//
// ViewController.m
// UIPickerView
//
// Created by City--Online on 15/5/18.
// Copyright (c) 2015年 XQB. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>
@property(nonatomic,strong) UIPickerView *pickerView;
@property(nonatomic,strong) NSMutableArray *provinceArr;
@property(nonatomic,strong) NSMutableArray *cityArr; //省份对应下的城市及显示的城市
@property(nonatomic,strong) NSDictionary *dicData;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_pickerView=[[UIPickerView alloc]init];
CGSize size=[UIScreen mainScreen].bounds.size;
_pickerView.frame=CGRectMake(10, 10, size.width, 100);
_pickerView.showsSelectionIndicator=YES;
_pickerView.dataSource=self;
_pickerView.delegate=self;
[self.view addSubview:_pickerView];
_provinceArr=[[NSMutableArray alloc]initWithObjects:@"河南",@"广东", nil];
NSArray *arr1=[[NSArray alloc]initWithObjects:@"----",@"驻马店",@"周口",nil];
NSArray *arr2=[[NSArray alloc]initWithObjects:@"----",@"深圳",@"广州",@"东莞", nil];
_dicData=[[NSDictionary alloc]initWithObjects:[[NSArray alloc] initWithObjects:arr1,arr2, nil] forKeys:_provinceArr];
//找到第一个轮子选择行的索引
NSInteger selectProvinceIndex=[_pickerView selectedRowInComponent:0];
//根据索引找到对应的省份
NSString *province=[[_dicData allKeys]objectAtIndex:selectProvinceIndex];
//根据省份找到对应的城市
_cityArr=[[NSMutableArray alloc]init];
_cityArr=[_dicData objectForKey:province];
NSLog(@"%@",_dicData);
}
//UIPickerViewDataSource
//列个数
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
NSLog(@"allKeys=%ld",[_dicData allKeys].count);
return _provinceArr.count;
}
//行个数
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component==0) {
return _provinceArr.count;
}
else
{
return _cityArr.count;
}
}
//UIPickerViewDelegate
//每列宽度
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
return _pickerView.frame.size.width/2;
}
//每列中行的宽度
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
if (component==0) {
return 50;
}
return 30;
}
//填充每行内容
//- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
//{
// if (component==0) {
// return [_provinceArr objectAtIndex:row];
// }
// else{
// return [_cityArr objectAtIndex:row];
// }
//}
//为没行设置文本设置属性
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *str=[[NSString alloc]init];
if (component==0) {
str=[_provinceArr objectAtIndex:row];
}
else{
str=[_cityArr objectAtIndex:row];
}
NSMutableAttributedString *attributedString=[[NSMutableAttributedString alloc]initWithString:str];
UIFont *font = [UIFont systemFontOfSize:10];
[attributedString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, str.length)];
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, str.length)];
return attributedString;
}
//当picker view需要给指定的component.row指定view时,调用此函数.返回值为用作row内容的view 可以自定义View
//- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
//{
// UILabel *label=[[UILabel alloc]init];
// label.text=@"text";
// label.backgroundColor=[UIColor redColor];
// return label;
//
//}
//选中某一轮子的某一列
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (component==0) {
NSString *selectProvince=[_provinceArr objectAtIndex:row];
_cityArr=[_dicData objectForKey:selectProvince];
//重新加载某一个轮子
[_pickerView reloadComponent:1];
//选中轮子的某一行
[_pickerView selectRow:0 inComponent:1 animated:YES];
}
else
{
if (row==0) {
return;
}
NSInteger selectProvinceIndex=[_pickerView selectedRowInComponent:0];
NSString *province=[_provinceArr objectAtIndex:selectProvinceIndex];
NSString *city=[_cityArr objectAtIndex:row];
NSLog(@"%@-----%@",province,city);
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
时间: 2024-11-03 17:54:10