iOS UIPickView的使用(二)
==注意：pickview上添加按钮点击时会穿透，导致点击按钮没反应，长用做法是吧pickview和按钮都放到另一一个view上，让按钮和pickview没有父子关系。
UIPickView的使用
// 水果
@property(nonatomic,weak)IBOutletUILabel *fruitLbl;
// 主菜
@property(nonatomic,weak)IBOutletUILabel *mainFoodLbl;
// 酒水
@property(nonatomic,weak)IBOutletUILabel *drinkLbl;
@property (nonatomic,strong)NSArray *foods;
@end
@implementation ViewController
- (void)viewDidLoad {
[superviewDidLoad];
// 随机色
// [UIColor colorWithRed:arc4random_uniform(256) / 255.0 green:arc4random_uniform(256) / 255.0 blue:arc4random_uniform(256) / 255.0 alpha:1.0];
// [self pickerView:self.pickerView didSelectRow:0 inComponent:0];
// [self pickerView:self.pickerView didSelectRow:0 inComponent:1];
// [self pickerView:self.pickerView didSelectRow:0 inComponent:2];
//让label启动就显示
for (int i =0; i <self.foods.count; i++) {
[selfpickerView:self.pickerViewdidSelectRow:0inComponent:i];
}
}
#pragma mark - 点击随机点餐按钮的时候调用
- (IBAction)randomBtnClick:(UIButton *)sender {
for (int i =0; i <self.foods.count; i++) {
// 1.让pickerView随机选中
// 生成随机数
// 第i组对应的范围
// 10 11 0~10
NSInteger count = [self.foods[i] count];
u_int32_t randomNumber = arc4random_uniform((int)count);
// 1.2每次的数据都不一样
// 获取当前列选中的行号
NSInteger selRow = [self.pickerView selectedRowInComponent:i];
// 如果行号相等,重新生成
while ((int)selRow == randomNumber) {
randomNumber = arc4random_uniform((int)count);
}
[self.pickerView selectRow:randomNumber inComponent:i animated:YES];
// 2.让label改变
[self pickerView:self.pickerView didSelectRow:randomNumber inComponent:i];
}
}
#pragma mark - 代理方法
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
// 1.获取选中的数据
NSString *selFood = self.foods[component][row];
// 2.设置给label
if (component == 0) {
self.fruitLbl.text = selFood;
} else if (component ==1) {
self.mainFoodLbl.text = selFood;
} else {
self.drinkLbl.text = selFood;
}
}
// 返回每一行显示的内容
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
// 获取每一组的数据
NSArray *group = self.foods[component];
// 返回每一行显示的内容
return group[row];
}
#pragma mark - 数据源方法
// 返回有多少列"组"
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return self.foods.count;
}
// 返回每一组有多少行
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
// 获取每一组的所有数据的数组
NSArray *group = self.foods[component];
// 返回行数
return group.count;
}
#pragma mark - 懒加载
- (NSArray *)foods {
if (_foods == nil) {
// 1.找到文件路径
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"01foods.plist" ofType:nil];
// 2.转为数组
_foods = [NSArray arrayWithContentsOfFile:filePath];
}
return _foods;
}
@end
#import "ViewController.h"
#import "LBProvince.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)LBProvince *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:0inComponent: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:1animated: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 = [pickerView selectedRowInComponent:0];
NSInteger selCityIdx = [pickerView selectedRowInComponent: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];
return self.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) {
return self.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 = [pickerView selectedRowInComponent: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;
return self.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;
}
#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:0inComponent: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:1animated: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
}
//-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{
UILabel *lbl=[[UILabel alloc]initWithFrame:CGRectMake(20, 0, WIDTH/3,30)];
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 lbl;
}
// 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;
}
@end
//解析plist文件
-(void)parsePlistFile{
NSString *path=[[NSBundlemainBundle]pathForResource:@"area.plist"ofType:nil];
NSArray *arr=[NSArrayarrayWithContentsOfFile:path];
self.arr=arr;
NSLog(@"plist---arr---%@",arr);
NSArray *modalArr=[LYHomeProvinceModalobjectArrayWithFilename:@"area.plist"];//字典转模型
self.provinceArr=modalArr;
}
UIPickerView *pickview=[[UIPickerViewalloc]initWithFrame:CGRectMake(0,HEIGHT/2,WIDTH,HEIGHT/2)];
pickview.backgroundColor=[UIColorcolorWithWhite:0.9alpha:1];
[self.viewaddSubview:pickview];
pickview.delegate=self;
pickview.dataSource=self;
self.pickview=pickview;
#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:1animated: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:2animated: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:2animated: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;
}elseif(component==1){
LYHomeProvinceModal *provinceModal=self.provinceModal;
LYHomeCityModal *citymodal=provinceModal.cities[row];
return citymodal.city;
}elseif(component==2){
LYHomeCityModal *citymodal=self.citymodal;
return citymodal.areas[row];
}
return@"安徽";
}
#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;
}