这是在一个类中存储数据
UIPasteboard *pasteboard4 = [UIPasteboard pasteboardWithName:@"Pasteboard4" create:YES];

    
    NSDictionary *loginDic = [NSDictionary dictionaryWithObject:@"用户名密码登陆" forKey:@"getKSWay"];
    NSData *loginDictData = [NSKeyedArchiver archivedDataWithRootObject:loginDic];
    [pasteboard4 setData:loginDictData forPasteboardType:@"getKSWay"];
    

然后在另一个类中读取
UIPasteboard *pb = [UIPasteboard pasteboardWithName:@"Pasteboard4" create:NO];

        NSDictionary *dict = [NSKeyedUnarchiver unarchiveObjectWithData:[pb dataForPasteboardType:@"getKSWay"]];
        
        NSLog(@"登陆方式：%@",[dict objectForKey:@"getKSWay"]);
        输出是null