IOS

[Swift learning] Swift programming tour-optional chain (21), swift tour Optional chain Optional Chaining is a type where the current value may benilTo request and call properties, methods, and methods of the following standard. If the optional value

Summary of array deduplication methods and summary of array deduplication Methods I have been sorting out the interview questions over the past few days. By the way, I would like to sum up what I learned in the past. The array should be

The first Developer Preview version of Swift 3.0 will be released in November May 12, swift3.0 The Swift team announced in their blog that the first Developer Preview version of Swift 3.0 will be released on July 6, May 12. The official version

IOS learning, ios Learning Preparations --- Original article from First, apply for AppID on the open platform (I applied for it on the first night and passed it at noon the next day), and then import the SDK, that is, three. h and. file a. For

In IOS, the app implements the jiugongge feature, and in IOS, the app implements the jiugongge feature. The idea of implementing the jiugongge algorithm is as follows:   Example: 1 // 2 // ViewController. m 3 // jiugongge 4 // 5 // Created by Li

[Code Note] determines whether there is space in textField. Note textfield I ,. 2. Engineering Drawing. 3. Code. ViewController. m -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a

Use collectionview to implement waterfall stream-transfer and collectionview waterfall General idea of Algorithms   Let's talk about the general idea. Since the image size and position are different, we naturally think of the need to calculate the

App Thinning, appthinning App Thinning Because Bitcode compilation must be enabled in the project, Bitcode has some misunderstandings before, so I have sorted out the relevant knowledge for reference only. If there is any error, please

Knowledge points of internal and external interface dependency and UIScrollView, and uiscrollview 1: Class Extension can also skillfully solve an interface exposure problem. Some attributes or methods can be provided externally, and some can be

Copy the UC browser image loading progress bar and copy the uc browser progress bar A few days ago, I used the UC browser to watch the news (accidentally advertised to UC) and saw its picture loading progress bar. I wrote one by myself just recently.

IOS advanced learning-network data parsing and ios advanced data parsing I. Basic concepts of analysis "Resolution": extract data in the specified format. Prerequisites for parsing: The format is agreed in advance. The data provider provides data

Common Error Analysis in xCodeThe program reports the following error: @ synthesize of 'weak' property is only allowed in ARC or GC mode. The current project is manual memory management. Therefore, when a third-party resource library is introduced,

[IOS/translation] Core Services Layer This core service layer includes basic system services of applications. The key services are between core functions and core function libraries. All applications must use these basic types. This layer also

IOS encapsulated SDK The main purpose of this tutorial is to explain how to create and use an SDK in your iOS project, also known as the. a file. Therefore, unlike the tutorials on other websites, we only talk about a few things (that is, what we

[Code Note] UIScrollerView contains two tableviews, which are created in pure code. I ,.     2. Engineering Drawing. 3. Code. RootViewController. h #import @interface RootViewController : UIViewController{ UIScrollView *_scrolView;

[Objective-C] 07-custom constructor and description method, objective-c07- In lecture 5th, we have introduced how to define classes and create and initialize objects, such as Student class.1. Student. hCopy code 2. Student. mCopy code 3. Create a

MJRefresh pull-down refresh framework and mjrefresh pull-down framework Github: https://github.com/CoderMJLee/MJRefresh   MJRefresh Class Structure Self. userTableView. mj_footer = [MJRefreshAutoNormalFooter footerWithRefreshingBlock: ^

Summary of OC interview questions for iOS development 1. Briefly describe the memory management mechanism in OC The memory management mechanism of OC is automatic reference technology. The principle of memory management is who opens up who releases

UITextField Function Based on UITextView (with placeholder function) Preface First of all, while customizing UITextView, we need to figure out the difference between UITextField and UITextView, which are the functions of UITextView, but UITextField

SpriteKit Game Development Challenge 2: another solution to the zombie problem This challenge aims to set botnets to invincible when they encounter an enemy. The specific requirements are as follows: 1 You shoshould create a variable property