IOS UIPickerView控件的关联选择
2012-08-28 10:59
489 查看
IOS UIPickerView控件的关联选择
建立一个和左边的列表key对应的数组,当选择这个key时,刷新左边UIPickerView部分的内容显示对应数组的数据,选择时,找到两个UIPickerView部件rowIndex,找出数据,放到TextField里。
我们要实现的效果如下:
当选择左边的一级选项时,左边展示一级选项里含有的二级选项,选择后显示在TextField里。
如何实现呢?建立一个和左边的列表key对应的数组,当选择这个key时,刷新左边UIPickerView部分的内容显示对应数组的数据,选择时,找到
两个UIPickerView部件rowIndex,找出数据,放到TextField里。
1、打开上篇PickerViewDemo项目,在ViewController.h添加两个成员变量:NSArray *subPickerArray; NSDictionary *dicPicker;
[cpp]view plaincopy
1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController<UIPickerViewDelegate, UITextFieldDelegate,UIPickerViewDataSource>
4 {
5 NSArray *pickerArray;
6 NSArray *subPickerArray;
7 NSDictionary *dicPicker;
8 }
9 - (IBAction)selectButton:(id)sender;
10 @property (strong, nonatomic) IBOutlet UIToolbar *doneToolbar;
11 @property (strong, nonatomic) IBOutlet UIPickerView *selectPicker;
12 @property (strong, nonatomic) IBOutlet UITextField *textField;
13 @end
2、初始化
[cpp]view plaincopy
14 - (void)viewDidLoad
15 {
16 [super viewDidLoad];
17 pickerArray = [NSArray arrayWithObjects:@"动物",@"植物",@"石头", nil];
18 dicPicker = [NSDictionary dictionaryWithObjectsAndKeys:
19 [NSArray arrayWithObjects:@"鱼",@"鸟",@"虫子", nil], @"动物",
20 [NSArray arrayWithObjects:@"花",@"草",@"葵花", nil], @"植物",
21 [NSArray arrayWithObjects:@"疯狂的石头",@"花岗岩",@"鹅卵石", nil], @"石头",nil];
22
23 subPickerArray = [dicPicker objectForKey:@"动物"];
24 textField.inputView = selectPicker;
25 textField.inputAccessoryView = doneToolbar;
26 textField.delegate = self;
27 selectPicker.delegate = self;
28 selectPicker.dataSource = self;
29 selectPicker.frame = CGRectMake(0, 480, 320, 216);
30
31 }
给 NSDictionary *dicPicker;赋值,对应的三个关键字添加了对应的数组。
3、Component返回两个,这样就有两个齿轮了。
[cpp]view plaincopy
32 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
33 return 2;
34 }
4、使用宏
在#import "ViewController.h"下面定义两个宏,代表UIPickerView齿轮的左边的部分和右边的部分。左边的部分是0,右边的是1.
#import "ViewController.h"
#define kFirstComponent 0
#define kSubComponent 1
5、判断是那个齿轮,返回相应的数据的Count。
[cpp]view plaincopy
35 -(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
36 if(component == kFirstComponent){
37 return [pickerArray count];
38 }else {
39 return [subPickerArray count];
40 }
41
42 }
6、根据component返回相应的String数据
[cpp]view plaincopy
43 -(NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
44 if(component == kFirstComponent){
45 return [pickerArray objectAtIndex:row];
46 }else {
47 return [subPickerArray objectAtIndex:row];
48 }
49 }
7、拖动左边的齿轮时,右边的数据相应的Reload更新。
[cpp]view plaincopy
50 -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
51 if (component == kFirstComponent) {
52 subPickerArray = [dicPicker objectForKey:[pickerArray objectAtIndex:row]];
53 [pickerView selectRow:0 inComponent:kSubComponent animated:YES];
54 [pickerView reloadComponent:kSubComponent];
55 }
56 }
8、相应选择的数据,并显示在TextField上。
[cpp]view plaincopy
57 -(void)textFieldDidEndEditing:(UITextField *)textField{
58 NSInteger firstViewRow = [selectPicker selectedRowInComponent:kFirstComponent];
59 NSInteger subViewRow = [selectPicker selectedRowInComponent:kSubComponent];
60 NSString * firstString = [pickerArray objectAtIndex:firstViewRow];
61 NSString * subString = [[dicPicker objectForKey:[pickerArray objectAtIndex:firstViewRow]] objectAtIndex:subViewRow] ;
62 NSString *textString = [[NSString alloc ] initWithFormat:@"您选择了:%@%@%@", firstString, @" 里的 ", subString];
63 self.textField.text = textString;
64 }
65
66 - (IBAction)selectButton:(id)sender {
67 [textField endEditing:YES];
68 }
大功告成,运行,点击TextField,弹出:
建立一个和左边的列表key对应的数组,当选择这个key时,刷新左边UIPickerView部分的内容显示对应数组的数据,选择时,找到两个UIPickerView部件rowIndex,找出数据,放到TextField里。
我们要实现的效果如下:
当选择左边的一级选项时,左边展示一级选项里含有的二级选项,选择后显示在TextField里。
如何实现呢?建立一个和左边的列表key对应的数组,当选择这个key时,刷新左边UIPickerView部分的内容显示对应数组的数据,选择时,找到
两个UIPickerView部件rowIndex,找出数据,放到TextField里。
1、打开上篇PickerViewDemo项目,在ViewController.h添加两个成员变量:NSArray *subPickerArray; NSDictionary *dicPicker;
[cpp]view plaincopy
1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController<UIPickerViewDelegate, UITextFieldDelegate,UIPickerViewDataSource>
4 {
5 NSArray *pickerArray;
6 NSArray *subPickerArray;
7 NSDictionary *dicPicker;
8 }
9 - (IBAction)selectButton:(id)sender;
10 @property (strong, nonatomic) IBOutlet UIToolbar *doneToolbar;
11 @property (strong, nonatomic) IBOutlet UIPickerView *selectPicker;
12 @property (strong, nonatomic) IBOutlet UITextField *textField;
13 @end
2、初始化
[cpp]view plaincopy
14 - (void)viewDidLoad
15 {
16 [super viewDidLoad];
17 pickerArray = [NSArray arrayWithObjects:@"动物",@"植物",@"石头", nil];
18 dicPicker = [NSDictionary dictionaryWithObjectsAndKeys:
19 [NSArray arrayWithObjects:@"鱼",@"鸟",@"虫子", nil], @"动物",
20 [NSArray arrayWithObjects:@"花",@"草",@"葵花", nil], @"植物",
21 [NSArray arrayWithObjects:@"疯狂的石头",@"花岗岩",@"鹅卵石", nil], @"石头",nil];
22
23 subPickerArray = [dicPicker objectForKey:@"动物"];
24 textField.inputView = selectPicker;
25 textField.inputAccessoryView = doneToolbar;
26 textField.delegate = self;
27 selectPicker.delegate = self;
28 selectPicker.dataSource = self;
29 selectPicker.frame = CGRectMake(0, 480, 320, 216);
30
31 }
给 NSDictionary *dicPicker;赋值,对应的三个关键字添加了对应的数组。
3、Component返回两个,这样就有两个齿轮了。
[cpp]view plaincopy
32 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
33 return 2;
34 }
4、使用宏
在#import "ViewController.h"下面定义两个宏,代表UIPickerView齿轮的左边的部分和右边的部分。左边的部分是0,右边的是1.
#import "ViewController.h"
#define kFirstComponent 0
#define kSubComponent 1
5、判断是那个齿轮,返回相应的数据的Count。
[cpp]view plaincopy
35 -(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
36 if(component == kFirstComponent){
37 return [pickerArray count];
38 }else {
39 return [subPickerArray count];
40 }
41
42 }
6、根据component返回相应的String数据
[cpp]view plaincopy
43 -(NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
44 if(component == kFirstComponent){
45 return [pickerArray objectAtIndex:row];
46 }else {
47 return [subPickerArray objectAtIndex:row];
48 }
49 }
7、拖动左边的齿轮时,右边的数据相应的Reload更新。
[cpp]view plaincopy
50 -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
51 if (component == kFirstComponent) {
52 subPickerArray = [dicPicker objectForKey:[pickerArray objectAtIndex:row]];
53 [pickerView selectRow:0 inComponent:kSubComponent animated:YES];
54 [pickerView reloadComponent:kSubComponent];
55 }
56 }
8、相应选择的数据,并显示在TextField上。
[cpp]view plaincopy
57 -(void)textFieldDidEndEditing:(UITextField *)textField{
58 NSInteger firstViewRow = [selectPicker selectedRowInComponent:kFirstComponent];
59 NSInteger subViewRow = [selectPicker selectedRowInComponent:kSubComponent];
60 NSString * firstString = [pickerArray objectAtIndex:firstViewRow];
61 NSString * subString = [[dicPicker objectForKey:[pickerArray objectAtIndex:firstViewRow]] objectAtIndex:subViewRow] ;
62 NSString *textString = [[NSString alloc ] initWithFormat:@"您选择了:%@%@%@", firstString, @" 里的 ", subString];
63 self.textField.text = textString;
64 }
65
66 - (IBAction)selectButton:(id)sender {
67 [textField endEditing:YES];
68 }
大功告成,运行,点击TextField,弹出:
相关文章推荐
- iOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- IOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- iOS学习之UIPickerView控件的关联选择
- UIPickerView 选择控制器----ios控件 UIPickerView应用 制作简易省、市、地区选择器
- iOS App中UIPickerView选择栏控件的使用实例解析
- iOS开发UI篇—UIPickerView控件简单介绍
- [iOS基础控件 - 6.10.2] PickerView 自定义row内容 国家选择Demo
- iOS uipickerview 选择DATE
- iOS学习之UIPickerView控件的简单使用
- iOS开发-数据选择UIPickerView
- iOS中使用UIDocumentPickerViewController从iCloud选择文件
- IOS学习之UIPickerView控件的简单使用
- iOS开发UI篇—UIPickerView控件简单介绍
- iOS学习之UIPickerView控件的简单使用
- iOS开发UI篇—UIPickerView控件简单介绍