如何先保存粘贴板内容，然后再将其还原？
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我有一个不露面的Mac OS X应用程序，该应用程序需要复制其他应用程序中的选择。我是通过模拟CMD + C击键来实现的。它运作完美。
但是，我认为这是至关重要的副作用。未经用户许可，它将覆盖用户的粘贴板。
因此，我在考虑复制选择之前应该先保存剪贴板内容，然后再将其还原。有人可以给我一些提示，也许是示例代码吗？
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括宠
@implementation NSPasteboard (SaveAndRestore) // save current contents as an array of pasteboard items - (NSArray *)save { NSMutableArray *archive=[NSMutableArray array]; for (NSPasteboardItem *item in [self pasteboardItems]) { NSPasteboardItem *archivedItem=[[NSPasteboardItem alloc] init]; for (NSString *type in [item types]) { /* The mutableCopy performs a deep copy of the data. This avoids memory leak issues (bug in Cocoa?), which you might run into if you don\'t copy the data. */ NSData *data=[[item dataForType:type] mutableCopy]; if (data) { // nil safety check [archivedItem setData:data forType:type]; } } [archive addObject:archivedItem]; } return archive; } // restore previously saved data - (void)restore:(NSArray *)archive { [self clearContents]; [self writeObjects:archive]; } @end遣莫捅炭
。将为您提供共享的粘贴板，您可以使用该类来获取和设置内容。抢垢洛韧
#import <objc/runtime.h> static void * kArchiveKey = &kArchiveKey; @implementation NSPasteboard (SaveRestore) - (void)setArchive:(NSArray *)newArchive { objc_setAssociatedObject(self, kArchiveKey, newArchive, OBJC_ASSOCIATION_RETAIN); } - (NSArray *)archive { return objc_getAssociatedObject(self, kArchiveKey); } - (void)save { NSMutableArray *archive = [NSMutableArray array]; for (NSPasteboardItem *item in [self pasteboardItems]) { NSPasteboardItem *archivedItem = [[NSPasteboardItem alloc] init]; for (NSString *type in [item types]) { NSData *data = [item dataForType:type]; if (data) { [archivedItem setData:data forType:type]; } } [archive addObject:archivedItem]; } [self setArchive:archive]; } - (void)restore { [self clearContents]; [self writeObjects:[self archive]]; } @end