0
這可能已經被問了很多，但我仍然輸了。我需要解析從Google Reader的API中檢索到的XML文件。基本上，它包含的對象，如下面：如何提高iOS代碼的XML解析性能？
<object>
<string name="id">feed/http://developer.apple.com/news/rss/news.rss</string>
<string name="title">Apple Developer News</string>
<list name="categories">
<object>
<string name="id">user/17999068807557229152/label/Apple</string>
<string name="label">Apple</string>
</object>
</list>
<string name="sortid">DB67AFC7</string>
<number name="firstitemmsec">1317836072018</number>
<string name="htmlUrl">http://developer.apple.com/news/</string>
</object>
我有嘗試過的NSXMLParser和它的作品，但它實在是太慢了。也許我的代碼不是最高效的，但仍然需要超過10秒才能解析並保存一個對象到Core Data中。我也看了其他幾個庫，但是對於這樣一個小XML文件，它們的使用似乎有點複雜和沉重。
你認爲我應該用什麼？
謝謝。
編輯
這裏解析器代碼：
- (void) saveSubscription {
NSFetchRequest *fetchRequest = [[[NSFetchRequest alloc] init] autorelease];
[fetchRequest setEntity:
[NSEntityDescription entityForName:@"Group" inManagedObjectContext:context]];
[fetchRequest setPredicate: [NSPredicate predicateWithFormat: @"(id == %@)",self.currentCategoryId]];
[fetchRequest setSortDescriptors: [NSArray arrayWithObject:
[[[NSSortDescriptor alloc] initWithKey: @"id"
ascending:YES] autorelease]]];
NSError *error2 = nil;
NSArray *foundGroups = [context executeFetchRequest:fetchRequest error:&error2];
if ([foundGroups count] > 0) {
self.currentGroupObject = [foundGroups objectAtIndex:0];
}
else {
self.currentGroupObject = [NSEntityDescription insertNewObjectForEntityForName:@"Group" inManagedObjectContext:context];
[self.currentGroupObject setId:self.currentCategoryId];
[self.currentGroupObject setLabel:self.currentCategoryLabel];
}
fetchRequest = [[[NSFetchRequest alloc] init] autorelease];
[fetchRequest setEntity:
[NSEntityDescription entityForName:@"Subscription" inManagedObjectContext:context]];
[fetchRequest setPredicate: [NSPredicate predicateWithFormat: @"(id == %@)", self.currentSubscriptionId]];
[fetchRequest setSortDescriptors: [NSArray arrayWithObject:
[[[NSSortDescriptor alloc] initWithKey: @"id"
ascending:YES] autorelease]]];
error2 = nil;
NSArray *foundSubscriptions = [context executeFetchRequest:fetchRequest error:&error2];
if ([foundSubscriptions count] > 0) {
self.currentSubscriptionObject = [foundSubscriptions objectAtIndex:0];
}
else {
self.currentSubscriptionObject = [NSEntityDescription insertNewObjectForEntityForName:@"Subscription" inManagedObjectContext:context];
[self.currentSubscriptionObject setId:self.currentSubscriptionId];
[self.currentSubscriptionObject setTitle:self.currentSubscriptionTitle];
[self.currentSubscriptionObject setHtmlURL:self.currentSubscriptionHtmlURL];
NSString *faviconURL = [self favIconUrlStringFromURL:self.currentSubscriptionHtmlURL];
NSString *faviconPath = [self saveFavicon:self.currentSubscriptionTitle url:faviconURL];
[self.currentSubscriptionObject setFaviconPath:faviconPath];
[self.currentSubscriptionObject setGroup:self.currentGroupObject];
[self.currentGroupObject addSubscriptionObject:self.currentSubscriptionObject];
}
NSError *error;
if (![context save:&error]) {
NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
}
}
如果您要添加代碼，我們可能會幫助您改進它。 – vikingosegundo 2012-02-04 10:50:28
我重新命名了這個問題，因爲「最好的圖書館」問題基本上只是意見，並且您在此場景中尋找特定的perf增強功能，無論它是否涉及新的庫 – 2012-02-05 18:36:28