AI (4)
Algorithms (1)
Android (9)
Arch Linux (4)
Back-end (2)
BadUSB (2)
C/C++ (24)
CSS (6)
ChatGPT (3)
Cheatsheet (51)
Culture (5)
Cyberpunk 2077 (1)
Dart (5)
Data Protection (1)
Database (2)
Django (3)
Docker (1)
FOSS (1)
Feelings (5)
Flatpak (4)
Flipper Zero (1)
Front-end (1)
Gaming (2)
Git (8)
Gunicorn (1)
HTML (13)
Haskell (9)
Java (4)
JavaScript (5)
Jekyll (3)
Kotlin (2)
Lisp (8)
Mark-up (3)
Nginx (1)
Nintendo Switch (2)
PHP (33)
Perl (2)
Project Management (4)
Python (19)
RegEx (3)
Ruby (8)
Sadness (38)
Stable Diffusion (1)
Tkinter (1)
UNIX/Linux (81)
Ubuntu Linux (11)
Version Control (2)
Windows (3)
iOS (181)
macOS (36)
李二狗 — @Meniny
Published 12:10 Oct 14, 2015.
Created by @ezra. Categorized in #Programming, and tagged as #iOS.
Source format: Markdown
最近遇到和看到的一些面试题。
+(void)load;、+(void)initialize; 有什么用处?在Objective-C中,runtime会自动调用每个类的两个方法。+load会在类初始加载时调用,+initialize会在第一次调用类的类方法或实例方法之前被调用。这两个方法是可选的,且只有在实现了它们时才会被调用。
共同点: 两个方法都只会被调用一次。
View More
