iPhone UIAlertView屬性及使用方法

@implementation AlertViewTestViewController    /*  Tasks    Creating Alert Views     – initWithTitle:message:delegate:cancelButtonTitle:otherButtonTitles:    Setting Properties     delegate  property       title  property       message  property       visible  property    Configuring Buttons     – addButtonWithTitle:       numberOfButtons  property       – buttonTitleAtIndex:       cancelButtonIndex  property       firstOtherButtonIndex  property    Displaying     – show    Dismissing     – dismissWithClickedButtonIndex:animated:  無例 */    // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.  - (void)viewDidLoad {      //初始化AlertView      UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"AlertViewTest"                               message:@"message"                               delegate:self                               cancelButtonTitle:@"Cancel"                               otherButtonTitles:@"OtherBtn",nil];      //設定標題與資訊，通常在使用frame初始化AlertView時使用      alert.title = @"AlertViewTitle";      alert.message = @"AlertViewMessage";            //這個屬性繼承自UIView，當一個視圖中有多個AlertView時，可以用這個屬性來區分      alert.tag = 0;            //唯讀屬性，看AlertView是否可見      NSLog(@"%d",alert.visible);            //通過給定標題添加按鈕      [alert addButtonWithTitle:@"addButton"];            //按鈕總數      NSLog(@"numberOfButtons:%d",alert.numberOfButtons);            //擷取指定索引的按鈕的標題      NSLog(@"buttonTitleAtIndex:%@",[alert buttonTitleAtIndex:2]);            //獲得取消按鈕的索引      NSLog(@"cancelButtonIndex:%d",alert.cancelButtonIndex);            //獲得第一個其他按鈕的索引      NSLog(@"firstOtherButtonIndex:%d",alert.firstOtherButtonIndex);            //顯示AlertView      [alert show];            [alert 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  -- UIAlertViewDelegate --  //根據被點擊按鈕的索引處理點擊事件  - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {      NSLog(@"clickedButtonAtIndex:%d",buttonIndex);  }  //AlertView已經消失時  - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {      NSLog(@"didDismissWithButtonIndex");  }  //AlertView即將消失時  - (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex {      NSLog(@"willDismissWithButtonIndex");  }    - (void)alertViewCancel:(UIAlertView *)alertView {      NSLog(@"alertViewCancel");  }  //AlertView已經顯示時  - (void)didPresentAlertView:(UIAlertView *)alertView {      NSLog(@"didPresentAlertView");  }  //AlertView即將顯示時  - (void)willPresentAlertView:(UIAlertView *)alertView {      NSLog(@"willPresentAlertView");  }  @end