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Objective-c - Why are parent class initializers called different in swift initialization and object-c initialization?

In swift, we must confirm that the subclass has completed initialization before calling the parent class initializer, as follows: {Code...} But in Object-c, we must first confirm that the parent class has completed initialization before proceeding. Subclass initialization: {code...} Is this the reas...

習(xí)慣沉默 2017-05-02 09:26:32 0  0  867

Class initialization problem

Initialization of a class means that a class file of the class is generated, right?

P粉477414213 2022-11-19 12:50:45 0  0  875

Where are the global initialization variables of an application similar to ASP generally set?

May I ask where the global initialization variables of an application similar to ASP are generally set? If so, and what are the references? Thank you.

stock2 2019-04-27 20:06:27 0  1  1075

Pointer - How to pass array in C++ initialization list?

As shown in the title, in the code below, X and Y can be constructed normally, but A and B report an error [Error] incompatible types in assignment of 'const int' to 'int []' . Please tell me how to pass the array in the initialization list in the above situation. Thus, {code...} can be implemented ...

巴扎黑 2017-05-16 13:25:27 0  2  858

java - How to execute the project's initialization program when tomcat starts

When tomcat starts, the console outputs a lot of information. The information shows that when tomcat starts, many project configuration files are loaded and the project initialization method is called, but I don't know how it is called. Where was it called? There is something that needs to be config...

我想大聲告訴你 2017-07-05 10:02:11 0  4  1212

objective-c - OC It is better not to use properties in initialization methods or dealloc, why?

I have seen this description several times: It is best not to use attributes in the initialization method or dealloc, because you cannot be sure whether self is actually calling the instance you want. Why is this?

習(xí)慣沉默 2017-05-02 09:29:36 0  3  868

angular.js - How to assign $http to the initial value of factory during angular initialization

Because I think the factory is a singleton, I use the http result as the return value of the factory. How can I assign an initial value to the factory with $http during Angular initialization? angular.module('some',[]) .factory('factory',function($http){ var some = {}; $http.get('url'...

phpcn_u1582 2017-05-15 16:54:00 0  4  871

visual-studio - Regarding the temporary variable destruction problem generated during initialization of c++ object array?

The first case: When creating a C++ object array, if you assign values ??through the initialization list, temporary variables will be generated, but why the destructor will not be called. The code is as follows: {code...} The output result is: Among them, Point A[2] ={Point(1,2),Point()}; Initialize...

PHP中文網(wǎng) 2017-05-16 13:24:00 0  3  1180

ios - Why do some books say that the initialization method and dealloc method should always read and write data through instance variables?

Effective objecttive -c2.0 This book says that in the initialization method and dealloc method, you should always read and write data through instance variables. After reading it for a long time, I didn’t understand the reason? Has anyone read this book?

我想大聲告訴你 2017-05-17 10:05:31 0  1  1137

echart initialization overflow container - echart initialization overflow container

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technical exchange platform for programming enthusiasts, learn, communicate and grow with developers, and create an era for developers!

淡淡煙草味 2017-07-05 10:43:34 0  1  918

MySQL initialization error, solution

207 張暢 2021-04-27 09:31:07 0  1  1033

CommandText property initialization problem

I'm trying to materialize data into 2 (later 3) tables simultaneously using a C# console application. I want to implement first name, last name and user ID in table "Users", the user ID will be automatically incremented. The same userID should also be implemented into table "profile&q...

P粉668804228 2024-04-04 22:43:24 0  1  1795

javascript - Please help, angularjs. I can request json data but it reports a cross-domain problem. I can open the json link given to me by the backend. Here is my request file.

// angularjs initialization ng-app="myApp" {code...}

伊謝爾倫 2017-05-16 12:59:40 0  5  351

github - .gitmodules file initialization problem

*This repo is a blog created by github + hexo. The submodule themes/landscape-plus was not properly initialized with a .gitmodules file. Where did this problem come from and how to solve it?

PHPz 2017-05-02 09:41:28 0  1  737

jvm - Are Java new objects atomic?

{Code...} I would like to ask, there is complex object initialization logic in the xxx() method. Is the object created by the new keyword atomic? If not, will there be a problem of object initialization disorder?

滿天的星座 2017-06-23 09:14:17 0  4  1408

javascript - vue initialization data assignment error

vue code {code...} reports an error TypeError: Cannot set property 'titleList' of undefined. Type error. Undefined properties cannot be set. The data response.data is an object array. I have initialized titleList, but for some reason it says it is undefined. Ask God for answers

漂亮男人 2017-06-26 10:55:47 0  6  875

javascript - JS JQ data initialization problem

How can I make the temperature data of the upper yellow area and the lower white area the same after the page is loaded? The yellow part is written in the tag using HTML, and the white part is controlled using JS. It can be increased or decreased, but the data can be kept consistent after increasing...

過去多啦不再A夢 2017-07-05 10:49:08 0  2  906

javascript - js function code, about scrolling loading data

Can you explain in detail what this code means? scroll initialization is true

伊謝爾倫 2017-07-05 10:45:13 0  3  854

javascript - Problems with bootstarp-fileinput initialization preview

I want to directly display the existing image when initializing fileinput. This image is accessed from ajax and is an array. {Code...} The following is the prototype: {Code...} The following is the json data {Code...} initialPreview can obviously receive arrays directly, and my json data above...

代言 2017-06-26 10:56:57 0  1  893

angular.js - $watch calls function on first initialization

$scope.paginationConf = { {code...}

漂亮男人 2017-05-15 17:01:32 0  1  544