如何同时解析两个不同的.xml文件？

Question

我正在使用一个标签栏应用程序，并且有4个不同的表格视图。有四个标签栏项目，每个都有不同的表格视图。我应该填充数组表格.xml文件。然而，问题是这样的：

我一次只能解析一个XML文件。如何通过NSXMLParser同时解析两个或更多.xml文件？

或者我应该合并xml files? Yet, if I merge, I have to create two or more NSMutableArray的把它们放到另一个tableview视图。任何建议？

你们有什么建议？我不知道如何合并这些xml文件，但即使我这样做，我也应该创建NSMutableArray s来使用它们为每个视图填充数组。

在此先感谢。

编辑：

这是我AppDelegate.m

@synthesize window = _window; 
@synthesize tabBarController = _tabBarController; 


- (void)applicationDidFinishLaunching:(UIApplication *)application { 

//Initialize the delegate. 
XMLParser *parser = [[XMLParser alloc] initXMLParser]; 

// Configure and show the window 
self.window.rootViewController = self.tabBarController; 
[self.window makeKeyAndVisible]; 
[window makeKeyAndVisible]; 
} 


- (void)applicationWillTerminate:(UIApplication *)application { 
// Save data if appropriate 
} 


- (void)dealloc { 
[tabBarController release]; 
[window release]; 
[super dealloc]; 
} 

@end 

这是我XMLparser.m：

#import "XMLParser.h" 
#import "XMLAppDelegate.h" 
#import "Duyuru.h" 
#import "Beste.h" 
#import "BesteViewController.h" 
#import "DuyuruViewController.h" 

@implementation XMLParser 

- (XMLParser *) initXMLParser { 

[super init]; 

appDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate]; 

return self; 
} 

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName 
attributes:(NSDictionary *)attributeDict { 


if (parser == bestevc.parser) { 

    if([elementName isEqualToString:@"Besteler"]) { 
    //Initialize the array. 
    bestevc.besteler = [[NSMutableArray alloc] init]; 
    } 

    else if([elementName isEqualToString:@"Beste"]) { 

     //Initialize the book. 
     aBeste = [[Beste alloc] init]; 

     //Extract the attribute here. 
     aBeste.besteID = [[attributeDict objectForKey:@"id"] integerValue]; 

     NSLog(@"Reading id value :%i", aBeste.besteID); 
    } 

} 

if (parser == duyuruvc.parser ) { 

    if([elementName isEqualToString:@"Duyurular"]) { 
     //Initialize the array. 
     duyuruvc.duyurular = [[NSMutableArray alloc] init]; 
    } 

    else if([elementName isEqualToString:@"Duyuru"]) { 

     //Initialize the book. 
     aDuyuru = [[Duyuru alloc] init]; 

     //Extract the attribute here. 
     aDuyuru.duyuruID = [[attributeDict objectForKey:@"id"] integerValue]; 

     NSLog(@"Reading id value :%i", aDuyuru.duyuruID); 
    } 

    } 

} 

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 

if (parser == bestevc.parser ) { 
    if(!currentElementValue1) 
     currentElementValue1 = [[NSMutableString alloc] initWithString:string]; 
    else 
     [currentElementValue1 appendString:string]; 

    NSLog(@"Processing Value: %@", currentElementValue1); 
} 

if (parser == duyuruvc.parser ) { 
    if(!currentElementValue2) 
     currentElementValue2 = [[NSMutableString alloc] initWithString:string]; 
    else 
     [currentElementValue2 appendString:string]; 

    NSLog(@"Processing Value: %@", currentElementValue2); 
} 
} 

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName 
    namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { 

    if (parser == bestevc.parser) { 

    if([elementName isEqualToString:@"Besteler"]) 
    return; 
    //There is nothing to do if we encounter the Books element here. 

    // and release the object. 
    if([elementName isEqualToString:@"Beste"]) { 
     [bestevc.besteler addObject:aBeste]; 

     [aBeste release]; 
     aBeste = nil; 
    } 
    else 
     [aDuyuru setValue:currentElementValue1 forKey:elementName]; 

    [currentElementValue1 release]; 
    currentElementValue1 = nil; 
} 
if (parser == duyuruvc.parser) { 

    if([elementName isEqualToString:@"Duyurular"]) 
     return; 
    //There is nothing to do if we encounter the Books element here. 

    // and release the object. 
    if([elementName isEqualToString:@"Duyuru"]) { 
     [duyuruvc.duyurular addObject:aDuyuru]; 

     [aDuyuru release]; 
     aDuyuru = nil; 
    } 
    else 
     [aDuyuru setValue:currentElementValue2 forKey:elementName]; 

    [currentElementValue2 release]; 
    currentElementValue2 = nil; 
} 

} 


- (void) dealloc { 
[aDuyuru release]; 
[aBeste release]; 
[currentElementValue1 release]; 
[currentElementValue2 release]; 
[super dealloc]; 
} 

@end 

这是我BesteViewController.m：

#import "BesteViewController.h" 
#import "XMLAppDelegate.h" 
#import "Beste.h" 
#import "XMLParser.h" 

@implementation BesteViewController 
@synthesize parser, besteler; 


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
return 1; 
} 


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) 
section { 
    return [besteler count]; 
} 


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath 
(NSIndexPath *)indexPath { 

static NSString *CellIdentifier = @"Cell"; 

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
if (cell == nil) { 
    cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero 
    reuseIdentifier:CellIdentifier] autorelease]; 
} 

Beste *aBeste = [besteler objectAtIndex:indexPath.row]; 

[[cell textLabel] setText:aBeste.name]; 
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 

// Set up the cell 
return cell; 
} 

- (void)viewDidLoad { 
[super viewDidLoad]; 
// Uncomment the following line to add the Edit button to the navigation bar. 
// self.navigationItem.rightBarButtonItem = self.editButtonItem; 

appDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate]; 

NSURL *url = [[NSURL alloc] 
     initWithString:@"https://sites.google.com/site/bfbremoteser 
    ver/iphoneapp/besteler.xml"]; 
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url]; 


//Initialize the delegate. 
XMLParser *parser = [[XMLParser alloc] initXMLParser]; 


//Set delegate 
[xmlParser setDelegate:parser]; 


//Start parsing the XML file. 
BOOL success = [xmlParser parse]; 

if(success) 
    NSLog(@"No Errors"); 
else 
    NSLog(@"Error Error Error!!!"); 

self.navigationItem.title = @"Besteler"; 
} 







/* 
// Override to support rearranging the list 
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath 

*)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { 
} 
*/ 


/* 
// Override to support conditional rearranging of the list 
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath*) 
indexPath { 
// Return NO if you do not want the item to be re-orderable. 
return YES; 
} 
*/ 

/* 
- (void)viewWillAppear:(BOOL)animated { 
[super viewWillAppear:animated]; 
} 
*/ 
/* 
- (void)viewDidAppear:(BOOL)animated { 
[super viewDidAppear:animated]; 
} 
    */ 
/* 
- (void)viewWillDisappear:(BOOL)animated { 
} 
*/ 
/* 
- (void)viewDidDisappear:(BOOL)animated { 
} 
*/ 




- (void)didReceiveMemoryWarning { 
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview 
// Release anything that's not essential, such as cached data 
} 


- (void)dealloc { 
[besteler release]; 
[appDelegate release]; 
[super dealloc]; 
} 


@end 

Answer 1

我不确定我是否正确理解您的问题，因此请尝试提供更多详细信息，并根据需要编辑我的答案。

对于要解析的每个xml文件，您应该有一个单独的NSXMLParser实例。在你的情况下，你的标签栏上的每个视图控制器中可能应该有一个NSXMLParser实例。

即使使用相同的NSXMLParserDelegate，也可以全部启动它们，因为所有委托方法都会告诉您哪个NSXMLParser实例调用它们。

编辑：

您应该将此代码移动到视图控制器的标签栏控制器上：

NSURL *url = [[NSURL alloc] initWithString:@"..."]; 
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url]; 


//Initialize the delegate. 
XMLParser *parser = [[XMLParser alloc] initXMLParser]; 

//Set delegate 
[xmlParser setDelegate:parser]; 


//Start parsing the XML file. 
BOOL success = [xmlParser parse]; 

if(success) 
    NSLog(@"No Errors"); 
else 
    NSLog(@"Error Error Error!!!"); 

除了这条线（保持它在的appdelegate并通过对它的引用到所有视图这需要分析你的东西标签栏控制器控制器）：

XMLParser *parser = [[XMLParser alloc] initXMLParser]; 

然后设置一个解析器（的的NSXMLParser实例）为您的视图控制器上的属性s和内部xmlParse检查称为委托的解析器，并据此采取行动。例如：

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
    namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName 
    attributes:(NSDictionary *)attributeDict { 
    if (parser == firstViewController.parser) { 
     // first tab called this parser delegate method, insert code to parse it here 
    } else if (parser == firstViewController.parser) { 
     // second...and so on 
    } 
}