Objective-C 工厂方法

调用过程更加清晰

＋为静态方法

// 类定义
@interface People : NSObject{
    int _age;
    NSString* _name;
}
// 工厂方法  静态
+(People*)peopleWithAge:(int)age andName:(NSString*)name;

-(id)initWithAge:(int)age andName:(NSString*)name;
-(int)getAge;
-(NSString*)getName;
@end


// 类实现
@implementation People

// 工厂方法
+(People*)peopleWithAge:(int)age andName:(NSString*)name{
    return [[People alloc] initWithAge:age andName:name];
}

// 初始化方法
-(instancetype)initWithAge:(int)age andName:(NSString *)name{
    self = [super init]; // 执行父类init方法
    if (self) {
        _age = age;
        _name = name;
    }
    return self;
}

-(int)getAge{
    return _age;
}

-(NSString*)getName{
    return _name;
}
@end


// 调用
int main(int argc, char * argv[]) {
    People *p = [People peopleWithAge:10 andName:@"jinpangpang"];
    NSLog(@"p.age %d, p.name %@",[p getAge],[p getName]);
    
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
}