iOS解析XML实现省市区选择

1、具体内容就不再赘述了。直接看关键代码。

viewController.h

//
//  ViewController.h
//  ParseXmlToRealizeChooseCityDemo
//
//  Created by zhanggui on 15/7/25.
//  Copyright (c) 2015年 zhanggui. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIPickerViewDataSource,UIPickerViewDelegate,NSXMLParserDelegate>

- (IBAction)getAction:(UIButton *)sender;

@property (weak, nonatomic) IBOutlet UIPickerView *pickerView;
@end

　　viewController.m

//
//  ViewController.m
//  ParseXmlToRealizeChooseCityDemo
//
//  Created by zhanggui on 15/7/25.
//  Copyright (c) 2015年 zhanggui. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
NSMutableDictionary *province,*city;
NSMutableArray *provinceArr,*cityArr,*areaArr;
NSString *tempProvince,*tempCity,*tempArea;

NSArray *finalProvinceArr,*finalCityArr,*finalAreaArr;

NSString *seletedStr;
}

@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];

NSString *xmlFilePath = [[NSBundle mainBundle]pathForResource:@"province_data" ofType:@"xml"];
NSData *data = [NSData dataWithContentsOfFile:xmlFilePath];
NSXMLParser *xmlParser = [[NSXMLParser alloc]initWithData:data];
xmlParser.delegate = self;
province = [NSMutableDictionary new];
city = [NSMutableDictionary new];
provinceArr = [NSMutableArray new];
cityArr = [NSMutableArray new];
[xmlParser parse];

finalProvinceArr = [province allKeys];

NSDictionary *tempCityDic = [province objectForKey:[finalProvinceArr objectAtIndex:0]];
finalCityArr = [tempCityDic allKeys];

finalAreaArr = [tempCityDic objectForKey:[finalCityArr objectAtIndex:0]];
}
#pragma mark - xmlParseDelegateMethod
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if ([elementName isEqualToString:@"province"]) {
tempProvince = [attributeDict objectForKey:@"name"];
}
if ([elementName isEqualToString:@"city"]) {
tempCity = [attributeDict objectForKey:@"name"];
areaArr = [NSMutableArray new];
}else if ([elementName isEqualToString:@"district"]) {
[areaArr addObject:[attributeDict objectForKey:@"name"]];
}
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:@"city"]) {
NSMutableArray *temp =[[NSMutableArray alloc] initWithArray:areaArr] ;
[city setValue:temp forKey:tempCity];
[areaArr removeAllObjects];
}else if ([elementName isEqualToString:@"province"]) {
NSDictionary *tempDic = [[NSDictionary alloc] initWithDictionary:city];
[province setValue:tempDic forKey:tempProvince];
[city removeAllObjects];

}
}

#pragma mark - UIPickerViewDeletate
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 3;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
if(component==0) {
return [finalProvinceArr count];
}else if (component==1) {
return [finalCityArr count];
}else {
return [finalAreaArr count];
}
}

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
if (component==0) {
return finalProvinceArr[row];
}else if (component==1) {
return finalCityArr[row];
}else
{
return finalAreaArr[row];
}
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
if (component==0) {
finalCityArr =[[province objectForKey:[finalProvinceArr objectAtIndex:row]] allKeys];
[pickerView selectRow:0 inComponent:1 animated:NO];
[pickerView reloadComponent:1];

if ([finalCityArr count]!=0) {
NSString *selectedProvince = [self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:0] forComponent:0];
NSString *selectedCity = [self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:1] forComponent:1];
finalAreaArr = [[province objectForKey:selectedProvince] objectForKey:selectedCity];
[pickerView selectRow:0 inComponent:2 animated:NO];
[pickerView reloadComponent:2];
}
}else if (component==1) {
NSString *selectedProvince = [self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:0] forComponent:0];
NSString *selectedCity = [self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:1] forComponent:1];
finalAreaArr = [[province objectForKey:selectedProvince] objectForKey:selectedCity] ;
[pickerView selectRow:0 inComponent:2 animated:NO];
[pickerView reloadComponent:2];
//        finalAreaArr = [province objectForKey:[province objectForKey:<#(id)#>]];
}
NSString *pro =[self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:0] forComponent:0];
NSString *cit =[self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:1] forComponent:1];
NSString *are = [self pickerView:pickerView titleForRow:[pickerView selectedRowInComponent:2] forComponent:2];
seletedStr =[NSString stringWithFormat:@"%@%@%@",pro,cit,are];
}
#pragma mark - UIButton Method
- (IBAction)getAction:(UIButton *)sender {
UIAlertView *aler = [[UIAlertView alloc] initWithTitle:@"选中结果" message:seletedStr delegate:self cancelButtonTitle:@"确定" otherButtonTitles: nil];
[aler show];
}
@end

2、province_data.xml文件下载地址：http://pan.baidu.com/s/1c0Cr9ja

3、源码下载地址：https://github.com/ScottZg/GetProvinceCityAreaByXMLFile

4、有什么疑问欢迎评论提问。