UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"这是一个警告框" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];[alert show];

UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"这是一个警告框" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"button1", @"button2", @"button3", @"button4", @"button5", nil];    [alert show];

添加一个按钮，返回的是此按钮的索引值- (NSInteger)addButtonWithTitle:(NSString *)title;   返回根据按钮索引按钮标题 - (NSString *)buttonTitleAtIndex:(NSInteger)buttonIndex;获取按钮数量@property(nonatomic,readonly) NSInteger numberOfButtons;设置将某一个按钮设置为取消按钮@property(nonatomic) NSInteger cancelButtonIndex;返回其他类型按钮第一个的索引值@property(nonatomic,readonly) NSInteger firstOtherButtonIndex;警告框是否可见@property(nonatomic,readonly,getter=isVisible) BOOL visible;显现警告框- (void)show;代码模拟点击按钮消失触发方法- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated;设置警告框风格@property(nonatomic,assign) UIAlertViewStyle alertViewStyle;风格的枚举如下：typedef NS_ENUM(NSInteger, UIAlertViewStyle) {    UIAlertViewStyleDefault = 0,//默认风格    UIAlertViewStyleSecureTextInput,//密码输入框风格    UIAlertViewStylePlainTextInput,//普通输入框风格    UIAlertViewStyleLoginAndPasswordInput//账号密码框风格};这个方法设置文本输入框的索引- (UITextField *)textFieldAtIndex:(NSInteger)textFieldIndex;UIAlertViewDelegate的方法点击按钮时触发的方法- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;将要展现警告框时触发的方法- (void)willPresentAlertView:(UIAlertView *)alertView;已经展现警告框时触发的方法- (void)didPresentAlertView:(UIAlertView *)alertView;警告框将要消失时触发的方法- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex;警告框已经消失时触发的方法- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex; 设置是否允许第一个按钮不是取消按钮- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView;