Objective C 强调财产与自我

Objective-C是一种面向对象的编程语言，最初由苹果公司开发并用于iOS和macOS平台的应用程序开发。Objective-C强调财产与自我，这意味着它允许开发者通过使用属性和方法来管理对象的状态和行为。在本文中，我们将探讨Objective-C中财产与自我的重要性，并通过案例代码来说明其用法。

objective-c
@interface Person : NSObject
@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) NSInteger age;
@end
@implementation Person
@end
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *person = [[Person alloc] init];
        person.name = @"John";
        person.age = 25;
        
        NSLog(@"Name: %@, Age: %ld", person.name, person.age);
    }
    return 0;
}

objective-c
@interface Calculator : NSObject
- (NSInteger)add:(NSInteger)a to:(NSInteger)b;
- (NSInteger)subtract:(NSInteger)a from:(NSInteger)b;
@end
@implementation Calculator
- (NSInteger)add:(NSInteger)a to:(NSInteger)b {
    return a + b;
}
- (NSInteger)subtract:(NSInteger)a from:(NSInteger)b {
    return b - a;
}
@end
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Calculator *calculator = [[Calculator alloc] init];
        
        NSInteger sum = [calculator add:5 to:10];
        NSInteger difference = [calculator subtract:3 from:8];
        
        NSLog(@"Sum: %ld", sum);
        NSLog(@"Difference: %ld", difference);
    }
    return 0;
}