小编poi*_*ert的帖子

我遇到AVAssetExportSession的问题,其中进度停止增加但状态仍然表示它正在导出.这实际上是一种非常罕见的情况,它在99.99%的时间内完美无瑕地运行,但无论如何我想解决这个问题.

所以我开始出口:

    exportSession = [[AVAssetExportSession alloc] initWithAsset:composition presetName:AVAssetExportPresetMediumQuality];
    exportSession.videoComposition = videoComposition; 
    exportSession.outputFileType = @"com.apple.quicktime-movie";
    exportSession.outputURL = outputURL;
    [exportSession exportAsynchronouslyWithCompletionHandler:^{
        ...
    }];

然后有一个计时器检查进度:

    AVAssetExportSessionStatus status = [exportSession status];
    float progress = 0;
    if (status == AVAssetExportSessionStatusExporting) {
        progress = [exportSession progress];
    } else if (status == AVAssetExportSessionStatusCompleted) {
        progress = 1;
    }
    NSLog(@"%d %f", status, progress);
    [delegate processor:self didProgress:progress];

输出最终看起来像:

2012-05-23 14:28:59.494 **********[1899:707] 2 0.125991
2012-05-23 14:28:59.994 **********[1899:707] 2 0.185280
2012-05-23 14:29:00.494 **********[1899:707] 2 0.259393
2012-05-23 14:29:00.994 **********[1899:707] 2 0.326093
2012-05-23 …

我正在泄漏我的注释.有问题的代码(剥离到最低限度)是:

- (void)updateLocations:(NSArray *)result {
    [mapView removeAnnotations:locations];
    [locations removeAllObjects];
    [allLocations removeAllObjects];
    for (NSDictionary *location in result) {
        LocationAnnotation *annote = [[LocationAnnotation alloc] initWithInfo:location];
        [allLocations addObject:annote];
        [annote release];
    }
    [self updateAnnotations];
}

- (void)filterLocations {
    for (LocationAnnotation *annote in allLocations) {
        if (annote.typeFlag & filterFlags) {
            [locations addObject:annote];
        }
    }
}

- (void)updateAnnotations {
    [self filterLocations];
    [mapView addAnnotations:locations];
}

- (void)updateFilter {
    [mapView removeAnnotations:locations];
    [locations removeAllObjects];
    [self updateAnnotations];
}

allLocations是一个包含所有注释的数组(它们不一定在地图上),并且locations是一个数组,用于保存实际显示在地图中的位置.当updateLocations:被调用时,添加到地图的注释中的一些(或全部,它从测试变为测试)都在泄漏.注释的分配历史记录是:

#   Category            Event Type  Timestamp   RefCt …