实现的功能：1）打开ActionSheet后展示PickerView，进行选择操作。
关键词：ActionSheet PickerView
1、新建一个Sigle View Application，命名为PickerInActionSheet，工程结构如下：
[img]
[/img]
2、修改ViewController.xib，添加一个TextField控件。
3、修改ViewController.h，如下：
#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UIPickerViewDelegate,UIPickerViewDataSource>@property(retain,nonatomic)UIPickerView *picker;@property(retain,nonatomic)UIActionSheet *actionSheet;@property(retain,nonatomic)IBOutlet UITextField *textField;@property(nonatomic,retain)NSDictionary *appleDevices; @property(nonatomic,retain)NSArray *deviceCategory; @property(nonatomic,retain)NSArray *deviceName; -(IBAction)showActionSheet:(id)sender;@end
连接输出口textField及操作showActionSheet，如下：
[img]
[/img]
4、修改ViewController.m，如下：
#import "ViewController.h"#define kDeviceCategory 0 #define kDeviceName 1 @interface ViewController ()@end@implementation ViewController@synthesize appleDevices; @synthesize deviceCategory; @synthesize deviceName; @synthesize picker;@synthesize actionSheet;@synthesize textField;- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. [self initData];}//初始化数据-(void)initData{ textField.placeholder = @"请点击。。。"; textField.textAlignment = UITextAlignmentCenter; NSArray *array1 = [NSArray arrayWithObjects:@"iPhone",@"iPad",@"iPod",nil]; NSArray *array2 = [NSArray arrayWithObjects:@"Mac",@"iMac",@"Mac Mini",@"Mac Pro",nil]; NSDictionary *dictionary= [NSDictionary dictionaryWithObjectsAndKeys:array1,@"Mobile",array2,@"Computers",nil]; appleDevices = [[NSDictionary alloc]initWithDictionary:dictionary copyItems:YES]; NSArray *components = [self.appleDevices allKeys]; NSArray *sorted = [components sortedArrayUsingSelector:@selector(compare:)]; self.deviceCategory = sorted; NSString *selectedCategory = [self.deviceCategory objectAtIndex:0]; self.deviceName = [self.appleDevices objectForKey:selectedCategory]; }//初始化视图-(void)showActionSheetPicker{ //在title中加入多个换行，给picker留出空间，否则picker会盖住ActionSheet的button NSString *title = @"请选择设备\n\n\n\n\n\n\n\n\n\n\n\n\n\n"; actionSheet = [[UIActionSheet alloc] initWithTitle:title delegate:nil cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:nil,nil]; picker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 50, 320, 220)]; picker.delegate = self; picker.dataSource = self; picker.showsSelectionIndicator = YES; [actionSheet addSubview:picker]; [actionSheet showInView:self.view];}-(void)dealloc{ self.deviceName = nil; self.deviceCategory = nil; self.appleDevices = nil; self.picker = nil;}- (void)viewDidUnload{ [super viewDidUnload]; // Release any retained subviews of the main view.}//显示actionSheet-(IBAction)showActionSheet:(id)sender{ [self showActionSheetPicker];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ //强制用竖屏模式 return UIInterfaceOrientationIsPortrait(interfaceOrientation);}#pragma mark Picker Data Source Methods- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 2;}- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ if(component == kDeviceCategory){ return [self.deviceCategory count]; }else{ return [self.deviceName count]; } }- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if(component == kDeviceCategory){ return [self.deviceCategory objectAtIndex:row]; }else{ return [self.deviceName objectAtIndex:row]; } }- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{ if(component==kDeviceCategory){ return 150; }else{ return 170; }}- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{ return 35;}//显示picker中的数据-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ NSString *inputString; if(component == kDeviceCategory){ NSString *selectedCategory = [self.deviceCategory objectAtIndex:row]; NSArray *array = [self.appleDevices objectForKey:selectedCategory]; self.deviceName = array; [self.picker selectRow:0 inComponent:kDeviceName animated:YES]; [self.picker reloadComponent:kDeviceName]; inputString = selectedCategory; }else if(component == kDeviceName){ NSUInteger selectedCategoryRow = [pickerView selectedRowInComponent:kDeviceCategory]; NSString *selectedCategory = [self.deviceCategory objectAtIndex:selectedCategoryRow]; inputString = [NSString stringWithFormat:@"%@-%@",selectedCategory,[self.deviceName objectAtIndex:row]]; } //给文本框设置值 self.textField.text=inputString;} - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; }@end5、运行效果如下：
[img]
[/img]
[img]
[/img]