NSXMLParser解析器：解析xml时未触发didStartElement
我正在尝试解析 xml 文件并且没有收到错误，但是在尝试读取它时，解析器：didStartElement 事件未触发。我做错了什么？感谢您的帮助。
- (void)viewDidLoad
{
[super viewDidLoad];
// xml connect
NSURL *url = [[NSURL alloc] initWithString:@"http://www.test.com/list.xml"];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url];
//Start parsing the XML file.
BOOL success = [xmlParser parse];
if(success)
NSLog(@"No Errors");
else
NSLog(@"Error!");
}
// reading xml...
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName
attributes:(NSDictionary *)attributeDict {
if([elementName isEqualToString:@"main"]) {
//Initialize the array.
apps = [[NSMutableArray alloc] init];
}
else if([elementName isEqualToString:@"prog"]) {
//Extract the attribute here.
idUsuari = [attributeDict objectForKey:@"Id"];
NSLog(@"ID: %@", idUser);
}
}
I am trying to parse xml file and get no errors but when trying to read it, parser:didStartElement event is not triggered. What I am doing wrong? Thanks for help.
- (void)viewDidLoad
{
[super viewDidLoad];
// xml connect
NSURL *url = [[NSURL alloc] initWithString:@"http://www.test.com/list.xml"];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url];
//Start parsing the XML file.
BOOL success = [xmlParser parse];
if(success)
NSLog(@"No Errors");
else
NSLog(@"Error!");
}
// reading xml...
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName
attributes:(NSDictionary *)attributeDict {
if([elementName isEqualToString:@"main"]) {
//Initialize the array.
apps = [[NSMutableArray alloc] init];
}
else if([elementName isEqualToString:@"prog"]) {
//Extract the attribute here.
idUsuari = [attributeDict objectForKey:@"Id"];
NSLog(@"ID: %@", idUser);
}
}
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您尚未将视图控制器设置为 XML 解析器的委托：
在分配/初始化之后。如果没有这个，解析器就不知道将委托消息发送给谁。
You haven't set your view controller as the XML Parser's delegate:
After you alloc / init. Without this the parser does not know who to send the delegate messages to.
然后在解析之前声明您当前的类符合
NSXMLParserDelegate，以便解析器知道可以调用您实现的委托方法。
例如
declare that your current class conforms to
NSXMLParserDelegate, thenbefore you parse, so the parser knows can call the delegate methods implemented by you.
eg
再次运行后请将此添加到 Info.plist
Please add this to Info.plist after run again