Programmer Group

preface Underlying structure of block under Clang analysis Clang, look at the block code int age = 30; void (^yang)(void) = ^{ NSLog(@"%d", age); }; yang(); clang // The existence of isa indicates that block is an object struct __block_impl { void *isa; int Flags; int Reserved; void *FuncPtr; }; struct __main_block_d ...

  Ladies and gentlemen, we introduced NSMutableData in the Foundation framework in the previous chapter, and NSFileManager in the Foundation framework in this chapter. NSFileManager is a file related class that provides methods related to file operation. Next, we will introduce how to use these methods to operate files. The files mentioned ...