IOS字典NSDictionary与NSMutableDictionary知识点

//创建词典
    NSDictionary *dictionary=[NSDictionary dictionaryWithObjectsAndKeys:@"wujy",@"name",@29,@"age",nil];
    NSInteger Count=[dictionary count];
    NSLog(@"词典的个数为%ld",Count);
    
    //得到词典中的所有key
    NSEnumerator *enumeratorkey=[dictionary keyEnumerator];
    for (NSObject *obj in enumeratorkey) {
        NSLog(@"key为：%@",obj);
        NSLog(@"通过key找到value值为：%@",[dictionary objectForKey:obj]);
    }
    
    //得到词典中的所有value值
    NSEnumerator *enumeratorvalue=[dictionary objectEnumerator];
    for (NSObject *obj in enumeratorvalue) {
        NSLog(@"value为：%@",obj);
    }
    
    //简便的方式创建 key排前面value排后面
    NSDictionary *newDictionary=@{@"name":@"wujy",@"age":@29};
    NSArray *keyArray=[newDictionary allKeys];
    for (NSObject *obj in keyArray) {
        NSLog(@"key的值为：%@",obj);
    }
    
    NSArray *valueArray=[newDictionary allValues];
    for (NSObject *obj in valueArray) {
        NSLog(@"value的值为：%@",obj);
    }
    
    //blocks插件
    NSDictionary *blockDictionary=[NSDictionary dictionaryWithObjects:[[NSArray alloc] initWithObjects:@3,@15,@29,nil] forKeys:[[NSArray alloc] initWithObjects:@"IOS",@"work",@"age",nil]];
    //遍历
    [blockDictionary bk_each:^(id key, id obj) {
        NSLog(@"使用blocks的key为:%@",key);
        NSLog(@"对应的value为:%@",obj);
    }];
    
    //过滤 返回符合条件的词典
    NSDictionary *matchDictionary=[blockDictionary bk_match:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]<10?YES:NO;
        return select;
    }];
    NSLog(@"match符合的项为：%@",matchDictionary);
    
    //过滤
    NSDictionary *selectDictionary=[blockDictionary bk_select:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>10?YES:NO;
        return select;
    }];
    NSLog(@"select符合的项为%@",selectDictionary);
    
    //反向过滤
    NSDictionary *rejectDictionary=[blockDictionary bk_reject:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>10?YES:NO;
        return select;
    }];
    NSLog(@"reject符合的项为%@",rejectDictionary);
    
    //对各个项进行修改
    NSDictionary *mapDictinary=[blockDictionary bk_map:^id(id key, id obj) {
        return [NSNumber numberWithInt:[obj intValue]+1];
    }];
    NSLog(@"map修改后的项为%@",mapDictinary);
    
    //是否符合条件 返回bool
    BOOL isSelected=[blockDictionary bk_any:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>20?YES:NO;
        return select;
    }];
    NSLog(@"%d符合条件",isSelected);
    
    //判断是否所有的项都符合这个条件
    BOOL allSelected=[blockDictionary bk_all:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>20?YES:NO;
        return select;
    }];
    NSLog(@"%d符合条件",allSelected);
    
    //判断是否所有的项都不符合这个条件
    BOOL noneSelected=[blockDictionary bk_none:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>50?YES:NO;
        return select;
    }];
    NSLog(@"%d符合条件",noneSelected);

    //创建一个nsmutabledictionary
    NSMutableDictionary *mutableDictionary=[NSMutableDictionary dictionaryWithCapacity:3];
    [mutableDictionary setObject:@"wujy" forKey:@"name"];
    [mutableDictionary setObject:@"cnblogs.com/wujy" forKey:@"webName"];
    [mutableDictionary setObject:@29 forKey:@"age"];
    
    //得到词典中的所有key
    NSEnumerator *enumeratorkey=[mutableDictionary keyEnumerator];
    for (NSObject *obj in enumeratorkey) {
        NSLog(@"key为：%@",obj);
        NSLog(@"通过key找到value值为：%@",[mutableDictionary objectForKey:obj]);
    }
    
    //删除其中一个key
    [mutableDictionary removeObjectForKey:@"name"];
    NSLog(@"删除name的key以后值：%@",mutableDictionary);
    
    [mutableDictionary removeAllObjects];
    NSLog(@"删除所有以后，可变词典个数为%ld",[mutableDictionary count]);
    
    //blocks
    //过滤
    NSMutableDictionary *newmutableDictionary=[NSMutableDictionary dictionaryWithDictionary:@{@"IOS":@3,@"work":@13,@"age":@29}];
    [newmutableDictionary bk_performSelect:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>10?YES:NO;
        return select;
    }];
    NSLog(@"过滤后的可变词典为(29,13)%@",newmutableDictionary);
    
    //取反过滤
    [newmutableDictionary bk_performReject:^BOOL(id key, id obj) {
        BOOL select=[obj intValue]>20?YES:NO;
        return select;
    }];
    NSLog(@"取反过滤的可变词典为(13)%@",newmutableDictionary);
    
    //修改各个项的结果
    [newmutableDictionary bk_performMap:^id(id key, id obj) {
        return @([obj intValue]+1);
    }];
    NSLog(@"修改后的可变词典为(14)%@",newmutableDictionary);