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// // main.m // NSMutableDictionary // #import <Foundation/Foundation.h> #import "Pepole.h" //引入外部文件的方法：右键项目－》Add files to ...－》选择文件并选择copy文件 //引入如果出现编译问题(link error),1.Product->clean;2.左击项目－》build phases->compaile sources->添加刚加入的m文件 void mdict(){ //创建一个空字典 NSMutableDictionary *dict = [NSMutableDictionary dictionary]; //向字典中添加元素 Pepole *p1 =[Pepole pepoleWithName:@"p1"]; [dict setObject:p1 forKey:@"key1"]; [dict removeObjectForKey:@"key1"];//删除指定的字典元素 [dict removeAllObjects];//删除所有的字典元素 [dict addEntriesFromDictionary:[NSDictionary dictionaryWithObject:p1 forKey:@"p2"]];//把字典添加到字典中 NSLog(@"dict is %@", dict); } int main(int argc, const char * argv[]) { @autoreleasepool { mdict(); } return 0; } |