9.30 字典NSDictionary

不能放非OC对象，不能放nil,key不能重复（重复不会报错）

写法是：

@{@"key":@"value"};

 NSDictionary*person_dict=@{@"name":@"zhangsan",@"age":@22,@"height":@123,@"name":@"lisi"};

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

#if 0

    NSDictionary *person_dict =@{@"name":@"zhangsan",@"age":@22,@"height":@123,@"name":@"lisi"};
    
    NSLog(@"%@",person_dict[@"name"]);
    
    NSLog(@"count->%ld",person_dict.count);
    
    NSLog(@"allKeys = %@",[person_dict allKeys]);

    NSLog(@"allvalue = %@",[person_dict allValues]);

    for (NSString *key in [person_dict allKeys]) {
        
        NSLog(@"%@:%@",key,person_dict[key]);
    }
    
    [person_dict enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnullobj, BOOL * _Nonnull stop) {
        
        NSLog(@"%@:%@",key,obj);
    }];
   
//    person_dict[@"name"] = @"wangwu";
    
#endif
    
#if 0

    NSDictionary *dict =@{@"name":@"zhangsan",@"age":@123,@"height":@123.4,@"weight":@223,@"id":@"1122"};
   
    Person *person = [[Person alloc]initWithDict:dict];
    
    NSLog(@"name = %@",person.name);

    NSLog(@"weight:%f",person.weight);

//    NSLog(@"id = %@",person._id);
   
#endif
    
//#if 0 
    
    //可变字典
   NSMutableDictionary *mutiDict = @{}.mutableCopy;
    
    mutiDict = [NSMutableDictionary dictionary];

    mutiDict[@"name"] = @"zhangsan";

    mutiDict[@"age"] = @111;

    mutiDict[@"height"] = @222;

    //改名字

    NSLog(@"mutiDict = %@",mutiDict);

    mutiDict[@"name"] = @"zhangsi";

    NSLog(@"mutiDict = %@",mutiDict);

    //删除名字

    [mutiDict removeObjectForKey:@"name"];

    NSLog(@"mutiDict = %@",mutiDict);
    
    NSMutableDictionary *scoreDict = [NSMutableDictionary dictionary];
    
    NSArray *scoreItems = @[@22,@66,@33,@89.5,@99.8,@66.7];
    
    //查找需要的数据，先用枚举遍历数组scoreItems
    [scoreItems enumerateObjectsUsingBlock:^(NSNumber *score, NSUInteger idx, BOOL *_Nonnull stop) {

        //随便赋个值，用来标记这个score,方便下面查找。
        scoreDict[score] = @1;
        
    }];

    //判断是否有89.5

    if(scoreDict[@89.5]){

        NSLog(@"have");
    }else{

        NSLog(@"haven't");
    }

@end