IOS

Objective-C introduction, objective-c Introduction Few will think of Objective-C, which has a long history and actually affects many other programming technologies. For example, the Java programming language and Objective-C have a lot in common. The

Dark Horse programmer-C Study Notes-first c language program,-C Study Notes   ------- Ios training, android training, and java training. We look forward to communicating with you! ---------- I. The first C Language ProgramSource code: Compile the

[Code Note] Two icons in the title. when clicked, the page jumps and the title jumps. I ,. 2. Engineering Drawing. Iii. Code RootViewController. h #import @interface RootViewController : UIViewController{ UIButton * leftButton; UIButton *

New Feature of iOS: iOS 8.x-Main Content: application extension, manual focus, Size Class   IOS8.4 no API change IOS8.3 Apple pays ApplePay Metal (OpenGL) Metal IOS8.2 Apple Watch AppleWatch Watch Development Kit framework WatchKitFramework

New Features of iOS: iOS 9.x-Main Content: Apple pen API introduction, iPad multi-task enhancement, application slimming, application Transmission Security, Swift Enhancement     IOS9.1 Dynamic Photo Album LivePhotos Support Apple pen support

IOS long-press control and iOS long control Preface On the Internet, we can see that the effect of a button's long-pressed control is good. A diamond increases from the center to the two sides. Principle In red, the view is placed on the control.

IOS UIAlertController and uialertcontroller In Xcode's iOS9.0 SDK, both UIAlertView and UIActionSheet are replaced by UIAlertController. In iOS 9, UIAlertController is functionally the same as UIAlertView and UIActionSheet. UIAlertController

The ios icon of a real machine is distorted. Problem description: iPhone 5S, the icon pixel is 30*30, there is no problem in the simulator, when the real machine shows the icon edge will have a jagged distortion effect. When the image pixel is

Uipangesturerecognizer conflict on uiscrollview, pangesturerecognizer Recently, a uipangesturerecognizer was added to the cell imageview in tableview, and it was found that the image view was first rolled. When it was dragged up, tableView did not

UIVIew: neon implementation, uiview neon implementation //// AppDelegate. m // nihonuplactice // # import "AppDelegate. h "# define kColorValue arc4random_uniform (256)/255.0 # define kScreenWidth [UIScreen mainScreen]. bounds. size. width # define

Seven gestures in the UI and seven gestures in the UI 1 // 2 // GestureRecognizerViewController. m10 11 # import "GestureRecognizerViewController. h "12 # import" UIColor + RandomColor. h "13 @ interface GestureRecognizerViewController () 14 {15 16

IOS-local text Fault-Tolerant Search Engine 2 --> how to search Chinese in English (first letter, Chinese pinyin ?, Ios-2 --1. Preface I would like to say a few words. Recently, the smog in Beijing is so big that I can't resist the attacks. You must

The iOS label is adaptive Based on the display content. 1-(void) setupLabel {2 // preparation 3 UILabel * textLabel = [[UILabel alloc] init]; 4 textLabel. font = [UIFont systemFontOfSize: 16]; 5 NSString * str = @ "2222222222222222222222222222222222

Objective-C: 10-NSDate and NSDateFormatter, objective-cnsdate NSDate NSDate time class, inherited from NSObject, whose object represents a time point NSDate *date = [NSDate date]; NSLog(@"date = %@", date); 19:08:00. 624 OCNSDate [2955: 309612

IOS ----- running in the background, ios ----- running in the backgroundBackground running When the application enters the background, the system automatically calls back the applicationDidEnterBackground: Method delegated by the application. In

IOS ----- use NSOperation and NSOperationQueue to implement multithreading and nsoperationqueueMultithreading using NSOperation and NSOperationQueue The basic theories of NSOperation and NSOperationQueue are as follows. NSOperationQueue

IOS proxy protocol and ios proxy Protocol Proxy, also known as the delegate proxy, is a common design mode in iOS. As the name suggests, it delegates the tasks of an object to other objects. So other objects are the proxies of this object, instead

IOS development Demo similar to upload AvatarCode: Items in tablvew in front of the image Selector -(Void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {// image selector UIImagePickerController * imgPC =

IOS checks whether the array is empty, and iOS checks the Array   Some people say that it is possible to use ([array count] = 0) to determine whether it is null. It is a pitfall. If array is empty, an error will be reported directly when count is

IOS_Swift_enum Enumeration Method    Enum Type: Int {case A = 1 case B = 3 // common method func toString ()-> String {var info = switch self {case. a: info = A case. B (): info = 3} return info} // static method static func toString (let type: