Objective-C 字典、可變字典

標籤：

字典相當於c++ stl中的map

字典NSDictionary

 1 #import <UIKit/UIKit.h> 2 #import "AppDelegate.h" 3  4 int main(int argc, char * argv[]) { 5     // 從@符號建立字典  實際上就是索引值對容器 6     NSDictionary *dict = @{@"name":@"zhangsan",@"sex":@"male"}; 7     NSLog(@"%@",dict); 8      9     // 根據鍵擷取值10     NSLog(@"%@",[dict objectForKey:@"name"]);11     12     // 從設定檔中讀取13     NSDictionary *dict1 = [NSDictionary dictionaryWithContentsOfFile:14         [[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist" ]];15     NSLog(@"%@",[dict1 objectForKey:@"name"]);16     NSLog(@"%@",[dict1 objectForKey:@"age"]);17     18         @autoreleasepool {19         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));20     }21 }

 

可變字典 NSMutableDictionary

1     NSMutableDictionary *dict2 = [[NSMutableDictionary alloc]init];2     // setObject 可以新增key 也可以修改已有key的值3     [dict2 setObject:@"jinpangpang" forKey:@"name"];4     [dict2 setObject:@"113" forKey:@"name"];5     NSLog(@"%@",[dict2 objectForKey:@"name"]);

 

Objective-C 字典、可變字典