iOS XML/JSON解析
浏览数：18 /
时间：2015年06月11日
<a target=_blank href="http://download.csdn.net/detail/vaercly/7908319">点击打开下载链接iOS,XML/JSON解析</a> // FInterPreterVC.m // FInterpreter // // Created by lanouhn on 14-9-11. // Copyright (c) 2014年 [email protected] 陈聪雷. All rights reserved. // #import "FInterPreterVC.h" #import "Person.h" #import "GDataXMLNode.h" #import "JSONKit.h" @interface FInterPreterVC ()<NSXMLParserDelegate> @property (nonatomic, retain) NSMutableArray *arr;//用来存储person对象 @property (nonatomic, retain) Person *per;//用来存储信息 @property (nonatomic, retain) NSString *str;//存储读到的字符串 @end @implementation FInterPreterVC - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } /** * 解析:按照一种约定好的格式(假象), 有后台开发人员, 按照格式存数据, 由前端按照格式取数据(谨记: 这种格式是由后台开发人员决定的, 我们无权决定) 解析的本质: 按照约定好的格式取出我们想要数据的过程 当今比较流行的格式:XML和JSON格式 XML解析两种解析原理: SAX解析:基于事件回调的解析机制, 就是使用协议以及代理. SAX解析是逐行解析, 读入数据时只读入一行, 一行一行的解析, 所以SAX解析占用内存较小, 适合于大数据解析 DOM解析:一次性将内容全部读入内存, 将内容读成树形结构, 逐层解析, 适合小数据解析 */ - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor whiteColor]; UILabel *XMLLabel = [[UILabel alloc] initWithFrame:CGRectMake(110, 30, 100, 30)]; XMLLabel.text = @"XML解析"; XMLLabel.textAlignment = NSTextAlignmentCenter; [self.view addSubview:XMLLabel]; [XMLLabel release]; UILabel *JSONLabel = [[UILabel alloc] initWithFrame:CGRectMake(110, 200, 100, 30)]; JSONLabel.text = @"JSON解析"; JSONLabel.textAlignment = NSTextAlignmentCenter; [self.view addSubview:JSONLabel]; [JSONLabel release]; NSArray *titles = @[@"SAX解析",@"Dom解析第一种方式",@"Dom解析第二种方式",@"系统解析",@"字符串解析",@"数组解析",@"字典解析",@"Data解析"]; NSArray *methods = @[@"handleSAX:",@"handleDomBtn1:",@"handleDomBtn2:",@"handleSystemJSON:",@"handleStrBtn:",@"handleArrBtn:",@"handleDicBtn:",@"handleDataBtn:"]; CGFloat height = 70; for (int i = 0; i < 8; i++) { UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; btn.frame = CGRectMake(60, height, 200, 30); btn.backgroundColor = [UIColor greenColor]; [btn setTitle:titles[i] forState:UIControlStateNormal]; SEL selector = NSSelectorFromString(methods[i]); [btn addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; if (i == 2) { height = 200; } height += 40; } UILabel *text = [[UILabel alloc] initWithFrame:CGRectMake(110, 470, 100, 30)]; text.text = @"加油!"; text.textAlignment = NSTextAlignmentCenter; [self.view addSubview:text]; [text release]; } //SAX解析 - (void)handleSAX:(UIButton *)btn { //1 获取解析的文件路径 NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"Person" ofType:@"xml"]; //2 根据文件路径初始化NSData对象 NSData *data = [NSData dataWithContentsOfFile:xmlPath]; //3 创建解析工具对象 NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data]; //4 设置代理 parser.delegate = self; //5 开始解析 [parser parse]; } #pragma mark - NSXMLParserDetegate //当读取到开始标签时触发 - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { NSLog(@"start %@", attributeDict); //当数据存储到开始标签的属性中时, 处理方式 if ([elementName isEqualToString:@"Persons"]) { //为数组开辟空间 self.arr = [NSMutableArray array]; } else if ([elementName isEqualToString:@"person"]) { //为person对象开辟空间 self.per = [[[Person alloc] init] autorelease]; [self.arr addObject:self.per]; } else if ([elementName isEqualToString:@"name"]) { self.per.name = attributeDict[@"name"]; } else if ([elementName isEqualToString:@"gender"]) { self.per.gender = attributeDict[@"gender"]; } else if ([elementName isEqualToString:@"age"]) { self.per.age = attributeDict[@"age"]; } else if ([elementName isEqualToString:@"phoneNumber"]) { self.per.phoneNumber = attributeDict[@"phoneNumber"]; } else if ([elementName isEqualToString:@"imageName"]) { self.per.imageName = attributeDict[@"imageName"]; } //当数据存储到开始标签以及结束标签中时, 处理方式 /* if ([elementName isEqualToString:@"Persons"]) { //为数组开辟空间 self.arr = [NSMutableArray array]; } else if ([elementName isEqualToString:@"person"]) { //为perosn对象开辟空间 self.per = [[[Person alloc] init] autorelease]; } */ } //当读到标签后的内容时触发 - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { // NSLog(@"content %@", string); //保存读取到得数据 // self.str = string; } //当读取到结束标签时触发 - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { NSLog(@"end %@", elementName); /* if ([elementName isEqualToString:@"name"]) { self.per.name = self.str; } else if ([elementName isEqualToString:@"gender"]) { self.per.gender = self.str; } else if ([elementName isEqualToString:@"age"]) { self.per.age = self.str; } else if ([elementName isEqualToString:@"phoneNumber"]) { self.per.phoneNumber = self.str; } else if ([elementName isEqualToString:@"imageName"]) { self.per.imageName = self.str; } else if ([elementName isEqualToString:@"person"]) { //当读到person的结束标签时, person对象已经赋值完毕, 存储到数组中 [self.arr addObject:self.per]; } */ } //当解析完毕之后触发 - (void)parserDidEndDocument:(NSXMLParser *)parser { NSLog(@"game over"); NSLog(@"%@", self.arr); } //DOM解析第一种方式 /** * DOM解析使用Google提供的一个开源高效的解析工具GDataXMLNode, 它的效果要比NSXMLParser要快10倍 使用方式: 1 先导入系统动态链接库 libxml2.2.dylib 2 在buildSettings中的Header Search Path中添加/usr/include/libxml2 3 在buildSettings中的Other Linker Flags中添加-lxml2 */ - (void)handleDomBtn1:(UIButton *)btn { //1 获取解析文件的路径 NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"Person" ofType:@"xml"]; //2 初始化xml字符串 NSString *xmlStr = [NSString stringWithContentsOfFile:xmlPath encoding:NSUTF8StringEncoding error:nil]; //3 初始化一个GDataXMLDocument对象, 因为解析时所有的内容都是从该对象中读取(所以需要将要解析的内容存在该对象中) GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil]; //4 获取根节点 GDataXMLElement *rootElement = [document rootElement]; //5 获取根节点的所有子节点 NSArray *personElements = [rootElement elementsForName:@"person"]; //6 先获取数组得到每一个person节点, 然后再得到perosn节点下的子节点 for (GDataXMLElement *element in personElements) { //获取perosn节点下的name节点 GDataXMLElement *nameElement = [[element elementsForName:@"name"] firstObject]; //获取perosn节点下的gender节点 GDataXMLElement *genderElement = [[element elementsForName:@"gender"] firstObject]; //获取perosn节点下的age节点 GDataXMLElement *ageElement = [[element elementsForName:@"age"] firstObject]; //获取perosn节点下的imageName节点 GDataXMLElement *imageNameElement = [[element elementsForName:@"imageName"] firstObject]; //获取perosn节点下的phoneNumber节点 GDataXMLElement *phoneNumberElement = [[element elementsForName:@"phoneNumber"] firstObject]; //1 获取开始标签与结束标签的值 /* NSString *name = [nameElement stringValue]; NSString *gender = [genderElement stringValue]; NSString *age = [ageElement stringValue]; NSString *imageName = [imageNameElement stringValue]; NSString *phoneNumber = [phoneNumberElement stringValue]; NSLog(@"=======%@ %@ %@ %@ %@", name, gender, age, imageName, phoneNumber); */ //2 获取表现中属性中存储的数据 //属性对应的类是GDataXMLNode GDataXMLNode *nameNode = [nameElement attributeForName:@"name"]; GDataXMLNode *genderNode = [genderElement attributeForName:@"gender"]; GDataXMLNode *ageNode = [ageElement attributeForName:@"age"]; GDataXMLNode *imageNameNode = [imageNameElement attributeForName:@"imageName"]; GDataXMLNode *phoneNumberNode = [phoneNumberElement attributeForName:@"phoneNumber"]; NSString *name = [nameNode stringValue]; NSString *gender = [genderNode stringValue]; NSString *age = [ageNode stringValue]; NSString *phoneNumber = [phoneNumberNode stringValue]; NSString *imageName = [imageNameNode stringValue]; NSLog(@"%@ %@ %@ %@ %@", name, gender, age, phoneNumber, imageName); } } - (void)handleDomBtn2:(UIButton *)btn { //1 获取解析文件的路径 NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"Person" ofType:@"xml"]; //2 初始化xml字符串 NSString *xmlStr = [NSString stringWithContentsOfFile:xmlPath encoding:NSUTF8StringEncoding error:nil]; //3 初始化一个GDataXMLDocument对象, 因为解析时所有的内容都是从该对象中读取(所以需要将要解析的内容存在该对象中) GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithXMLString:xmlStr options:0 error:nil]; /** * XPath 只要给定相对路径即可, 如://name, 只要能够到达name, 都可以把name获取到 */ //4 获取所有的name节点 NSArray *nameElements = [document nodesForXPath:@"//name" error:nil]; //获取所有的gender节点 NSArray *genderElements = [document nodesForXPath:@"//gender" error:nil]; //获取所有的age节点 NSArray *ageElements = [document nodesForXPath:@"//age" error:nil]; //获取所有的imageName节点 NSArray *imageNameElements = [document nodesForXPath:@"//imageName" error:nil]; //获取所有的phoneNumber节点 NSArray *phoneNumberElements = [document nodesForXPath:@"//phoneNumber" error:nil]; //通过循环取出每个节点 for (int i = 0; i < 3; i++) { GDataXMLElement *nameElement = nameElements[i]; GDataXMLElement *genderElement = genderElements[i]; GDataXMLElement *ageElement = ageElements[i]; GDataXMLElement *imageNameElement = imageNameElements[i]; GDataXMLElement *phoneNumberElement = phoneNumberElements[i]; NSString *name = [nameElement stringValue]; NSString *gender = [genderElement stringValue]; NSString *age = [ageElement stringValue]; NSString *imageName = [imageNameElement stringValue]; NSString *phoneNumber = [phoneNumberElement stringValue]; NSLog(@"-------%@ %@ %@ %@ %@", name, gender, age, imageName, phoneNumber); } } //系统的解析方式 - (void)handleSystemJSON:(UIButton *)btn { //1 获取文件路径 NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"]; //2 初始化NSData对象 NSData *data = [NSData dataWithContentsOfFile:filePath]; //3 解析 NSMutableArray *arr = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil]; NSLog(@"%@", arr); } //JSONKit类的解析方式 /** * 对于JSONKit 提供的解析方式,是为NSString,NSData添加分类的方式,在分类中添加了解析的方法.效率仅次于系统的. 将json格式数据解析成NSArray,NSDictionary. 而为NSArray,NSDictionary添加的分类的方法,则是将OC的对象,转化为JSON格式字符串. * */ - (void)handleStrBtn:(UIButton *)btn { //1 获取文件路径 NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"]; //2 初始化NSString对象 NSString *jsonStr = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil]; //3 解析 NSArray *arr = [jsonStr objectFromJSONString]; NSLog(@"%@", arr); } - (void)handleArrBtn:(UIButton *)btn { //1 将OC的数组转换为json格式化字符串 NSArray *arr = @[@1,@"bb",@"cc",@"dd",@"ee"]; //转化 NSString *jsonStr = [arr JSONString]; NSLog(@"%@", jsonStr); //2 解析 NSString *str = [jsonStr objectFromJSONString]; NSLog(@"%@", str); } - (void)handleDicBtn:(UIButton *)btn { //1 将OC的字典转换为json格式化字符串 NSDictionary *dic = @{@"name":@1,@"gender":@"man",@"age":@"18"}; //转化 NSString *jsonStr = [dic JSONString]; NSLog(@"%@", jsonStr); //2 解析 NSString *str = [jsonStr objectFromJSONString]; NSLog(@"%@", str); } - (void)handleDataBtn:(UIButton *)btn { //1 获取文件路径 NSString *fileParth = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"]; //2 初始化NSData对象 NSData *jsonData = [NSData dataWithContentsOfFile:fileParth]; //3 解析 NSArray *arr = [jsonData objectFromJSONData]; NSLog(@"%@", arr); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } /* #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */ - (void)dealloc { self.arr = nil; self.per = nil; self.str = nil; [super dealloc]; } @end
郑重声明：本站内容如果来自互联网及其他传播媒体，其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享，并不代表本站赞同其观点和对其真实性负责，也不构成任何其他建议。
