NSXMLParser简单示例

Question

大多数如何调用NSXMLParser的示例都包含在涉及Apps的复杂项目中.什么是演示回调的简单示例.

Answer 1

作为探索NSXMLParser的一部分,我创建了以下非常简单的代码.

的main.m

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSLog(@"Main Started");

        NSError *error = nil;

        // Load the file and check the result
        NSData *data = [NSData dataWithContentsOfFile:@"/Users/Tim/Documents/MusicXml/Small.xml"
                                          options:NSDataReadingUncached
                                            error:&error];
        if(error) {
            NSLog(@"Error %@", error);

            return 1;
        }


        // Create a parser and point it at the NSData object containing the file we just loaded
        NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];

        // Create an instance of our parser delegate and assign it to the parser
        MyXmlParserDelegate *parserDelegate = [[MyXmlParserDelegate alloc] init];
        [parser setDelegate:parserDelegate];

        // Invoke the parser and check the result
        [parser parse];
        error = [parser parserError];
        if(error)
        {
            NSLog(@"Error %@", error);

            return 1;
        }

        // All done
        NSLog(@"Main Ended");
    }
    return 0;
}

MyXmlParserDelegate.h

#import <Foundation/Foundation.h>

@interface MyXmlParserDelegate : NSObject <NSXMLParserDelegate>

@end

MyXmlParserDelegate.m

#import "MyXmlParserDelegate.h"

@implementation MyXmlParserDelegate

- (void) parserDidStartDocument:(NSXMLParser *)parser {
    NSLog(@"parserDidStartDocument");
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
    NSLog(@"didStartElement --> %@", elementName);
}

-(void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
    NSLog(@"foundCharacters --> %@", string);
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
    NSLog(@"didEndElement   --> %@", elementName);
}

- (void) parserDidEndDocument:(NSXMLParser *)parser {
    NSLog(@"parserDidEndDocument");
}
@end

我发布它是希望它能帮助别人.