我拼命尝试2h现在在我的代码中找到一个错误,这是负责不显示我已经实现的SplitViewController。奇怪的是,没有显示编译错误,并且所有链接和依赖关系似乎都是正确的。SplitViewController不显示
第一次加载时屏幕上没有任何东西显示出来。但是当我旋转设备时,我看到了正确的视图。但是,即使所有视图都已连接,但在启动时根本没有视图。
我刚刚得到它的一部分工作...我发现与调试器,第一个视图控制器未启动时加载。所以视图控制器阵列的拆分视图它没有填充一个初始视图控制器...我该如何解决这个问题?
我检查的第一部分是我的AppDelegate:
#import "AppDelegate.h"
#import "RootViewController.h"
@implementation AppDelegate
@synthesize window = _window;
@synthesize splitViewController = _splitViewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
[[self window] addSubview:self.splitViewController.view];
[self.window makeKeyAndVisible];
return YES;
}
@end
的第一个视图控制器
#import "FirstViewController.h"
@implementation FirstViewController
@synthesize toolbar;
#pragma mark -
#pragma mark View Lifecycle
- (void)viewDidUnload
{
[super viewDidUnload];
self.toolbar = nil;
}
#pragma mark -
#pragma mark Managing the Popover
- (void)showRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem
{
NSMutableArray *itemsArray = [toolbar.items mutableCopy];
[itemsArray insertObject:barButtonItem atIndex:0];
[toolbar setItems:itemsArray animated:NO];
}
- (void)invalidateRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem
{
NSMutableArray *itemsArray = [toolbar.items mutableCopy];
[itemsArray removeObject:barButtonItem];
[toolbar setItems:itemsArray animated:NO];
}
#pragma mark -
#pragma mark Rotation support
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
@end
我检查的第二部分是我的RootViewController的。事情是,当你点击一个tableView Entry时,一个新的视图控制器应该被加载并显示出来。所以我没有在我的应用程序委托中实例化VC,而是在“did select row”表中查看委托方法。
这是RootViewController的:
#import "RootViewController.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
@implementation RootViewController
@synthesize popoverController, splitViewController, rootPopoverButtonItem;
#pragma mark -
#pragma mark View Lifecycle
- (void)viewDidLoad
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
[super viewDidLoad];
self.contentSizeForViewInPopover = CGSizeMake(310.0, self.tableView.rowHeight * 2.0);
}
- (void)viewDidUnload
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
[super viewDidUnload];
self.splitViewController = nil;
self.rootPopoverButtonItem = nil;
}
#pragma mark -
#pragma mark Rotation support
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
return YES;
}
#pragma mark -
#pragma mark SplitViewController delegates
- (void)splitViewController:(UISplitViewController *)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)pc
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
barButtonItem.title = @"PolyCube Prototypes";
self.popoverController = pc;
self.rootPopoverButtonItem = barButtonItem;
UIViewController <SubstitutableDetailViewController> *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
[detailViewController showRootPopoverButtonItem:rootPopoverButtonItem];
}
- (void)splitViewController:(UISplitViewController *)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
self.popoverController = nil;
self.rootPopoverButtonItem = nil;
UIViewController <SubstitutableDetailViewController> *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
[detailViewController invalidateRootPopoverButtonItem:rootPopoverButtonItem];
}
#pragma mark -
#pragma mark Table View Data Source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
return 2;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
static NSString *CellIdentifier = @"RootViewControllerIdentifier";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if (indexPath.row == 0) {
cell.textLabel.text = @"PolyCube 1";
}
else {
cell.textLabel.text = @"PolyCube 2";
}
return cell;
}
#pragma mark -
#pragma mark - Table View Selection
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"%s %d", __PRETTY_FUNCTION__, __LINE__);
NSUInteger row = indexPath.row;
UIViewController <SubstitutableDetailViewController> *detailViewController = nil;
if (row == 0) {
FirstViewController *newDetailViewController = [[FirstViewController alloc] initWithNibName:@"FirstDetailView" bundle:nil];
detailViewController = newDetailViewController;
}
if (row == 1) {
SecondViewController *newDetailViewController = [[SecondViewController alloc] initWithNibName:@"SecondDetailView" bundle:nil];
detailViewController = newDetailViewController;
}
NSArray *vcs = [[NSArray alloc] initWithObjects:self.navigationController, detailViewController, nil];
splitViewController.viewControllers = vcs;
if (popoverController != nil) {
[popoverController dismissPopoverAnimated:YES];
}
if (rootPopoverButtonItem != nil) {
[detailViewController showRootPopoverButtonItem:self.rootPopoverButtonItem];
}
}
@end
我真的很感激了援助之手......我不知道去哪里找了。我甚至检查了所有的IB连接......我认为没有错。但仍然只是一个白色的屏幕。
谢谢你这么多 塞巴斯蒂安
要在任何地方加载NIB文件吗? – craig1231 2012-01-01 21:06:42
以及我认为是这样的......我刚刚发现,splitviewcontroller.viewcontrollers数组最初没有填充时加载....我该如何解决? 正如你所看到的,当我点击一个tableview条目时,我更新了这个数组。但我记录数组,同时调试显示在NSLog中的对象....并有消息:NULL 所以我认为应该有一种可能性,以“navcontroller和firstviewcontroller”初始化该数组... ...但我不知道如何实际 – konturgestaltung 2012-01-01 21:11:54