Cách sử dụng MultipleDetailViews Và SplitviewController

[haian]

Cách sử dụng MultipleDetailViews Và SplitviewController trong Object-C như thế nào?

[AlexF]

Note that the SplitViewController will only handle two view controllers,you cannot and should not put more (or less) than two controllers into its NSArray.

http://useyourloaf.com/blog/2010/4/2...-part-iii.html


nhưng có thể dùng cách này:

/*
     File: RootViewController.h
 Abstract: A table view controller that manages two rows. Selecting a row creates a new detail view controller that is added to the split view controller.

 */

#import <UIKit/UIKit.h>


/*
 SubstitutableDetailViewController defines the protocol that detail view controllers must adopt. The protocol specifies methods to hide and show the bar button item controlling the popover.

 */
@protocol SubstitutableDetailViewController
- (void)showRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem;
- (void)invalidateRootPopoverButtonItem:(UIBarButtonItem *)barButtonItem;
@end


@interface RootViewController : UITableViewController <UISplitViewControllerDelegate> {
	
	UISplitViewController *splitViewController;
    
    UIPopoverController *popoverController;    
    UIBarButtonItem *rootPopoverButtonItem;
}

@property (nonatomic, assign) IBOutlet UISplitViewController *splitViewController;

@property (nonatomic, retain) UIPopoverController *popoverController;
@property (nonatomic, retain) UIBarButtonItem *rootPopoverButtonItem;

@end

/*
     File: RootViewController.m
 Abstract: A table view controller that manages two rows. Selecting a row creates a new detail view controller that is added to the split view controller.

 */

#import "RootViewController.h"
#import "FirstDetailViewController.h"
#import "SecondDetailViewController.h"


@implementation RootViewController

@synthesize popoverController, splitViewController, rootPopoverButtonItem;


#pragma mark -
#pragma mark View lifecycle

- (void)viewDidLoad {
    
    [super viewDidLoad];
    // Set the content size for the popover: there are just two rows in the table view, so set to rowHeight*2.
    self.contentSizeForViewInPopover = CGSizeMake(310.0, self.tableView.rowHeight*2.0);
}

-(void) viewDidUnload {
	[super viewDidUnload];
	
	self.splitViewController = nil;
	self.rootPopoverButtonItem = nil;
}

#pragma mark -
#pragma mark Rotation support

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}


- (void)splitViewController:(UISplitViewController*)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController:(UIPopoverController*)pc {
    
    // Keep references to the popover controller and the popover button, and tell the detail view controller to show the button.
    barButtonItem.title = @"Root View Controller";
    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 {
 
    // Nil out references to the popover controller and the popover button, and tell the detail view controller to hide the button.
    UIViewController <SubstitutableDetailViewController> *detailViewController = [splitViewController.viewControllers objectAtIndex:1];
    [detailViewController invalidateRootPopoverButtonItem:rootPopoverButtonItem];
    self.popoverController = nil;
    self.rootPopoverButtonItem = nil;
}


#pragma mark -
#pragma mark Table view data source

- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section {
    
    // Two sections, one for each detail view controller.
    return 2;
}


- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    static NSString *CellIdentifier = @"RootViewControllerCellIdentifier";
    
    // Dequeue or create a cell of the appropriate type.
    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    
    // Set appropriate labels for the cells.
    if (indexPath.row == 0) {
        cell.textLabel.text = @"First Detail View Controller";
    }
    else {
        cell.textLabel.text = @"Second Detail View Controller";
    }

    return cell;
}


#pragma mark -
#pragma mark Table view selection

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    
    /*
     Create and configure a new detail view controller appropriate for the selection.
     */
    NSUInteger row = indexPath.row;
    
    UIViewController <SubstitutableDetailViewController> *detailViewController = nil;

    if (row == 0) {
        FirstDetailViewController *newDetailViewController = [[FirstDetailViewController alloc] initWithNibName:@"FirstDetailView" bundle:nil];
        detailViewController = newDetailViewController;
    }

    if (row == 1) {
        SecondDetailViewController *newDetailViewController = [[SecondDetailViewController alloc] initWithNibName:@"SecondDetailView" bundle:nil];
        detailViewController = newDetailViewController;
    }

    // Update the split view controller's view controllers array.
    NSArray *viewControllers = [[NSArray alloc] initWithObjects:self.navigationController, detailViewController, nil];
    splitViewController.viewControllers = viewControllers;
    [viewControllers release];
    
    // Dismiss the popover if it's present.
    if (popoverController != nil) {
        [popoverController dismissPopoverAnimated:YES];
    }

    // Configure the new view controller's popover button (after the view has been displayed and its toolbar/navigation bar has been created).
    if (rootPopoverButtonItem != nil) {
        [detailViewController showRootPopoverButtonItem:self.rootPopoverButtonItem];
    }

    [detailViewController release];
}


#pragma mark -
#pragma mark Memory management

- (void)dealloc {
    [popoverController release];
    [rootPopoverButtonItem release];
    [super dealloc];
}

@end

và đây là cách làm: http://www.youtube.com/watch?v=cnvtb...layer_embedded


đầu tiên, quan trọng nhất là các detailview phải cùng kế thừa từ uiviewcontroller và đặt delegate là SubstitutableDetailViewController

@interface FirstDetailViewController : UIViewController <SubstitutableDetailViewController>

như các detail thông thừong thì xử lý delegate sẽ nằm ở detailview, nhưng lần này nó sẽ phải được đặt ở Rootviewcontroller

@interface RootViewController : UITableViewController <UISplitViewControllerDelegate> {

chú ý là phần được đánh dấu

#pragma mark -
#pragma mark Table view data source

là data của tableview, tức các cell của tableview

còn

#pragma mark -
#pragma mark Table view selection

là các sự kiện chọn vào cell