随波逐流之iOS AlertView(弹出框)详解

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];

UIButton *a = [UIButton buttonWithType:UIButtonTypeSystem];
a.frame = CGRectMake(100, 100, 30, 30);
a.tag = 100;
[a setTitle:@"开始" forState:UIControlStateNormal];
[a addTarget:self action:@selector(a1:) forControlEvents:UIControlEventTouchUpInside];
[self.window addSubview:a];

return YES;
}

- (void)a1:(UIButton *)a
{
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(@"number Of Buttons :%ld",alert.numberOfButtons);
//获取指定索引的按钮标题
NSLog(@"buttonTitleAtIndex1:%@",[alert buttonTitleAtIndex:1]);
//    NSLog(@"buttonTitleAtIndex2:%@",[alert buttonTitleAtIndex:2]);
//获取取消按钮的索引
NSLog(@"cancelButtonIndex:%ld",alert.cancelButtonIndex);
//获取第一个其他按钮的索引
NSLog(@"firstOtherButtonIndex:%ld",alert.firstOtherButtonIndex);
//显示AlertView
[alert show];
[alert release];
}

#pragma marks -- 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(@"clickButtonAtIndex:%ld",buttonIndex);
}

//AlertView已经消失时执行的事件
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"didDismissWithButtonIndex");
}

//ALertView即将消失时的事件
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"willDismissWithButtonIndex");
}

//AlertView已经显示时的事件
-(void)didPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"didPresentAlertView");
}

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