NSXMLParser Degelate方法'parseErrorOccurred：'在iOS 7上永远不会被调用

时间：2013-11-03 12:11:06

标签： iphone ios7 xcode5 nsxmlparser

我已经把头发拉了两天以上来解决这个问题，而且我很难拒绝在这里问一个问题，因为之前可能是别人的问题，但谷歌搜索并阅读Stackoverflow上的所有相关问题比如this或this以及阅读更多教程和测试不同的示例代码，我仍然无法弄清楚这一点。

我有一个RSS解析器应用程序，自从两年前在商店发布以来一直运行良好。这是一个简单的NSXMLParser实现，从那时起我就在很多应用程序中使用它，如果需要的话会做一些小改动。现在我在另一个项目上实现相同的代码，它仍然可以正常工作，但是当我关闭wifi或使用无效的URL进行解析时，它不会在iPhone Simulator或{{1}上引发错误}，而相同的代码在iPhone 5, iOS 7.0.3

上正常工作

这是我的代码：

iPhone 4S, iOS 6.1.3：

NIKFeedParser.h

和#import <Foundation/Foundation.h> #import "NIKFeedEntry.h" @class NIKFeedEntry; @protocol NIKFeedParserDelegate; @interface NIKFeedParser : NSObject <NSXMLParserDelegate> { NIKFeedEntry *currentItem; NSMutableString *currentItemValue; NSMutableArray *feedItems; id<NIKFeedParserDelegate> delegate; NSOperationQueue *retrieverQueue; NSUInteger parsingFeedsWithNumbers; NSOperationQueue *queue; } @property (strong, nonatomic) NIKFeedEntry *currentItem; @property (strong, nonatomic) NSMutableString *currentItemValue; @property (readonly) NSMutableArray *feedItems; @property (strong, nonatomic) id<NIKFeedParserDelegate> delegate; @property (strong, nonatomic) NSOperationQueue *retrieverQueue; @property (nonatomic) NSUInteger parsingFeedsWithNumbers; @property (strong, nonatomic) NSOperationQueue *queue; @property (nonatomic) NSString *selectedCategory; - (void) startProcess; @end @protocol NIKFeedParserDelegate <NSObject> - (void) processCompleted; - (void) processHasErrors; @end ：

NIKFeedParser.m

和我的#import "NIKFeedParser.h" @implementation NIKFeedParser @synthesize currentItem; @synthesize currentItemValue; @synthesize feedItems; @synthesize delegate; @synthesize retrieverQueue; @synthesize parsingFeedsWithNumbers; @synthesize queue; @synthesize selectedCategory; - (id) init { if (![super init]) { return nil; } feedItems = [[NSMutableArray alloc] init]; queue = [NSOperationQueue new]; return self; } - (NSOperationQueue *)retrieverQueue { if (nil == retrieverQueue) { retrieverQueue = [[NSOperationQueue alloc] init]; retrieverQueue.maxConcurrentOperationCount = 1; } return retrieverQueue; } - (void) startProcess { SEL method = @selector (fetchAndParseFeed); [[self feedItems] removeAllObjects]; NSInvocationOperation *op = [[NSInvocationOperation alloc] initWithTarget:self selector:method object:nil]; [self.retrieverQueue addOperation:op]; } - (BOOL)fetchAndParseFeed { parsingFeedsWithNumbers = 0; @autoreleasepool { //NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; //To suppress the leak in NSXMLParser. [[NSURLCache sharedURLCache] setMemoryCapacity:0]; [[NSURLCache sharedURLCache] setDiskCapacity:0]; NSString *file = [[NSBundle mainBundle] pathForResource:@"Feed" ofType:@"plist"]; NSDictionary *item = [[NSDictionary alloc]initWithContentsOfFile:file]; NSArray *array = [item objectForKey:@"Root"]; NSURL *url = [NSURL URLWithString: [[array objectAtIndex:[selectedCategory intValue]]objectForKey:@"URL"]]; BOOL success = NO; NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:url]; [parser setDelegate:self]; [parser setShouldProcessNamespaces:YES]; [parser setShouldReportNamespacePrefixes:YES]; [parser setShouldResolveExternalEntities:NO]; success = [parser parse]; return success; } } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if(nil != qualifiedName) { elementName = qualifiedName; } //NSLog(@"elementName: %@", elementName); if ([elementName isEqualToString:@"item"]) { self.currentItem = [[NIKFeedEntry alloc] init]; parsingFeedsWithNumbers++; } else if([elementName isEqualToString:@"title"] || [elementName isEqualToString:@"description"] || [elementName isEqualToString:@"link"] || [elementName isEqualToString:@"guid"] || [elementName isEqualToString:@"author"]|| [elementName isEqualToString:@"pubDate"]) { self.currentItemValue = [NSMutableString string]; } else { self.currentItemValue = nil; } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if(nil != self.currentItemValue){ [self.currentItemValue appendString:string]; } } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if(nil != qName) { elementName = qName; } if([elementName isEqualToString:@"title"]) { self.currentItem.podcastTitle = self.currentItemValue; // int titleLength = [self.currentItem.title length]; // int len = (titleLength > 70) ? 70: titleLength; // self.currentItem.shortTitle = [self.currentItem.title substringWithRange:NSMakeRange(0, len)]; } else if([elementName isEqualToString:@"link"]) { self.currentItem.podcastURL = self.currentItemValue; } else if([elementName isEqualToString:@"guid"]) { // self.currentItem.guidUrl = self.currentItemValue; } else if ([elementName isEqualToString:@"author"]) { // self.currentItem.author = self.currentItemValue; } else if([elementName isEqualToString:@"pubDate"]) { // self.currentItem.podcastDate = self.currentItemValue; // self.currentItem.pubDate = [FarsiNumbers convertNumbersToFarsi:self.currentItemValue]; } else if([elementName isEqualToString:@"item"]) { [[self feedItems] addObject:self.currentItem]; } } - (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)CDATABlock{ //CDATAblock implementation } - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{ NSLog(@"parseErrorOccurred"); if(parseError.code != NSXMLParserDelegateAbortedParseError) { [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; [(id)[self delegate] performSelectorOnMainThread:@selector(processHasErrors) withObject:nil waitUntilDone:NO]; } } - (void)parserDidEndDocument:(NSXMLParser *)parser { NSLog(@"parserDidEndDocument"); //TitleViewController *viewController = [[TitleViewController alloc] init]; //viewController.parseFinished = @"1"; // parseFinished = [[NSString alloc] initWithFormat:@"%d", 1]; // NSLog(@"rss parser parser finished, %@", viewController.parseFinished); parsingFeedsWithNumbers = 0; [(id)[self delegate] performSelectorOnMainThread:@selector(processCompleted) withObject:nil waitUntilDone:NO]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } @end ：

NIKMasterViewController.m

在主方法上设置断点并跟踪代码，这是调用方法的顺序：

  1. - (void)viewDidLoad { feedParser = [[NIKFeedParser alloc] init]; [[self feedParser] setSelectedCategory:[self selectedCategory]]; [[self feedParser] setDelegate:self]; [[self feedParser] startProcess]; } - (void)processCompleted { [[self tableView] reloadData]; [activityIndicator stopAnimating]; NSInteger rowCount = [[[self feedParser] feedItems] count]; if (rowCount!=0) { // self.tableView.delegate = self; self.tableView.dataSource = self; } else if ((rowCount==0) &&([UIApplication sharedApplication].networkActivityIndicatorVisible == NO ) ){ UILabel *noContentWarning = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 480, 480)]; noContentWarning.text = NO_CONTENT_WARNING_MESSAGE; noContentWarning.center = CGPointMake(self.view.frame.size.width/2, self.view.frame.size.height/3); } } - (void)processHasErrors { //Due to internet connection or server error. UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NO_CONNECTION_ALERT_TITLE message: NO_CONNECTION_ALERT_MESSAGE delegate:self cancelButtonTitle:NO_CONNECTION_ALERT_VIEW_DISMISS_BUTTON otherButtonTitles:nil]; [alert show]; [activityIndicator stopAnimating]; }
  2. NIKFeedParser - init
  3. NIKMasterViewController - viewDidLoad
  4. NIKFeedParser - startProcess
  5. NIKFeedParser - retrieveQueue
  6. NIKFeedParser - startProcess - [self.retrieverQueue addOperation:op];

    7. 然后我有银行表视图控制器，显然不是一个可见的网络指示器，因为wifi关闭，而以前，它能够显示NIKMasterViewController - viewDidLoad告诉我发生了连接错误。 Apple在新的iOS或SDK中有什么变化？或者我错过了什么？

0 个答案:

没有答案
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