［iPhone开发之控件的使用］UIActionSheet的各种属性、方法及代理的使用

 #import "ActionSheetTestViewController.h"
 @implementation ActionSheetTestViewController
 /*
 Tasks

 Creating Action Sheets
     �C initWithTitle:delegate:cancelButtonTitle:destructiveButtonTitle:otherButtonTitles:
     Setting Properties
     delegate  property
     title  property
     visible  property
     actionSheetStyle  property  无例
 Configuring Buttons
     �C addButtonWithTitle:
     numberOfButtons  property
     �C buttonTitleAtIndex:
     cancelButtonIndex  property
     destructiveButtonIndex  property
     firstOtherButtonIndex  property
 Displaying
     �C showFromTabBar:
     �C showFromToolbar:
     �C showInView:
 Dismissing
     �C dismissWithClickedButtonIndex:animated:
 */

 // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
 - (void)viewDidLoad {
     UILabel *numOfBtn = [[UILabel alloc]initWithFrame:CGRectMake(10.0, 10.0, 30.0, 30.0)];
     UILabel *titleOfBtn = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 10.0, 100.0, 30.0)];
     UILabel *cancelBtnIndex = [[UILabel alloc]initWithFrame:CGRectMake(200.0, 10.0, 30.0, 30.0)];
     UILabel *destructiveBtnIndex = [[UILabel alloc]initWithFrame:CGRectMake(10.0, 50.0, 30.0, 30.0)];
     UILabel *firstOtherBtnIndex = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 50.0, 30.0, 30.0)];
     UIActionSheet *actionSheetTest = [[UIActionSheet alloc]initWithTitle:@"ActionSheetTest"
                                 delegate:self
                                 cancelButtonTitle:@"CancelButton"
                                 destructiveButtonTitle:@"RedButton"
                                 otherButtonTitles:@"OtherButton1",@"OtherButton2",nil];
     //看actionSheet是否可见，这是一个只读属性
     BOOL a = actionSheetTest.visible;
     NSLog(@"%d",a);

     //不考虑指定索引的按钮的动作，可以设置是否有动画
     [actionSheetTest dismissWithClickedButtonIndex:0 animated:NO];

     //设置标题
     actionSheetTest.title = @"ActionSheetTitle";

     //通过给定标题添加按钮
     [actionSheetTest addButtonWithTitle:@"addButtonWithTitle"];

     //按钮总数
     numOfBtn.text = [NSString stringWithFormat:@"%d",actionSheetTest.numberOfButtons];

     //获取指定索引的标题
     titleOfBtn.text = [actionSheetTest buttonTitleAtIndex:4];

     //获取取消按钮的索引
     cancelBtnIndex.text = [NSString stringWithFormat:@"%d",actionSheetTest.cancelButtonIndex];

     //获取红色按钮的索引
     destructiveBtnIndex.text = [NSString stringWithFormat:@"%d",actionSheetTest.destructiveButtonIndex];

     //获取第一个其他按钮的索引
     firstOtherBtnIndex.text = [NSString stringWithFormat:@"%d",actionSheetTest.firstOtherButtonIndex];

     //设置actionSheet出现的方式
     [actionSheetTest showInView:self.view];//or [actionSheetTest showFromTabBar:] or [actionSheetTest showFromToolBar:]

     [self.view addSubview:numOfBtn];
     [self.view addSubview:titleOfBtn];
     [self.view addSubview:cancelBtnIndex];
     [self.view addSubview:destructiveBtnIndex];
     [self.view addSubview:firstOtherBtnIndex];

     [actionSheetTest release];
     [numOfBtn release];
     [titleOfBtn release];
     [cancelBtnIndex release];
     [destructiveBtnIndex release];
     [firstOtherBtnIndex release];

     [super viewDidLoad];
 }

 /*
 // Override to allow orientations other than the default portrait orientation.
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
     // Return YES for supported orientations
     return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }
 */
 - (void)didReceiveMemoryWarning {
     // Releases the view if it doesn't have a superview.
     [super didReceiveMemoryWarning];

     // Release any cached data, images, etc that aren't in use.
 }
 - (void)viewDidUnload {
     // Release any retained subviews of the main view.
     // e.g. self.myOutlet = nil;
 }

 - (void)dealloc {
     [super dealloc];
 }

 #pragma mark -- UIActionSheetDelegate --
 //根据被点击按钮的索引处理点击事件
 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
     NSLog(@"clickedButtonAtIndex:%d",buttonIndex);
 }
 //ActionSheet已经消失时
 - (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
     NSLog(@"didDismissWithButtonIndex:%d",buttonIndex);
 }
 //ActionSheet即将消失时
 - (void)actionSheet:(UIActionSheet *)actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex {
     NSLog(@"willDismissWithButtonIndex:%d",buttonIndex);
 }
 //
 - (void)actionSheetCancel:(UIActionSheet *)actionSheet {
     NSLog(@"actionSheetCancel");

 }
 //ActionSheet已经显示时
 - (void)didPresentActionSheet:(UIActionSheet *)actionSheet {
     NSLog(@"didPresentActionSheet%@",actionSheet);
 }
 //ActionSheet即将显示时
 - (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
     NSLog(@"willPresentActionSheet%@",actionSheet);
 }

 @end