iPhone 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