UIAlertView1.m

- (void)onLogout {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"離開程式"
                                                    message:@"請確定是否離開程式"
                                                    delegate:self
                                                    cancelButtonTitle:@"取消"
                                                    otherButtonTitles:@"是的", nil];
    [alert show];
}