1、介绍：

现在越来越多的项目都用到了地址，尤其是电商O2O的购物平台，我之前做的教育产品和电商产品都用到了，而实现地址的设置用到的技术就是城市级联列表，即普遍的做法就是自定义选择器控件UIPickerView，然后从本地整理的城市plist文件获取省份、城市、县镇三级级联。现在整理一下，分享给大家。

 

2、效果图如下：

 

3、用法：

(1)导入本地城市级联文件：

(2)导入DDMeZonePickerView.h头文件，在控制器通过[UIView Animation]的动画控制创建的DDMeZonePickerView视图对象的frame让其显示或隐藏即可，被选择的城市然后通过block进行回传。

 

4、废话不多说，实现代码如下：

DDMeZonePickerView.h

//  DDMeZonePickerView.h//  BiaoJiePay////  Created by 夏远全 on 16/11/19.//  Copyright © 2016年 广州东德科技. All rights reserved.//#import 
     
      /** *  声明block */typedef void (^adressBlock)(NSString *adress);@interface DDMeZonePickerView : UIView/** *  定义block属性 */@property (copy,nonatomic)adressBlock adressBlock;/** *  传递地址 */-(void)chooseAdressBlock:(adressBlock)adressBlock;@end
     

DDMeZonePickerView.m

////  DDMeZonePickerView.m//  BiaoJiePay////  Created by 夏远全 on 16/11/19.//  Copyright © 2016年 广州东德科技. All rights reserved.//#import "DDMeZonePickerView.h"@interface DDMeZonePickerView ()
     
      /** picker选择器*/@property (strong, nonatomic)UIPickerView *customPicker;/** *  原始省份数组 */@property (strong, nonatomic)NSArray *provinceArray;/** *  原始城市数组 */@property (strong, nonatomic)NSArray *cityArray;/** *  原始区镇数组 */@property (strong, nonatomic)NSArray *townArray;/** *  选择省份字典 */@property (strong, nonatomic)NSDictionary *selectedProvinceDic;/** *  选择城市字典 */@property (strong, nonatomic)NSDictionary *selectedCityDic;/** *  确认 */@property (strong,nonatomic)UIButton *sureButton;/** *  取消 */@property (strong,nonatomic)UIButton *cancelButton;@end@implementation DDMeZonePickerView/** *  懒加载 */-(UIPickerView *)customPicker{    if (!_customPicker) {        _customPicker = [[UIPickerView alloc]init];        _customPicker.dataSource = self;        _customPicker.delegate = self;        _customPicker.backgroundColor = XYQColor(153, 153, 153);    }    return _customPicker;}-(NSArray *)provinceArray{    if (!_provinceArray) {        _provinceArray = [NSArray array];    }    return _provinceArray;}-(NSArray *)cityArray{    if (!_cityArray) {        _cityArray = [NSArray array];    }    return _cityArray;}-(NSArray *)townArray{    if (!_townArray) {        _townArray = [NSArray array];    }    return _townArray;}-(NSDictionary *)selectedProvinceDic{    if (!_selectedProvinceDic) {        _selectedProvinceDic = [NSDictionary dictionary];    }    return _selectedProvinceDic;}-(NSDictionary *)selectedCityDic{    if (!_selectedCityDic) {        _selectedCityDic = [NSDictionary dictionary];    }    return _selectedCityDic;}/** *  初始化 */-(instancetype)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        [self getPickerData];        self.customPicker.frame = CGRectMake(0, 0, SCREEN_WIDTH, frame.size.height);        [self addSubview:self.customPicker];    }    return self;}/** *  从本地文件获取数据 */- (void)getPickerData{        NSString *path = [[NSBundle mainBundle] pathForResource:@"provincecity" ofType:@"plist"];    self.provinceArray = [NSArray arrayWithContentsOfFile:path]; //所有的省份        self.selectedProvinceDic = self.provinceArray[0];    self.cityArray = [self.selectedProvinceDic objectForKey:@"city"];//所有的城市        self.selectedCityDic = self.cityArray[0];    self.townArray = [self.selectedCityDic objectForKey:@"area"];//所有的区/县}#pragma mark UIPickerViewDataSource//设置有多少列-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{    return 3;}//设置每列多少行-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{    if (component == 0) {        return self.provinceArray.count;    } else if (component == 1) {        return self.cityArray.count;    } else {        return self.townArray.count;    }}#pragma mark - UIPickerViewDelegate//自定义字体大小- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{        UILabel *myView = nil;    if (component == 0) {        myView = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 100, 30)] ;        myView.text = [[self.provinceArray objectAtIndex:row] objectForKey:@"name"];            }else if(component == 1){        myView = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, (SCREEN_WIDTH-100)/2, 30)];        myView.text = [[self.cityArray objectAtIndex:row] objectForKey:@"name"];            }else{        myView = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, (SCREEN_WIDTH-100)/2-30, 30)];        myView.text = [[self.townArray objectAtIndex:row] objectForKey:@"name"];    }    myView.textAlignment = NSTextAlignmentCenter;    myView.font = [UIFont systemFontOfSize:17]; //用label来设置字体大小    myView.backgroundColor = [UIColor whiteColor];        return myView;}//设置宽度- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{    return SCREEN_WIDTH/3;}//返回行高- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{    return 39;}//通过代理方法didSelectRows获取数据- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {        if (component == 0) {                //获取省份选中行        self.selectedProvinceDic = self.provinceArray[row];        self.cityArray = [self.selectedProvinceDic objectForKey:@"city"];//所有的城市        self.selectedCityDic = self.cityArray[0];        self.townArray = [self.selectedCityDic objectForKey:@"area"];//所有的区/县        [pickerView reloadComponent:1];        [pickerView reloadComponent:2];            }    if (component == 1) {                //获取城市选中行        NSInteger cityselectedRow = [pickerView selectedRowInComponent:1];        self.selectedCityDic = self.cityArray[cityselectedRow];        self.townArray = [self.selectedCityDic objectForKey:@"area"];//所有的区/县        [pickerView reloadComponent:2];    }        //获取选中的省    NSString *provice = [NSString stringWithFormat:@"%@",[[self.provinceArray objectAtIndex:[pickerView selectedRowInComponent:0]] objectForKey:@"name"]];    //获取选中的市    NSString *city = [NSString stringWithFormat:@"%@",[[self.cityArray objectAtIndex:[pickerView selectedRowInComponent:1]] objectForKey:@"name"]];    //获取选中的县    NSString *town = [NSString stringWithFormat:@"%@",[[self.townArray objectAtIndex:[pickerView selectedRowInComponent:2]] objectForKey:@"name"]];        //赋值    NSString *adressText = [NSString stringWithFormat:@"%@%@%@",provice,city,town];    self.adressBlock(adressText);}/** *  地址传值 */-(void)chooseAdressBlock:(void (^)(NSString *))adressBlock{    if (adressBlock) {        self.adressBlock = [adressBlock copy];    }}@end
     

在ViewController.h懒加载选择器调用block取值：

/** *  选择器 */-(DDMeZonePickerView *)zonePickerView{    if (!_zonePickerView) {        _zonePickerView = [[DDMeZonePickerView alloc]initWithFrame:CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, 240)];        [_zonePickerView chooseAdressBlock:^(NSString *adress) {            self.updateField.text = adress;        }];    }    return _zonePickerView;}

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