IOS

Ios Development notes, ios development 1. We all know that c # java has an entry main function, but swift does not have it in the code. But if there is main. swift, let's take the entry of the program in this file! In addition, files cannot be

[Reading Notes] iOS network-HTTP-request content, ios-http- 1. GET method. Retrieving a piece of content from the server is an entity in HTTP terminology. GET requests generally do not contain the Request body, but they can also contain. Some

UISrollView, uiscrollview Scrolling up and down1. contentOffset The default value is CGPointZero, which is used to set the scrollView's scroll offset. // Sets the scrollView's scroll offset. ScrollView. contentOffset = CGPointMake (0,200 );2.

PopViewControllerAnimated, refresh the data in the UITableView on the page, poptoviewcontroller After popViewControllerAnimated,In this case, it does not execute viewDidLoad,Therefore, viewControler cannot be refreshed in time. You can call this

Xcode7, disappear pin menu (Editor-> pin), xcode7editor- If you have used autolayout, you should be familiar with pin. With this option, you can set the margins around the control: Top Space, Leading Space, Trailing Space, and Bottom Space. In the

IOS image browser controls zoom in and out, UIScrollViewThe image browser uses UIScrollView to set n ScollView UIScrollView attributes in a large ScollView. contentSize and contentoffset indicate the interactive offset of UIScrollView. The first

The use of BLOCK in iOS _ using block to implement chain Programming  I. Scenario We have an object. He has two methods: Learning study and running,This person has a quirk and must learn it after running the step. In order to realize this method and

How to Implement iOS library Animation: Part 1 (Part 1)How to Implement iOS library Animation: Part 1 Link to the original article: How to Create an iOS Book Open Animation: Part 1 Author: Vincent Ngo translated from: Development Technology

Weekly essays-15.9.21 and essay-15.9.21New knowledge point record (15.9.21) 1.WriteToFile:Atomically: -(BOOL) writeToFile :( NSString *) path atomically :( BOOL) useAuxiliaryFile; The second parameter indicates: If YES, the file write Atomicity is

Predicate NSPredicate, nspredicate Cocoa provides the NSPredicate class, which specifies the filter conditions and retains the objects that meet the conditions. The result of predicate filtering is also an array.CoreData also uses predicates to

Quartz2D, quartz1. Quartz2D Overview Quartz2D is a two-dimensional Drawing Engine that supports both Mac and iOS systems. Quartz2D can draw graphics, draw text, draw images, generate PDF, crop images, etc. You can also use custom UI controls. For

When iOS solves concurrent requests, it only accepts the results returned by the last request. Although NSOperation cancel cannot cancel the request, it can mark this NSOperation. When the cancel attribute is YES, it indicates that although

IOS-common skills, ios-skillsTip 1: When writing programs, we cannot write Fixed Screen width and height, for example, 320,480, because we need to adapt to different mobile phones. One common method is to set the width and height in the. pch file,

Ios UITableViewController (2) tableView editing mode. iostableview deletes rows. Edit mode of tableView The table view can enter the editing mode. When you enter the editing mode, you can delete, insert, and move cells. : 　　 There are two ways to

IOS coredata avoid adding duplicate data, ioscoredata First, you need to know that the item in your data is unique, and then process the unique query and insert order. During the query, the first time the array is null, the array content is 0.

IOS-resumable upload and ios-resumable upload * Mobile clients are widely used for uploading and downloading when interacting with servers. * When we download an object, we can pause the download when we click pause. When we click Download, we can

How to Write Objective-C language elegantly ?, Compile objective-c① Reduce abbreviations The abbreviation is used only for general technical terms, suchURLYou cannot create your own name abbreviations, suchCtr,Msg. The name should be longer than

Determine the iOS device modelNSString * clientModel () {NSString * model = [[UIDevice currentDevice] model]; if ([model isEqualToString: @ "iPhone1, 1"]) return @ "iPhone 1G "; if ([model isEqualToString: @ "iPhone1, 2"]) return @ "iPhone 3G"; if ([

"Get verification code" and "get verification code" When it comes to the user registration function, many apps now use mobile phone numbers as the basis for registration, which naturally cannot be separated from mobile phone verification codes. To

IOS --- implement UIViewController redirection in the Execution Code of the NSObject subclass In iOS development, to achieve jump between UIViewController, you can use the navigationController pushViewController or the UIViewController