如何使用objective-c使用栏按钮项从文档目录中删除文件？

I create a Bar button item (trash can) using storyboard.App crashes when i try to delete a file from document directory on button action. Here is code so far:

我使用storyboard.App创建了一个Bar按钮项（垃圾桶），当我尝试从按钮操作的文档目录中删除文件时崩溃。这是到目前为止的代码：

@property (retain, nonatomic) IBOutlet UIBarButtonItem *deleteCsv;



-(void)deleteCsv:(id)sender{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

    NSString *filePath = [documentsPath stringByAppendingPathComponent:fileDataString4];
    NSError *error;
    BOOL success = [fileManager removeItemAtPath:filePath error:&error];
    if (success) {
        UIAlertView *removedSuccessFullyAlert = [[UIAlertView alloc] initWithTitle:@"Congratulations:" message:@"Successfully removed" delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil];
        [removedSuccessFullyAlert show];
    }
    else
    {
        NSLog(@"Could not delete file -:%@ ",[error localizedDescription]);
    }

1 个解决方案

#1

I think you should check first whether file exist at path or not with following code,

我想你应该首先检查文件是否存在于路径中，代码如下：

if ([[NSFileManager defaultManager] fileExistsAtPath:[documentsDirectory stringByAppendingPathComponent:<your file path>]])
{
    //Delete your file
}

By following this you will be able to handle the crash if it is occuring because of file nonexistence

通过遵循此操作，您将能够处理由于文件不存在而发生的崩溃

#1