iPhone开发UIAlertView属性及使用方法

 @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:  无例
 */

 // 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];
     //设置标题与信息，通常在使用frame初始化AlertView时使用
     alert.title = @"AlertViewTitle";
     alert.message = @"AlertViewMessage";

     //这个属性继承自UIView，当一个视图中有多个AlertView时，可以用这个属性来区分
     alert.tag = 0;

     //只读属性，看AlertView是否可见
     NSLog(@"%d",alert.visible);

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

     //按钮总数
     NSLog(@"numberOfButtons:%d",alert.numberOfButtons);

     //获取指定索引的按钮的标题
     NSLog(@"buttonTitleAtIndex:%@",[alert buttonTitleAtIndex:2]);

     //获得取消按钮的索引
     NSLog(@"cancelButtonIndex:%d",alert.cancelButtonIndex);

     //获得第一个其他按钮的索引
     NSLog(@"firstOtherButtonIndex:%d",alert.firstOtherButtonIndex);

     //显示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 --
 //根据被点击按钮的索引处理点击事件
 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
     NSLog(@"clickedButtonAtIndex:%d",buttonIndex);
 }
 //AlertView已经消失时
 - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
     NSLog(@"didDismissWithButtonIndex");
 }
 //AlertView即将消失时
 - (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex {
     NSLog(@"willDismissWithButtonIndex");
 }

 - (void)alertViewCancel:(UIAlertView *)alertView {
     NSLog(@"alertViewCancel");
 }
 //AlertView已经显示时
 - (void)didPresentAlertView:(UIAlertView *)alertView {
     NSLog(@"didPresentAlertView");
 }
 //AlertView即将显示时
 - (void)willPresentAlertView:(UIAlertView *)alertView {
     NSLog(@"willPresentAlertView");
 }
 @end