使用NSData分配Iphone

我有一种方法，可以从互联网上下载许多图像，然后将它们保存到设备上。代码如下：

-(IBAction) updateImages {
    for (x=0; x<[imagesToUpdate count]; x=x+1) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
    NSMutableDictionary *tempDic = [dic objectForKey:[imagesToUpdate objectAtIndex:x]];
    BOOL newDictionary = [self downloadChartForDictionary:tempDic];

    [pool drain];
    }

}


-(BOOL) downloadChartForDictionary:(NSMutableDictionary *)dictionary {

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
    NSMutableDictionary *updatedDictionary = [NSMutableDictionary dictionaryWithDictionary:dictionary];
    NSString *downloadString = [NSString stringWithFormat:@"http://www.photo.com/%@_0001.jpg",[updatedDictionary objectForKey:@"PDFName"]];
    [updatedDictionary setObject:serverAIRAC forKey:@"airac"];
    NSDate *date = [NSDate date];
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    formatter.dateFormat = @"MM-dd-y";
    NSString *dateString = [formatter stringFromDate:date];
    [updatedDictionary setObject:dateString forKey:@"date"];
    [formatter release];


    NSURL *url = [NSURL URLWithString:downloadString];
    NSData *data = [NSData dataWithContentsOfURL:url];


    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
    NSUserDomainMask, YES);
    NSString *docsPath = [paths objectAtIndex:0];


    NSString *savePath = [NSString stringWithFormat:@"%@/%@^%@_%@.jpg",docsPath,serverAIRAC,[updatedDictionary objectForKey:@"airport"],[updatedDictionary objectForKey:@"PDFName"]];

    BOOL downloaded = [data writeToFile:savePath atomically:YES];

    [pool drain];

    return YES;

}

-（iAction）更新图像{
对于（x=0；x您是否尝试了
[[[NSData alloc]initWithContentsOfURL:url]自动删除]
？这将把NSData对象放入当前的自动释放池。一个简单的alloc/init创建仍然需要您的显式管理。
尝试使用不同的读取选项。我会从开始，因为听起来好像您的数据正在缓存，而您不希望它被缓存。
这实际上不是一个问题…For出于某种原因，instruments报告了分配情况，但当我实际运行应用程序时，它从未崩溃。
令人沮丧的是，我有另一个控制器，它几乎做同样的事情，而且工作得非常完美。