解析一个XML文件-Yahoo天气(xml文件有属性值)

最新推荐文章于 2025-08-28 11:25:33 发布

原创最新推荐文章于 2025-08-28 11:25:33 发布 · 1.1k 阅读

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文章标签：

#xml #attributes #application #c

本文介绍了一个简单的iOS应用如何使用NSXMLParser从Yahoo! Weather API获取天气预报RSS数据，并解析这些数据来显示广州的当前温度及天气图标。

首先H文件：

NSMutableArray *rssList;

M文件，开始解析：

- (void)applicationDidFinishLaunching:(UIApplication *)application { // Add the tab bar controller's current view as a subview of the window [window addSubview:tabBarController.view]; rssList = [[NSMutableArray alloc] initWithCapacity:1]; NSString *urlz=[NSString stringWithFormat:@"http://xml.weather.yahoo.com/forecastrss?p=CHXX0037&u=c"]; NSXMLParser *firstParser = [[NSXMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:urlz]]; [firstParser setDelegate:self]; [firstParser parse]; }

解析方法：

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *) qualifiedName attributes:(NSDictionary *)attributeDict { if ([elementName compare:@"yweather:condition"] == NSOrderedSame) { [rssList addObject:[[NSDictionary alloc] initWithObjectsAndKeys: [attributeDict objectForKey:@"code"],@"code", [attributeDict objectForKey:@"temp"],@"temp", nil]]; } }

-(void)parserDidEndDocument:(NSXMLParser *)parser{ [parser release]; }

获得数据：

navlabel = [[UILabel alloc] initWithFrame:CGRectMake(240, 20, 80, 42)]; navlabel.backgroundColor = [UIColor colorWithRed:0.85 green:0.90 blue:0.90 alpha:0]; navlabel.text = [@"广州/n" stringByAppendingString:[[[rssList objectAtIndex:0] objectForKey:@"temp"] stringByAppendingString:@"度"]]; navlabel.numberOfLines = 2; navlabel.font = [UIFont systemFontOfSize:12]; navlabel.textColor = [UIColor colorWithRed:0.99 green:0.99 blue:0.99 alpha:0.8]; [self.window addSubview:navlabel]; UIImageView *imgz = [[UIImageView alloc] initWithFrame: CGRectMake(270, 17, 44,44)]; imgz.image = [UIImage imageNamed:[[[rssList objectAtIndex:0] objectForKey:@"code"] stringByAppendingString:@".gif"]]; [self.window addSubview:imgz]; [imgz release];