是的,这是可能的。
您必须使用ALAssetsLibrary
才能访问您的相机胶卷。然后你只是通过你的照片列举并要求定位。
assetsLibrary = [[ALAssetsLibrary alloc] init];
groups = [NSMutableArray array];
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if (group == nil)
{
return;
}
[groups addObject:group];
} failureBlock:^(NSError *error)
{
// Possibly, Location Services are disabled for your application or system-wide. You should notify user to turn Location Services on. With Location Services disabled you can't access media library for security reasons.
}];
这将枚举您的资产组。接下来,您挑选一个组并枚举其资产。
ALAssetGroup *group = [groups objectAtIndex:0];
[group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop)
{
if (result == nil)
{
return;
}
// Trying to retreive location data from image
CLLocation *loc = [result valueForProperty:ALAssetPropertyLocation];
}];
现在您的loc
变量包含拍摄照片的地点的位置。您应该在使用之前对照ALErrorInvalidProperty
进行检查,因为有些照片可能缺少此数据。
您可以指定ALAssetPropertyDate
以获取照片创建的日期和时间。