alertView

    // 下面弹出
    UIActionSheet *popup = [[UIActionSheet alloc] initWithTitle:nil delegate:cell cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
    [popup addButtonWithTitle:str];
    [popup addButtonWithTitle:kTextCancel];
    [popup setCancelButtonIndex:buttonTitles.count];
    [popup showInView:[UIApplication sharedApplication].keyWindow];

NSString *buttonTitle = [popup buttonTitleAtIndex:buttonIndex];
// 查看点击的是哪个button

// 从中间出来
UIAlertView *editNameAlertView = [[UIAlertView alloc] initWithTitle:@"Edit album name" message:kTextNewAlbumMessage delegate:self cancelButtonTitle:kTextCancel otherButtonTitles:kTextSave,nil];
    editNameAlertView.delegate = self;
    editNameAlertView.alertViewStyle = UIAlertViewStylePlainTextInput;
    [editNameAlertView textFieldAtIndex:0].placeholder = kTextTitle;
    [editNameAlertView textFieldAtIndex:0].text = self.label.text;
    [editNameAlertView textFieldAtIndex:0].autocapitalizationType = UITextAutocapitalizationTypeSentences;