笑笑语法(字面量)

1. NSString

NSString *string = @"I love you";

2. NSNumber

NSInteger integerNum = 10;
NSNumber *number = @(integerNum);
number = @20;

3. NSArray

NSArray *array = @[@"zhangsan", @"lisi", @"wangwu"];

4. NSMutableArray

NSMutableArray *mArray = [@[@"zhangsan", @"lisi", @"wangwu"] mutablecopy];

5. NSDictionary

NSDictionary *dic = @{@"name":@"zhangsan", @"age":@18, @"gender":@"man"};

6. NSMutableDictionary

NSMutableDictionary *mDic = [@{@"name":@"lisi", @"age":@18, @"gender":@"man"} mutableCopy];
//获取字典中的元素
NSString *name = dic[@"name"];
NSLog(@"%@", name);
NSNumber *age = mDic[@"aglanouhne"];
NSLog(@"%@", age);