第一题
Person *person = [[Person alloc]init];
person.age = 20;
void(^block)(void) = ^(){
NSLog(@"%li",person.age);
};
person.age = 40;
block();
第二题
Person *person = [[Person alloc]init];
person.age = 20;
void(^block)(void) = ^(){
NSLog(@"%li",person.age);
};
person = [[Person alloc]init];
person.age = 40;
block();
第三题
Person *person = [[Person alloc]init];
person.age = 20;
__weak Person *weakPerson = person;
void(^block)(void) = ^(){
NSLog(@"%li",weakPerson.age);
};
person = [[Person alloc]init];
person.age = 40;
block();
第四题
__weak Person *person = [[Person alloc]init];
person.age = 20;
void(^block)(void) = ^(){
NSLog(@"%li",person.age);
};
person.age = 40;
block();
第五题
Person *person = [[Person alloc]init];
person.age = 20;
void(^block)(void) = ^(){
person = [[Person alloc]init];
person.age = 40;
NSLog(@"%li",person.age);
};
block();
第六题
__block Person *person = [[Person alloc]init];
person.age = 20;
void(^block)(void) = ^(){
NSLog(@"%li",person.age);
};
person = [[Person alloc]init];
person.age = 40;
block();
第七题
__block Person *person = [[Person alloc]init];
person.age = 20;
__weak Person *weakPerson = person;
void(^block)(void) = ^(){
NSLog(@"%li",weakPerson.age);
};
person = [[Person alloc]init];
person.age = 40;
block();