从NSPasteboard mac获取剪贴板的对象

Question

我需要获得NSPasteboard的对象并将其存储在某个地方，以便稍后将其放回剪贴板。我现在只对text属性执行此操作。我想知道如何处理任何对象(例如:复制文件)。到目前为止，我的代码是获取文本并将其放回原处的代码：

NSString *pasteboardString;

//Save the value of the pasteboard
NSPasteboard *pasteboard= [NSPasteboard generalPasteboard];
pasteboardString= [pasteboard stringForType:NSStringPboardType];

//Clear the pasteboard
[pasteboard clearContents];

//Do some stuff with clipboard

//Write the old object back
if(pasteboardString!= NULL || pasteboardString.length != 0){
    [pasteboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
    [pasteboard setString:pasteboardString forType:NSStringPboardType];
}

Answer 1

我找到的最简单的方法是获取所有NSPasteboardItems的数组：

- (NSArray *)readFromPasteBoard
{
    NSMutableArray *pasteboardItems = [NSMutableArray array];
    for (NSPasteboardItem *item in [pasteboard pasteboardItems]) {
        //Create new data holder
        NSPasteboardItem *dataHolder = [[NSPasteboardItem alloc] init];
        //For each type in the pasteboard's items
        for (NSString *type in [item types]) {
            //Get each type's data and add it to the new dataholder
            NSData *data = [[item dataForType:type] mutableCopy];
            if (data) {
                [dataHolder setData:data forType:type];
            }
        }
        [pasteboardItems addObject:dataHolder];
    }
    return pasteboardItems;
}

从本页：Dissociating NSPasteboardItem from pasteboard

然后，您可以使用相同的数组( [pasteboard writeObjects:arrayPasteboardItems]; )在剪贴板操作之后将其写回pasteboard。

这将放回以前复制的任何对象(甚至文件、文件夹等)。