objective-c - 无法将项目移动到废纸篓

Question

我正在尝试将项目从“下载”移动到我的“垃圾箱”文件夹，但首先不删除它们。我在下面的实现中缺少什么，文件没有移动。

---

规格：

 NSString *trashpath=[NSHomeDirectory() stringByAppendingPathComponent:@".Trash"];
 NSString *downloadpath=[NSHomeDirectory() stringByAppendingPathComponent:@"Downloads"];

---

- (void) moveToTrash{
    NSError * error = nil;
    NSArray * list =  [_filemanager contentsOfDirectoryAtPath:_downloadpath error:&error];


    //Move items to the trash
    for(id obj in list){
        NSString *sourcepath = [_downloadpath stringByAppendingPathComponent:obj];
        NSString *destpath= [_trashpath stringByAppendingPathComponent:obj];

        if([_filemanager moveItemAtPath:sourcepath toPath:destpath error:&error] == YES)
            NSLog(@"Moved to trash :%@ ",destpath);
        else
            NSLog(@"Unable to move %@ ",sourcepath);

    }
}

---

我尝试按照 BergQuester 的建议使用下面的代码

   if([[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceRecycleOperation source:_downloadpath
        destination:@"" files:list tag:nil] == YES)
        NSLog(@"Moved to Trash");
    else
        NSLog(@"Unable to move :%@",[error localizedFailureReason]);

我的输出中出现 Unable to move :(null) 。

文件确实在那里，所以我不确定问题仍然存在。

Answer 1

您可以通过在 else 中记录错误来找出问题所在：

NSLog(@"Unable to move %@ %@", sourcepath, [error localizedDescription]);

此外，除非您在遇到错误时中止循环，否则您应该重置error为nil.

此外，您可能应该使用NSWorkspace而performFileOperation:NSWorkspaceRecycleOperation不是单独移动每个文件：

[[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceRecycleOperation
                                             source:_downloadpath
                                        destination:@""
                                              files:list
                                                tag:nil];