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