在删除UITableView单元格之前发出警报 – (UIAlertController)Swift或Objective-C

概述我想删除一个表视图单元格,但在该 *** 作发生之前,我想给用户一个警报视图.我懂了： - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (edi 我想删除一个表视图单元格,但在该 *** 作发生之前,我想给用户一个警报视图.我懂了：

- (voID)tableVIEw:(UItableVIEw *)tableVIEw commitEditingStyle:(UItableVIEwCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {    if (editingStyle == UItableVIEwCellEditingStyleDelete) {        UIAlertVIEw *alert = [[UIAlertVIEw alloc] initWithTitle:@"Warning"                                                        message:@"Are you sure?"                                                       delegate:self                                              cancelbuttonTitle:@"NO"                                              otherbuttonTitles:@"YES",nil];        [alert show];        [self.array removeObjectAtIndex:indexPath.row];//or something similar to this based on your data source array structure        [tableVIEw deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UItableVIEwRowAnimationFade];    }}- (voID)alertVIEw:(UIAlertVIEw *)alertVIEw clickedbuttonAtIndex:(NSInteger)buttonIndex{    Nsstring *Title = [alertVIEw buttonTitleAtIndex:buttonIndex];    if([Title isEqualToString:@"Nee"])    {        NSLog(@"nothing to do here");    }    else if([Title isEqualToString:@"Ja"])    {        NSLog(@"Delete the cell");    }}

但是现在当我在单元格上向右滑动并且删除按钮出现时,我没有AlertVIEw.当我按下删除按钮时,我只获得AlertVIEw.当我按下删除按钮时,会出现消息,但单元格已被删除.

如何使这项工作？所以当我滑动时有一个AlertVIEw.

关于序列,一切都很好.只有在按下删除按钮时才会调用commitEditingStyle.关键是你实际上在响应警报之前删除了对象.把它改成这个：

在@implementation之前将其添加到.m文件中：

@interface PutYourVIEwControllerClassnameHere@property (strong,nonatomic) NSIndexPath *indexPathTobedeleted;@end

然后：

- (voID)tableVIEw:(UItableVIEw *)tableVIEw commitEditingStyle:(UItableVIEwCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {    if (editingStyle == UItableVIEwCellEditingStyleDelete) {        self.indexPathTobedeleted = indexPath;        UIAlertVIEw *alert = [[UIAlertVIEw alloc] initWithTitle:@"Warning"                                                        message:@"Are you sure?"                                                       delegate:self                                              cancelbuttonTitle:@"NO"                                              otherbuttonTitles:@"YES",nil];        [alert show];        // do not delete it here. So far the alter has not even been shown yet. It will not been shown to the user before this current method is finished.         }}- (voID)alertVIEw:(UIAlertVIEw *)alertVIEw clickedbuttonAtIndex:(NSInteger)buttonIndex{    // This method is invoked in response to the user's action. The altert vIEw is about to disappear (or has been disappeard already - I am not sure)     Nsstring *Title = [alertVIEw buttonTitleAtIndex:buttonIndex];    if([Title isEqualToString:@"NO"])    {        NSLog(@"nothing to do here");    }    else if([Title isEqualToString:@"YES"])    {        NSLog(@"Delete the cell");        [self.array removeObjectAtIndex:[self.indexPathTobedeleted row]];        [self.tableVIEw deleteRowsAtIndexPaths:[NSArray arrayWithObject:self.indexPathTobedeleted] withRowAnimation:UItableVIEwRowAnimationFade];    }}

编辑：这应该编译,尽管可能有轻微的语法错误.一般说法：您只处理一个部分.至少只有删除内的一个部分是可能的.

总结

以上是内存溢出为你收集整理的在删除UITableView单元格之前发出警报 – (UIAlertController)Swift或Objective-C全部内容，希望文章能够帮你解决在删除UITableView单元格之前发出警报 – (UIAlertController)Swift或Objective-C所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。