在iPhone中用开关ON/OFF隐藏表格查看单元格

Question

对于您的专家来说,这可能是一个简单的问题,但我无法找出正确的解决方案.

在我的应用程序中,我创建了一个表视图来列出一个项目.

在单元格的第一行有一个switch(ON/OFF).

因此我的客户端需要在切换时隐藏底部单元格(除了第零个单元格)并在切换时OFF显示所有单元格ON.

我通过代码创建了切换.

任何人都可以帮我解决这个问题吗？

提前致谢.

Answer 1

numberOfRows dataSource方法 - 使其返回1和reloadTableView

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  /// ....
            self.switchView = [[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
            cell.accessoryView = self.switchView;
            [self.switchView setOn:NO animated:NO];
            [self.switchView addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventValueChanged];

//....

}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
   if [self.switchView.on]
       return 1;
   else 
   {
      // normal code return
   }
}

- (void) switchChanged:(id)sender {
     [self.tableView reloadData];
} 

Answer 2

您可以使用insertRowsAtIndexPaths,这不仅会添加,还会添加新行的动画

首先将目标添加UIControlEventTouchUpInside到UISwitch.

[switch addTarget:self action:@selector(switchChange:) forControlEvents:UIControlEventValueChanged];

- (void)switchChange :( UISwitch*)sender {

       isSwitchOn = sender.on; //edited
    [myTable beginUpdates];
    NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
    NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
    //you may add as many row as you want here.

    [myTable insertRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil] withRowAnimation:UITableViewRowAnimationMiddle];
    [myTable endUpdates];

}

并确保您将添加要插入的行数 numberOfRowsInSection:

• (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section {

  if(isSwitchOn)返回1;

  否则返回3; //打开后会有多少行

}

您可能需要检查[myTable insertSections:withRowAnimation:以插入另一个部分并执行与上面相同的操作.但要记住要说明你要添加多少部分numberOfSectionsInTableView:

更新:

deleteRowsAtIndexPaths:如果关闭则执行.

- (void)switchChange :( UISwitch*)sender {

    isSwitchOn = sender.on;

  if(isSwitchOn){
        [myTable beginUpdates];
         NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
         NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
         //you may add as many row as you want here.

        [myTable insertRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil]  withRowAnimation:UITableViewRowAnimationMiddle];
        [myTable endUpdates];
    }
  else{
        [myTable beginUpdates];
         NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
         NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
         //you may add as many row as you want here.

        [myTable deleteRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil]  withRowAnimation:UITableViewRowAnimationFade];
        [myTable endUpdates]; 
 }

}