我创建了一个标签栏应用程序,删除了默认的 FirstView 和 SecondView 并添加了以下两个 ViewController:
- JustAnotherView(它只是一个 UIViewController,里面有一个 UIView)
- MyListOfItems(这是一个 UIViewController,里面有一个 TableView)
我有一个名为 ListOfItemsDetailViewController 的第三个 ViewController,里面有一个 UIView,当用户触摸其中一个 TableView 单元格时应该调用它。
应用程序编译没有问题。我可以同时触摸选项卡栏按钮并出现正确的视图。
问题:当我单击 TableView 单元格时,执行切换到详细信息视图的代码(没有崩溃或错误),但视图从未显示。
这是应用程序和带有 NSLog 的调试器的屏幕截图,显示它通过 pushViewController 而没有崩溃:
http://clip2net.com/clip/m52549/thumb640/1281588813-9c0ba-161kb.jpg
这是代码。
MyListOfItemsViewController.h
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import "ListOfItemsDetailViewController.h";
@interface MyListOfItemsViewController : UIViewController {
ListOfItemsDetailViewController *listOfItemsDetailViewController;
}
@property (nonatomic, retain) ListOfItemsDetailViewController *listOfItemsDetailViewController;
@end
这是 MyListOfItemsViewController.m 文件:
#import "MyListOfItemsViewController.h"
@implementation MyListOfItemsViewController
@synthesize listOfItemsDetailViewController;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
self.title = @"My List Of Items";
NSLog(@"My List Of Items Did Load");
}
#pragma mark -
#pragma mark Table view data source
// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 5;
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
NSString *cellMessage;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cellMessage = [NSString stringWithFormat:@"indexPath: %d",indexPath.row];
cell.textLabel.text = cellMessage;
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
ListOfItemsDetailViewController *vcListOfItemsDetail = [[ListOfItemsDetailViewController alloc]
initWithNibName:@"ListOfItemsDetail" bundle:[NSBundle mainBundle]];
self.listOfItemsDetailViewController = vcListOfItemsDetail;
[vcListOfItemsDetail release];
[self.navigationController pushViewController:self.listOfItemsDetailViewController animated:YES];
NSLog(@"Did Execute didSelectRowAtIndexPath WITHOUT Crashing or Error.");
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
NSLog(@"My List Of Items View Did Unload");
}
- (void)dealloc {
[super dealloc];
}
@end
请帮忙。将不胜感激!!!
我一直在让自己发疯,试图在 iOS 平台上获得基本的导航。
另外,请原谅外行的问题,我知道你们中的大多数人已经知道如何做到这一点。
提前致谢。约森