptydataset (UI, empty table view graphic operator) Pdtsimplecalendar (ui,drop-in calendar component) Magicalrecord (Core data assistant that implements active recording mode) Chameleon (UI, color frame) Alamofire (Swift Network) Textfieldeffects (UI, text area for custom skins) Gpuimage (fast picture processing) Irate (get user reviews) Gamecentermanager (Quick Management Game Center) Pkrevealcontroller (UI, swipe sidebar menu)

What is the difference between Retain and Copy in IOS? iosretaincopy 1. Readability: readonly and readwrite@ Property (readwrite,...) valueType value;This attribute is the default attribute of the variable. If you (readwrite and readonly are not used, your variable is the re

throws an exception.This macro validates a parameter for an objective-c method. Simply provide the parameter as the condition argument. The macro evaluates the parameter and, if it is false, it logs a error message that includes the parameter and then raise s an exception.If you define a preprocessing macro, the Ns_block_assertions assertion is forbidden. All the breakpoint macros return void.Assertions

What is the difference between ASI and AFN?1. Performance (Focus)* ASI based on the underlying cfnetwork framework* AFN based on nsurlconnection* Operating performance: ASI > ASN2. Processing server data1> AFN: Automatic parsing based on data returned by the server* The server returns JSON data, automatically converted to nsdictionary or Nsarray* The server returns XML data and

throws an exception.This macro validates a parameter for an objective-c method. Simply provide the parameter as the condition argument. The macro evaluates the parameter and, if it is false, it logs a error message that includes the parameter and then raise s an exception.If you define a preprocessing macro, the Ns_block_assertions assertion is forbidden. All the breakpoint macros return void.Assertions

What is the difference between @ synthesize and @ dynamic in iOS? synthesizedynamic OC object-c in order to make java developers accustomed to using the. operation, you can use the @ property variable in the interface class to declare the attribute. However. the attribute declared in h must be in. use @ synthesize or @ dynamic in m (it

1. Thread synchronization is multiple threads accessing the same resource at the same time, waiting for resource access to end, wasting time, inefficient, serial execution of tasksThread Async: Access resources while idle wait while accessing other resources, implement multithreading mechanism, execute task 1.2.3 mode in parallelUse GCD's primary queue. Use Nsoperationqueue to set the maximum number of threads (concurrency) to 1 1.1.1How

First, create the PCH file. Click Command+n. such as OperationNaming conventions are generally: project name-prefixStep TwoOK, you have finished making the PCH file here. Then you can use it.PCH files generally write data that can be used globally.Like what:The width and color of the screen (no punctuation behind the macro)#define RGB (r,g,b,a) [Uicolor colorwithred: (r/255.0) Green: (g/255.0) Blue: (b/255.0) Alpha: (a)] #define SCREEN_W [ UIScreen mainscreen].bounds.size.width#define Screen_h

The difference between Android and iOS app testing :1. AndroidLong PressHomekey to call out the app list and switch apps, then right-swipe to terminate the app;2, multi-resolution testing,AndroidEnd -Variety,iOSless;3, mobile phone operating system,AndroidMore,iOSless and cannot be degraded, only one-way upgrade; newiOSthe repository in the system is not fully compatible with the lower version of theiOSappl

Wen/Sima Jian (book author)/articles have been censoredThe original link: http://www.jianshu.com/p/8537dac37852 copyright belongs to the author, reprint please contact the author to obtain authorization, and Mark "Jane book author". In the iphone's view, is actually one view, a layer of view above a layer of view, a view above a group of views, even UIWindow is a view, on the Internet to find a picture can

1 PrefaceI've always thought that GitHub is a must for programmers, programmers should not know that GitHub is right, I was in touch with GitHub also probably work for more than a year to start learning to use, I have a lot of readers are beginners, and there are many students in school, so will not use GitHub is not surprising.2

What is difference between nsnotification and protocol? (The difference between the notice and the agreement?) ）I think we all know how to use this thing, but the deeper thinking may be less, it is well known that the agent is one-on, but the notification can be many-to-many. But why

This document tags: heap sort php php algorithm heap sorting algorithm two fork heap data structure /c12> REST server What is a heapHere the heap (binary heap), refers to not the stack of the heap, but a data structure.The heap can be regarded as a complete two-fork tree, and an "excellent" property of a complete binary tree is that each layer

What is an IOC container? What is the use? What is facade? What is the use of IOC containers? What