在通用应用程序中实例化设备特定视图控制器的正确模式是什么？
我是Objective-C的新手所以，请耐心等待。我从Xcode4中的Universal App模板开始构建我的应用程序。有一个约定，模板开始你我试图坚持。对于每个View Controller，每个设备类型都有一个主文件和一个子类。例如：
Project/
ExampleViewController.(h|m)
- iPhone/
- ExampleViewController_iPhone.(h|m|xib)
- iPad/
- ExampleViewController_iPad.(h|m|xib)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Content *selectedContent = (Content *)[[self fetchedResultsController] objectAtIndexPath:indexPath];
ContentDetailViewController_iPhone *detailViewController = [[ContentDetailViewController_iPhone alloc] init];
detailViewController.content = selectedContent;
detailViewController.managedObjectContext = self.managedObjectContext;
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Content *selectedContent = (Content *)[[self fetchedResultsController] objectAtIndexPath:indexPath];
ContentDetailViewController_iPad *detailViewController = [[ContentDetailViewController_iPad alloc] init];
detailViewController.content = selectedContent;
detailViewController.managedObjectContext = self.managedObjectContext;
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
_iPad
iPad
iPhone
_iPhone
_iPad
没有找到相关结果
已邀请:
1 个回复
玩翁文醚碱
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { Content *selectedContent = (Content *)[[self fetchedResultsController] objectAtIndexPath:indexPath]; Class classToUse; if([self class] == [ExampleViewController_iPad class]) { // We are running on the iPad classToUse = [ContentDetailViewController_iPad class]; } else { // We must be running on either the iPhone or iPod touch classToUse = [ContentDetailViewController_iPhone class]; } // Just use superclass for typing here, since we aren't doing anything device specific ContentDetailViewController *detailViewController = [[classToUse alloc] init]; detailViewController.content = selectedContent; detailViewController.managedObjectContext = self.managedObjectContext; [self.navigationController pushViewController:detailViewController animated:YES]; [detailViewController release]; }和。由于这些在3.2之前的版本中不存在，Apple还添加了一个宏，如果版本小于3.2，将返回，如果大于或等于3.2，则从UIDevice对象获取实际值。- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { Content *selectedContent = (Content *)[[self fetchedResultsController] objectAtIndexPath:indexPath]; Class classToUse; // If you aren't supporting versions prior to 3.2, you can use [UIDevice currentDevice].userInterfaceIdiom instead to save a couple of cycles if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { // We are running on the iPad classToUse = [ContentDetailViewController_iPad class]; } else { // We must be running on either the iPhone or iPod touch classToUse = [ContentDetailViewController_iPhone class]; } // Just use superclass for typing here, since we aren't doing anything device specific ContentDetailViewController *detailViewController = [[classToUse alloc] init]; detailViewController.content = selectedContent; detailViewController.managedObjectContext = self.managedObjectContext; [self.navigationController pushViewController:detailViewController animated:YES]; [detailViewController release]; }