Question

我试图用手写一个文件,因为它在撰写报告时冻结了我的照片,但当发射文件时,它坠毁。

2011-10-04 21:53:51.022 xxxxxxxxx[2046:6603] *** Terminating app due to uncaught exception  NSFileHandleOperationException , reason:  *** -[NSConcreteFileHandle seekToEndOfFile]: Operation timed out

我的法典:

- (void)WriteTest{
    [NSThread detachNewThreadSelector:@selector(DoWriteTest:) toTarget:self withObject:hFile];
}

- (void)DoWriteTest:(NSFileHandle *)aHandle{
    int i;

    if (aHandle)   {
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

        NSLog(@"---start--- writing test file --");
        for (i=0; i<1024*1024; i++) {
            [aHandle seekToEndOfFile];
            [aHandle writeData:[NSData dataWithBytes:bytes length:(sizeof bytes) - 1]];
            usleep(1);
        }

        NSLog(@"---end--- writing test file");

        [pool release];
    } else {
        NSLog(@"ERROR: writing test file thread");
    }
}

如果这行不通,那么你可以解释一下什么错了,那就做了很多的索戈,但找不到解决办法。感谢。

Answer 1

你的法典为我工作。我的猜测是,你开立了错误的档案。并请注意,您应使用<代码>[集合排水]而不是<代码>[集合发布],但这是引人注意的。我的全文如下。如果存在任何问题,请作评论。希望会有所助益。

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    fileHandle = [NSFileHandle fileHandleForWritingAtPath:@"/Users/Drew/Desktop/test.txt"];
    [NSThread detachNewThreadSelector:@selector(threadSelector:) toTarget:self withObject:fileHandle];
}

- (void)threadSelector:(NSFileHandle *)aHandle {
    if (aHandle)   {
         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
         int i;
         for (i=0; i<1024; i++)
         {
             [aHandle seekToEndOfFile];
             char buffer[1024] = "a string ";
             [aHandle writeData:[NSData dataWithBytes:buffer length:(sizeof buffer) - 1]];
             usleep(1);
         }
         [pool drain];
    }
}

友情链接