iPhone：当用户摇动时修改视图
我正在开发一个 iPhone 应用程序，当用户摇动手机时，它会从表视图中删除行。我创建了一个基于导航的项目。现在，当用户摇动 iPhone 时，我希望导航栏的标题更改为“删除”，并在同一视图中的导航栏上显示删除按钮。否则，当用户选择特定行时，它应该移动到下一个视图。我编写了以下代码，但它不起作用。请帮帮我。
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (isShaked == NO)
{
//logic to move to next view goes here.
}
else
{
self.title = @"Delete Rows";
delete=[[UIBarButtonItem alloc] initWithTitle:@"Delete rows" style:
UIBarButtonItemStyleBordered target:self action:@selector(deleteItemsSelected)] ;
self.navigationItem.rightBarButtonItem=self.delete;
MyTableCell *targetCustomCell = (MyTableCell *)[tableView cellForRowAtIndexPath:indexPath];
[targetCustomCell checkAction];
[self.tempArray addObject: [myModal.listOfStates objectAtIndex:indexPath.row]];
//[delete addTarget:self action:@selector(deleteItemsSelected:) forControlEvents:UIControlEventTouchUpInside];
self.tempTableView = tableView;
}
}
-(void)deleteItemsSelected
{
[myModal.listOfStates removeObjectsInArray:tempArray];
[tempTableView reloadData];
}
checkAction 方法是一种自定义单元格方法，用于在所选行上放置刻度线。
I am developing an iPhone application which deletes rows from a table view when the user shakes the phone. I have created a navigation-based project. Now when the user shakes the iPhone I want the title of the navigation bar to change to "DELETE" and a delete button to appear on the navigation bar, in the same view. Otherwise, when a user selects a particular row it should move to the next view. I have written the following code but it's not working. Please help me out.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (isShaked == NO)
{
//logic to move to next view goes here.
}
else
{
self.title = @"Delete Rows";
delete=[[UIBarButtonItem alloc] initWithTitle:@"Delete rows" style:
UIBarButtonItemStyleBordered target:self action:@selector(deleteItemsSelected)] ;
self.navigationItem.rightBarButtonItem=self.delete;
MyTableCell *targetCustomCell = (MyTableCell *)[tableView cellForRowAtIndexPath:indexPath];
[targetCustomCell checkAction];
[self.tempArray addObject: [myModal.listOfStates objectAtIndex:indexPath.row]];
//[delete addTarget:self action:@selector(deleteItemsSelected:) forControlEvents:UIControlEventTouchUpInside];
self.tempTableView = tableView;
}
}
-(void)deleteItemsSelected
{
[myModal.listOfStates removeObjectsInArray:tempArray];
[tempTableView reloadData];
}
checkAction method is a custom cell method which is used to put a tickmark on the row selected.
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为了让您检查手机是否被摇晃，您的类必须使用 UIAccelerometerDelegate 协议。
例如：
然后，您需要能够判断手机何时被摇动（我在 viewDidLoad 中使用它）：
一旦用户摇动手机，您就可以用这种方法施展魔法：
您显然可以更改检查的时间间隔更频繁地更改加速度计上的参数：didAccelerate 方法以满足您的需求。
In order for you to check if the phone's been shaken, your class will have to use the UIAccelerometerDelegate protocol.
For example:
Then, you need to be able to tell when the phone's been shaken (I use this in my viewDidLoad):
Once the user shakes the phone, you can do your magic in this method:
You can obviously change the interval to check more often and change the parameters on the accelerometer:didAccelerate method to suit your needs.
检查这些方法/API：
这些是为动作识别提供的事件处理程序。使用这些之前请先阅读文档。
Check these methods/APIs:
These are event handlers provided for motion recognition. Go through the document before using these.