UIAlertView的基本使用
#import "ViewController.h"
//遵守代理
@interface ViewController ()<UIAlertViewDelegate>
@end
@implementationViewController
- (void)viewDidLoad {
[super viewDidLoad];
/**
初始化UIAlertView
*/
UIAlertView *alertview = [[UIAlertView alloc]initWithTitle:@"节日祝福" message:@"新年好,恭喜发财" delegate:self cancelButtonTitle:@"其他" otherButtonTitles:@"确定", nil];
//设置标题信息
alertview.title = @"UIAlertView";
alertview.message = @"UIAlertViewMessage";
//当一个视图有多个UIAlertView 可以用 tag 来区分,这个属性继承自 UIview
alertview.tag = 0;
//只读属性,看alertview是否可见
NSLog(@"%d",alertview.visible);
//通过给定标题添加按钮
[alertview addButtonWithTitle:@"我是一个新加的按钮"];
//按钮总数
NSLog(@"buttonNum:%zd",alertview.numberOfButtons);
//获取指定索引的按钮标题
NSLog(@"buttonIndex1:%zd",[alertview buttonTitleAtIndex:1]);
NSLog(@"buttonIndex2:%zd",[alertview buttonTitleAtIndex:2]);
//获取取消按钮的索引
NSLog(@"cencelButtonIndex:%zd",[alertview cancelButtonIndex]);
//获取第一个其他按钮的索引
NSLog(@"firstOtherButtonIndex:%zd",[alertview firstOtherButtonIndex]);
//显示alertview
//注意UIAlertView调用show显示出来的时候，系统会自动强引用它，不会被释放
[alertview show];
}
#pragma mark----------------------------------------UIAlertView代理方法
//根据被点击按钮的索引会调用此方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
NSLog(@"clickButtonAtIndex:%zd",buttonIndex);
}
//AlertView已经消失时会调用此方法
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"didDismissWithButtonIndex");
}
//ALertView即将消失时会调用此方法
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"willDismissWithButtonIndex");
}
//AlertView的取消按钮会调用此方法
-(void)alertViewCancel:(UIAlertView *)alertView
{
NSLog(@"alertViewCancel");
}
//AlertView已经显示时会调用此方法
-(void)didPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"didPresentAlertView");
}
//AlertView即将显示时会调用此方法
-(void)willPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"willPresentAlertView");
}
@end