IOS pickerView 使用

源码下载

选择器，如同html select 一个pickerView可以实现多个select 关键是由numberOfComponentsInPickerView 这个决定有多少个列

实现委托和数据源。

实现下面三个方法

// returns the number of 'columns' to display. //总共有多少列

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

return 2;

}

// returns the # of rows in each component.. //列的数据

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

if(component==0){

return [array1 count];

}else{;

return [array2 count];

}

//设置当前内容

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

if(component==0){

return [array1 objectAtIndex:row];

}else{

return [array2 objectAtIndex:row];

}

实现效果：

获取选择到的数据

联动效果

需要定义一个字典类型。相当于java Map类型

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

NSLog(@"DDDDD");

mainArray = [NSArray arrayWithObjects:@"test1",@"test2",nil];

myds = [NSDictionary dictionaryWithObjectsAndKeys:[NSArray arrayWithObjects:@"test11",@"test12", nil],@"test1",

[NSArray arrayWithObjects:@"test21",@"test22", nil],@"test2", nil];

subArray = [myds objectForKey:@"test1"];

_pick4.delegate=self;

_pick4.dataSource=self;

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

// returns the number of 'columns' to display.

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

return 2;

}

// returns the # of rows in each component..

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

if(component==0){

return [mainArray count];

}else{;

return [subArray count];

}

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

if(component==0){

return [mainArray objectAtIndex:row];

}else{

return [subArray objectAtIndex:row];

}

//选择相应列表的时候

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

if(component==0){

subArray = [myds objectForKey:[mainArray objectAtIndex:row]];

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

[pickerView reloadComponent:1 ];

}

//实现读取内容

- (IBAction)button4click:(id)sender {

_text4.text = @"DDDD";

NSInteger ar1 = [_pick4 selectedRowInComponent:0];

NSInteger ar2 = [_pick4 selectedRowInComponent:1];

NSString *str1 = [mainArray objectAtIndex:ar1];

NSString *str2 = [subArray objectAtIndex:ar2];

NSString *message = [ str1 stringByAppendingFormat:@"---%@",str2 ];

_text4.text = message;

}

IOS pickerView 使用相关推荐

iOS pickerView（所有类型一网打尽）
概述关于PickView的所有类型都在这里详细代码下载:http://www.demodashi.com/demo/11017.html 首先看下项目的整体结构: 一.准备工作 UIPicker ...
ios pickerview选择城市
// // ViewController.m // 02-城市选中 // // Created by panba on 16-4-12. // Copyright (c) 2016年 panba. A ...
安卓开源项目周报1220
由OpenDigg 出品的安卓开源项目周报第二期来啦.我们的安卓开源周报集合了OpenDigg一周来新收录的优质的安卓开发方面的开源项目,方便安卓开发人员便捷的找到自己需要的项目工具等. androi ...
最全android Demo
1.BeautifulRefreshLayout-漂亮的美食下拉刷新 https://github.com/android-cjj/BeautifulRefreshLayout/tree/Beauti ...
140款Android开源优秀项目源码
140款Android开源优秀项目源码 BeautifulRefreshLayout-漂亮的美食下拉刷新 https://github.com/android-cjj/BeautifulRefresh ...
GitHub 上受欢迎的 Android UI Library 整理（一）
内容较多,可以用 ctrl+F 来搜索抽屉菜单 https://github.com/mikepenz/MaterialDrawer ★7337 - 安卓抽屉效果实现方案 https://githu ...
Github常用框架集合
Script桥接 https://github.com/JackyAndroid/AndroidChromium ★1476 - 谷歌浏览器安卓版源码项目 https://github.com/The ...
GitHub 上受欢迎的 Android UI Library 整理
抽屉菜单 https://github.com/mikepenz/MaterialDrawer ★7337 - 安卓抽屉效果实现方案 https://github.com/Yalantis/Side- ...
GitHub 上受欢迎的 Android UI Library(part_one)
抽屉菜单 https://github.com/mikepenz/MaterialDrawer ★7337 - 安卓抽屉效果实现方案 https://github.com/Yalantis/Side- ...

IOS pickerView 使用

IOS pickerView 使用相关推荐

最新文章

热门文章