IOS

April 21, 2016 Baidu iOS intern online pen Questions & programming questions, 2016 ios 1. How many steps can a person go up one, two, or three steps at a time? Idea: first establish a mathematical model, set up three steps to go I, two steps to go j

[Code Note] compares two time strings and notes strings. I ,. Ii. Code. -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view. [self initTimerCompare] ;}# pragma-mark-functions // comparison time-(void)

IOS fun talk design model-notification, ios fun talk Design Model [Preface] A design mode of iOS, the Observer mode (also called publish/Subscribe, namely Publich/Subscribe mode ). Observer mode, which includes notification and KVO

Xcode7 and ios9 adaptation path After upgrading xcode7.2 from xcode6.x, we found that we had to do a bunch of things for adaptation, otherwise the previous project could not run well. I. Change the database All databases with the dylib suffix must

A little bit of knowledge about variable arrays and small knowledge about variable Arrays Recently, an error occurred while using the variable array of iOS. The error message is: Reason: '-[_ NSCFArray removeObjectAtIndex:]: mutating method sent to

ArcGIS Runtime SDK for iOS (6) --- geospatial Geometric Analysis and Operations (medium) 2016.4.18 Wuhan yinqingBy SevenJohs.Overview Implement the buffer and cut operations. Content: Buffer cut -Buffer [buffer]:-In the last section, the buffer

Problems with IOS beginners (2) problems with UIImage image loading,Problem generation process: Put image resources inAssets. xcassetsIn, the methods imageNamed and imageWithContentsOfFile of the UIImage class are used to obtain the image object.

Swift learning: Swift programming tour-Sets of Collection types (7) and swiftsets Sets are unordered values of the same type. You can use Sets to replace arrays when order is not important, or if you need to appear the same value only once in the

In some cases, the system automatically adjusts the contentInset and uiscrollviewinset of UIScrollView.   Scenario If a controller (ViewController) is managed by the navigation controller and its first sub-control is UIScrollView, the system will

Production of iOS CocoaPods PodsWith the development of iOS, more and more developers begin to use CocoaPods to manage their third parties. When using Pods, I was wondering if Pods could help me more and change my development style. The following

IOS study notes 26-Video PlaybackI. Video You can use two frameworks to play videos on iOS:1.MediaPlayerFrameworkMPMoviePlayerControllerAndMPMoviePlayerViewController2.AVFoundationIn the

Core animation-transfer animation, core animation Transfer Transfer Animation: CATransition Attribute introduction: ① Type: animation effect of transition Animation KCATransitionFade cross fade transition The new kCATransitionMoveIn view is moved to

IOS app sharing Extension There are several common methods to share content between different apps on the iOS platform:The first is to use AirDrop to share documents and data between apps of different devices;The second type is to define a URL

IOS uses GCD for countdown and iosgcd for countdown During APP development, countdown is often required. For example, the voice verification code countdown... the code is as follows: 　　 _ Block int timeout = 100; Dispatch_queue_t queue =

IOS develops GET and POST request methods (NSURLConnection) and iosnsurlconnection The main protocol used by Web Service is HTTP, that isHypertext Transfer Protocol. HTTP/1.1 defines eight request methods (OPTIONS, HEAD, GET, POST, PUT, DELETE,

Introduction to IOS zz2d and iosquartz2dQuartz2D introduction (relevant applications will be available in the future) Part 1Draw a straight line Sample Code: -(Void) drawRect :( CGRect) rect {// obtain the graphic context CGContextRef cxContext =

Custom progress bar /** Initialize a progress, the size of the outer layer of aFrame. The color of the outer layer of aFrameColor is the gap between the color of the outer layer and the color of the outer layer. **/-(id) initWithFrame :( CGRect)

Problems with beginner IOS (1): Problems with beginner ios Error warning: Warning: Unsupported Configuration: Scene is unreachable due to lack of entry points and does not have an identifier for runtime access

Learning animation-transforming CGAffineTransform and CATransform3D CGAffineTransform affine deformation Cg: Core GraphicsAffine: Affine; Transform: change, make... Deformation; conversion.~~~~ Have you noticed these things ~~~~~NS: next step. It is

The block code block reversely transmits values, and the block code transmits values. Block Code blocks are also called closures. Similar to C functions, block code blocks provide reverse value transfer and callback functions. There are two block