objective-c 杂项

https://blog.csdn.net/pishum/article/details/125152886

解决苹果开发者账户 逾期问题 (xcode不允许编译)

苹果官方文档

https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html

NSLog 控制台输出

NSLog(NSString *format, …)