Question

    #import "RootViewController.h"
    #import "DetailViewController.h"

    @implementation RootViewController


    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath      *)indexPath {
    // UITableViewStyleGrouped table view style will cause the table have a textured background
    // and each section will be separated from the other ones.
    DetailViewController *controller = [[DetailViewController alloc]
                                        initWithStyle:UITableViewStyleGrouped
                                        andfileData:[dao   libraryItemAtIndex:indexPath.row]];
    controller.title = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Description"];
    [self.navigationController pushViewController:controller animated:YES];
    [controller release];
}

编译错误..导入了所有文件..出错了？

Answer 1

实际上，我猜测控制器对象（类DetailViewController）实际上并没有“dot-syntax”工作所需的属性“title”。

DetailViewController是否正确地从UIViewController继承？

Answer 2

控制器是否正确初始化？你检查它是否为空或出了什么问题？在它上面加一个断点并检查出来：

 DetailViewController *controller = [[DetailViewController alloc]

Answer 3

尝试使用：

[controller setTitle:[[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Description"];

Answer 4

尝试使用：

self->Title //... Your code here

或尝试使用这样的方法：

 -(void)setTitle: (NSString*)aTitle;
{
    [self->Title setString:aTitle];
}

要求会员'头衔'不是结构或联盟？

4 个答案: