cocoa - 将字符串写入 NSPasteBoard

Question

我无法让此方法返回 YES:

- (BOOL) writeToPasteBoard:(NSString *)stringToWrite
{
    return [pasteBoard setString:stringToWrite forType:NSStringPboardType];
}

我已经验证 stringToWrite 是否正确通过，该方法总是返回 NO。

有什么想法吗？

这是类(class)的其余部分:

@interface ClipBoard : NSObject {
    NSPasteboard *pasteBoard;
}

- (BOOL) writeToPasteBoard:(NSString *)stringToWrite;
- (NSString *) readFromPasteBoard;
@end

@implementation ClipBoard
- (id) init
{
    [super init];
    pasteBoard = [NSPasteboard generalPasteboard];
    return self;
}

- (BOOL) writeToPasteBoard:(NSString *)stringToWrite
{
    return [pasteBoard setString:stringToWrite forType:NSStringPboardType];
}

- (NSString *) readFromPasteBoard
{
    return [pasteBoard stringForType:NSStringPboardType];
}

@结束

Answer 1

这是该方法的工作版本:

- (BOOL) writeToPasteBoard:(NSString *)stringToWrite
{
    [pasteBoard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
    return [pasteBoard setString:stringToWrite forType:NSStringPboardType];
}