iOS之UUIUIPickview (二)

=======省市二级联动=====

#import <Foundation/Foundation.h>

@interface CZProvince : NSObject

/** 省的名称 */

@property (nonatomic,copy) NSString *name;

/** 对应的城市数据 */

@property (nonatomic,strong) NSArray *cities;

+ (instancetype)provinceWithDict:(NSDictionary *)dict;

- (instancetype)initWithDict:(NSDictionary *)dict;

@end

*********************************

#import "CZProvince.h"

@implementation CZProvince

- (instancetype)initWithDict:(NSDictionary *)dict

{

    self = [superinit];

    if (self) {

        [selfsetValuesForKeysWithDictionary:dict];

    }

    returnself;

}

+ (instancetype)provinceWithDict:(NSDictionary *)dict {

    return [[selfalloc] initWithDict:dict];

}

**************************

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

*****************

#import "ViewController.h"

#import "CZProvince.h"

@interface ViewController () <UIPickerViewDelegate,UIPickerViewDataSource>

@property (weak,nonatomic) IBOutletUIPickerView *pickerView;

@property (weak,nonatomic) IBOutletUILabel *provinceLbl;

@property (weak,nonatomic) IBOutletUILabel *cityLbl;

// 省模型的数组

@property (nonatomic,strong) NSArray *provinces;

// 保存上一次显示或选中的省

@property (nonatomic,strong) CZProvince *selPro;

@end

@implementation ViewController

- (void)viewDidLoad {

    [superviewDidLoad];

 

    // 设置数据源.代理对象

    self.pickerView.dataSource =self;

    self.pickerView.delegate =self;

    

    // 设置默认的选中

    [selfpickerView:self.pickerViewdidSelectRow:0 inComponent:0];

}

#pragma mark - 代理方法

//在label上显示

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

    

    // 如果滚动的是第0列,要刷新第1列城市数据

    if (component == 0) {

        [pickerView reloadComponent:1];

        // 选中第1列第0行

        [pickerView selectRow:0inComponent:1 animated:YES];

    }

    // 获取省的名称获取市的名称

    // 得获取pickerView第0列的选中行第1列的选中行

    NSInteger selProIdx = [pickerViewselectedRowInComponent:0];

    NSInteger selCityIdx = [pickerViewselectedRowInComponent:1];

    

    // 设置省

    CZProvince *selPro =self.provinces[selProIdx];

    self.provinceLbl.text = selPro.name;

    

    // 设置市

//    self.cityLbl.text = selPro.cities[selCityIdx];

    self.cityLbl.text =self.selPro.cities[selCityIdx];//注意用保存的省得模型去赋值

    

}

// 返回显示的内容

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {

    

    NSLog(@"titleForRow");

    

    // 如果是第0列,直接返回省的名称

    if (component == 0) {

        CZProvince *pro =self.provinces[row];

        return pro.name;

    } else {

    

//        // 如果是第1列,根据省确定市的数据

//        NSInteger selProIdx = [pickerView selectedRowInComponent:0];

//        CZProvince *selPro = self.provinces[selProIdx];//获取省得模型

//        

//        // 城市的数组

//        NSArray *cities = selPro.cities;

//        

//        // 返回内容

//        return cities[row];

        

        returnself.selPro.cities[row];

        

    }

}

#pragma mark - 数据源方法

// 返回组的数量

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {

    return 2;

}

// 返回每一组有多少行

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {

    // 如果是第0列,行数就是模型数量

    if (component == 0) {

        returnself.provinces.count;

    } else {

        // 如果是第1列,根据第0列的省确定城市的数量

        // 1. 获取第0列选中下标

        NSInteger selProIdx = [pickerViewselectedRowInComponent:0];

        

        // 2. 根据下标去获取省模型

        CZProvince *selPro =self.provinces[selProIdx];

        

        

        // 保存选中的省模型

        self.selPro = selPro;

        

        returnself.selPro.cities.count;

    

        

//        // 3. 到模型中获取城市数量

//        return selPro.cities.count;

    

    }

}

#pragma mark - 懒加载

- (NSArray *)provinces {

    if (_provinces ==nil) {

        

        // 获取文件路径转为字典数组

        NSArray *dictArr = [NSArrayarrayWithContentsOfFile:[[NSBundlemainBundle] pathForResource:@"02cities.plist"ofType:nil]];

        

        // 遍历数组转为模型数组

//        for (<#initialization#>; <#condition#>; <#increment#>) {

//            <#statements#>

//        }

//        for (<#type *object#> in <#collection#>) {

//            <#statements#>

//        }

//        for (id obj in dictArr) {

//            NSDictionary *dict = (NSDictionary *)obj;

//            CZProvince *pro = [CZProvince provinceWithDict:dict];

//        }

        

        // 通过block遍历

        // 临时数组保存所有的模型

        NSMutableArray *tempArrM = [NSMutableArrayarrayWithCapacity:dictArr.count];

        [dictArr enumerateObjectsUsingBlock:^(NSDictionary *_Nonnull obj,NSUInteger idx, BOOL *_Nonnull stop) {

            

            CZProvince *province = [CZProvinceprovinceWithDict:obj];

            [tempArrM addObject:province];

            

        }];

        

        _provinces = tempArrM;

        

    }

    return_provinces;

}

=========省市区三级联动========

//解析plist文件

-(void)parsePlistFile{

    NSString *path=[[NSBundlemainBundle]pathForResource:@"area.plist"ofType:nil];

    NSArray *arr=[NSArrayarrayWithContentsOfFile:path];

    

    NSLog(@"plist---arr---%@",arr);

    NSArray *modalArr=[LYHomeProvinceModalobjectArrayWithFilename:@"area.plist"];//字典转模型

   

    self.provinceArr=modalArr;

    

    

}

//确定省市区编码

-(void)surePronvinceAndCityAndZone{

    [selfparsePlistFile];//解析plist文件

    UIView *bgv=[[UIViewalloc]initWithFrame:CGRectMake(0,HEIGHT/2, WIDTH, HEIGHT/2)];

    self.bgv=bgv;

    bgv.backgroundColor=[UIColorcolorWithWhite:0.9 alpha:1];

    [self.viewaddSubview:bgv];

    UIPickerView *pickview=[[UIPickerViewalloc]initWithFrame:CGRectMake(0, 30,WIDTH, HEIGHT/2-30)];

    pickview.backgroundColor=[UIColorcolorWithWhite:0.9 alpha:1];

    [bgv addSubview:pickview];

    pickview.delegate=self;

    pickview.dataSource=self;

    self.pickview=pickview;

    

    UIButton *cancelbtn=[[UIButtonalloc]initWithFrame:CGRectMake(WIDTH-140, 0, 60, 30)];

    [cancelbtn setTitleColor:[UIColorcolorWithRed:39.0/255 green:131.0/255 blue:207.0/255alpha:1] forState:UIControlStateNormal];

    [cancelbtn setTitle:@"取消"forState:UIControlStateNormal];

    [bgv addSubview:cancelbtn];

    [cancelbtn addTarget:selfaction:@selector(cancelClick)forControlEvents:UIControlEventTouchDown];

    

    UIButton *surebtn=[[UIButtonalloc]initWithFrame:CGRectMake(WIDTH-70, 0, 60, 30)];

    [surebtn setTitle:@"确定"forState:UIControlStateNormal];

    [bgv addSubview:surebtn];

[surebtn setTitleColor:[UIColorcolorWithRed:39.0/255 green:131.0/255 blue:207.0/255alpha:1] forState:UIControlStateNormal];

    [surebtn addTarget:selfaction:@selector(sureClick)forControlEvents:UIControlEventTouchDown];

    

    // 设置默认的选中

    [selfpickerView:self.pickviewdidSelectRow:0 inComponent:0];

}

-(void)cancelClick{

    NSLog(@"点击执行");

    CGRect frame=self.bgv.frame;

    frame.origin.y=HEIGHT;

    self.bgv.frame=frame;

    

    self.bgv.alpha=0;

}

-(void)sureClick{

    

    CGRect frame=self.bgv.frame;

    frame.origin.y=HEIGHT;

    self.bgv.frame=frame;

    

    self.bgv.alpha=0;

}

#pragma mark - 代理方法

//选中一行 

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

   

    

    if(component==0){

         NSInteger provincenum = [pickerViewselectedRowInComponent:0];//第1列选中的行--省

     LYHomeProvinceModal *provincemodal  =self.provinceArr[provincenum];

        self.provinceModal=provincemodal;

        self.provinceStr=provincemodal.state;

        // 如果滚动的是第0列,要刷新第1列城市数据

            [pickerView reloadComponent:1];

       

        // 选中第1列第0行

        [pickerView selectRow:0inComponent:1 animated:YES];

        

        LYHomeCityModal *citymodal=provincemodal.cities[0];//每次刚启动时选择了省之后，市默认是0行

        self.cityStr=citymodal.city;

        

        if(citymodal.areas.count>0){

        self.zoneStr=citymodal.areas[0];

        }else {

        self.zoneStr=@"";

        }

        

        if(self.provinceModal.cities[0]){//选择省的时候刷新完市，再刷新区

            // 如果滚动的是第1列,要刷新第2列城市数据

            [pickerView reloadComponent:2];

            // 选中第2列第0行

            [pickerView selectRow:0inComponent:2 animated:YES];

            

        }

        

    }elseif(component==1){

        LYHomeProvinceModal *provincemodal=self.provinceModal;

        NSInteger citynum = [pickerViewselectedRowInComponent:1];//第2列选中的行--市

        LYHomeCityModal *citymodal=provincemodal.cities[citynum];

        self.cityStr=citymodal.city;

        if(citymodal.areas.count>0){

        self.zoneStr=citymodal.areas[0];//选择了市之后区默认选择的是0行；

        }elseif(citymodal.areas.count==0){

        self.zoneStr=@"";

        }

       

         // 如果滚动的是第1列,要刷新第2列城市数据

        [pickerView reloadComponent:2];

        // 选中第2列第0行

        [pickerView selectRow:0inComponent:2 animated:YES];

    }elseif(component==2){

     NSInteger zonenum = [pickerViewselectedRowInComponent:2];//第3列选中的行--区

        LYHomeCityModal *citymodal=self.citymodal;

        if(citymodal.areas.count==0){

            self.zoneStr=@"";

        }else {

         self.zoneStr=citymodal.areas[zonenum];

        }

       

    }

    

    self.provinceAndCityAndZone(self.provinceStr,self.cityStr,self.zoneStr);//block调用传值

    

}

//// 返回每一行显示的内容

//- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {

//    if(component==0){

//     LYHomeProvinceModal *provinceModal=self.provinceArr[row];

//    return provinceModal.state;

//        

//    }else if(component==1){

//        LYHomeProvinceModal *provinceModal=self.provinceModal;

//        LYHomeCityModal *citymodal=provinceModal.cities[row];

//        return citymodal.city;

//        

//    }else if(component==2){

//        

//        LYHomeCityModal *citymodal=self.citymodal;

//        return citymodal.areas[row];

//    }

//    return @"安徽";

//}

//-自定义的显示，可以自己设置字体大小字体颜色

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{

   

    UIView *v=[[UIViewalloc]initWithFrame:CGRectMake(0, 0,WIDTH/3-20,30)];

     UILabel *lbl=[[UILabelalloc]initWithFrame:CGRectMake(20, 0,WIDTH/3-20,30)];

    [v addSubview:lbl];

    lbl.font=[UIFontsystemFontOfSize:15];

    if(component==0){

        LYHomeProvinceModal *provinceModal=self.provinceArr[row];

        lbl.text=provinceModal.state;

        

        

    }elseif(component==1){

        LYHomeProvinceModal *provinceModal=self.provinceModal;

        LYHomeCityModal *citymodal=provinceModal.cities[row];

        lbl.text=citymodal.city;

      

        

    }elseif(component==2){

        

        LYHomeCityModal *citymodal=self.citymodal;

         lbl.text=citymodal.areas[row];

        

    }

   

    return v;

}

#pragma mark - 数据源方法

// 返回有多少列"组"

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {

    

    return 3;

    

}

// 返回每一组有多少行

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {

    if(component==0){//省

        returnself.provinceArr.count;

    }elseif(component==1){//市

        NSInteger provincenum = [pickerViewselectedRowInComponent:0];//第1列选中的行

        

        // 2. 根据下标去获取省模型

       LYHomeProvinceModal *provinceModal =self.provinceArr[provincenum];

        self.provinceModal=provinceModal;//保存选中的省模型

        return provinceModal.cities.count;

    }elseif(component==2){//区

        NSInteger citynum = [pickerViewselectedRowInComponent:1];//第2列选中的行

        NSLog(@"--区---%tu",citynum);

        LYHomeProvinceModal *provinceModal=self.provinceModal;

        LYHomeCityModal *citymodal=provinceModal.cities[citynum];//选中的市模型

        self.citymodal=citymodal;//保存市模型

        NSArray *zoneArr=citymodal.areas;

        NSLog(@"--zonearr--%tu",zoneArr.count);

        return zoneArr.count;

    }

    

    // 返回行数

    return 10;

}