1、具体内容就不再赘述了。直接看关键代码。
viewController.h
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//
// 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
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viewController.m
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//
// 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
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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。
