【iOS】Class对构造简洁代码很有帮助

来源：互联网发布：网络十大热词英文编辑：程序博客网时间：2024/06/05 18:47

（这到底取的是什么标题啊）
首先先看这段代码（有删减）

@property (nonatomic, copy)NSMutableArray <NSMutableArray *>*datas;- (void)viewDidLoad {     NSMutableArray *section0 = @[                   @{@"title" : @"我的借阅",                     @"leftIcon" : @"my_borrow",                     @"vc" : @"ManageBooksViewController"}.mutableCopy,                   @{@"title" : @"我的书籍",                     @"leftIcon" : @"my_book",                     @"vc" : @"MyFileViewController"}.mutableCopy,                   ].mutableCopy                   ...    self.datas = @[section0,section1,section2, section3].mutableCopy;}#pragma mark 选择事件- (void) tableView:(UITableView *)tableViewdidSelectRowAtIndexPath:(NSIndexPath *)indexPath {    NSInteger row = indexPath.row;    NSInteger section = indexPath.section;    NSString *vcStr = self.datas[section][row][@"vc"];    if ([vcStr isEqualToString:@"MineIntroductionViewController"]) {        ActivityWebViewController *vc = [[ActivityWebViewController alloc]initWithContentUrl:@"http://librarymanager.30days-tech.com/h5/introduce.html"                                                                                       title:@"使用说明"                                                                                  presenting:NO];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                              animated:YES];    }    if ([vcStr isEqualToString:@"MyFileViewController"]) {        ManageBooksViewController *vc = [[ManageBooksViewController alloc]init];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                             animated:YES];    } else if ([vcStr isEqualToString:@"MyBooksViewController"]) {        MyFileViewController *vc = [[MyFileViewController alloc]init];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                             animated:YES];    } else if ([vcStr isEqualToString:@"MyMoreSettingViewController"]) {        MyMoreSettingViewController *vc = [[MyMoreSettingViewController alloc]init];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                             animated:YES];    }     .......}

着看之下貌似没什么问题，语法也说得过去，而且总比用indexPath来判断进入哪个控制器要简单得多，后期修改也不存在太大的问题，但随着需求的增加我们会发现每多出一个控制器，push控制器代码又会多出一段：

XXX *vc = [[XXX alloc]init];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                             animated:YES];

so，利用Class就可以瞬间把代码缩减好了。

#pragma mark 选择事件- (void) tableView:(UITableView *)tableViewdidSelectRowAtIndexPath:(NSIndexPath *)indexPath {    NSInteger row = indexPath.row;    NSInteger section = indexPath.section;    NSString *vcStr = self.datas[section][row][@"vc"];    Class vcClass = NSClassFromString(vcStr) ;    if (vcClass) {        UIViewController *vc = [[vcClass alloc]init];        vc.hidesBottomBarWhenPushed = YES;        [self.navigationController pushViewController:vc                                             animated:YES];        return ;    }}

看，很方便吧！

阅读全文

0 0