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
[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
// 1.让pickerView随机选中
// 生成随机数
// 第i组对应的范围

// 1011 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 ()




@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;
}

=================省市二级联动---------------=
#import "ViewController.h"
#import "CZProvince.h"


@interface ViewController ()




@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


===============省市区三级联动============ iOS UIPickView的使用(二)
文章图片




//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;
【iOS UIPickView的使用(二)】}



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