iOS11, Beta 6. Xcode 9.0 Beta6.
Test device: iPhone 7 with iOS11, Beta 6
Images on device:
/var/mobile/Media/DCIM/100APPLE/IMG_0001.HEIC <-- portrait image taken on camera
/var/mobile/Media/DCIM/100APPLE/IMG_0002.HEIC <-- portrait image taken on camera
/var/mobile/Media/DCIM/100APPLE/IMG_0003.HEIC <-- landscape image taken on camera
Description:
When we query HEIC PHAssets and then try to convert them to UIImages, we notice that if the requested UIImage is a certain size, we get an error logged to the console. When I look at the UIImage in the debugger, the image data appears to have loaded correctly. That said, we have seen some questionable downstream behavior which combined with the error in the console makes us wonder if there is a bug on the Apple side. The code snippet below distills this as simple as possible. I am debugging on the iPhone 7 with it attached to the Mac. Note the tests below and how they relate to the portrait/landscape version of the images.
Code:
- (void)load
{
PHFetchResult<PHAsset *> *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
PHCachingImageManager *manager = [[PHCachingImageManager alloc] init];
for (NSUInteger index=0; index < fetchResult.count; index++) {
PHAsset *localAsset = (PHAsset *)[fetchResult objectAtIndex:index];
CGSize targetSize = CGSizeMake(300,300);
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
options.resizeMode = PHImageRequestOptionsResizeModeExact;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
options.networkAccessAllowed = YES;
options.synchronous = NO;
options.version = PHImageRequestOptionsVersionCurrent;
[manager requestImageForAsset:localAsset targetSize:targetSize contentMode:PHImageContentModeAspectFill options:options
resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
NSLog(@"================> %@", result);
}];
}
}
Output:
2017-08-25 14:42:30.179230-0600 FakePicker[942:335069] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0001.HEIC
2017-08-25 14:42:30.180855-0600 FakePicker[942:335069] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0002.HEIC
2017-08-25 14:42:30.182445-0600 FakePicker[942:335071] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0003.HEIC
2017-08-25 14:42:30.193726-0600 FakePicker[942:335050] refreshPreferences: HangTracerEnabled: 1
2017-08-25 14:42:30.193766-0600 FakePicker[942:335050] refreshPreferences: HangTracerDuration: 500
2017-08-25 14:42:30.193784-0600 FakePicker[942:335050] refreshPreferences: ActivationLoggingEnabled: 0 ActivationLoggingTaskedOffByDA:0
2017-08-25 14:42:30.331189-0600 FakePicker[942:335050] ================> <UIImage: 0x1c40a4e60>, {300, 300}
2017-08-25 14:42:30.349985-0600 FakePicker[942:335050] ================> <UIImage: 0x1c40a4c80>, {300, 300}
2017-08-25 14:42:30.351027-0600 FakePicker[942:335050] ================> <UIImage: 0x1c40a52e0>, {300, 300}
=================
With CGSize targetSize = CGSizeMake(200,200);
Output:
2017-08-25 14:44:27.083576-0600 FakePicker[944:335644] refreshPreferences: HangTracerEnabled: 1
2017-08-25 14:44:27.083620-0600 FakePicker[944:335644] refreshPreferences: HangTracerDuration: 500
2017-08-25 14:44:27.083637-0600 FakePicker[944:335644] refreshPreferences: ActivationLoggingEnabled: 0 ActivationLoggingTaskedOffByDA:0
2017-08-25 14:44:27.089644-0600 FakePicker[944:335644] ================> <UIImage: 0x1c02a2520>, {200, 200}
2017-08-25 14:44:27.090336-0600 FakePicker[944:335644] ================> <UIImage: 0x1c42a07e0>, {200, 200}
2017-08-25 14:44:27.090941-0600 FakePicker[944:335644] ================> <UIImage: 0x1c02a2520>, {200, 200}
=================
With CGSize targetSize = CGSizeMake(300,200);
Output:
2017-08-25 14:45:03.476569-0600 FakePicker[947:335984] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0001.HEIC
2017-08-25 14:45:03.477288-0600 FakePicker[947:335982] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0002.HEIC
2017-08-25 14:45:03.490331-0600 FakePicker[947:335959] refreshPreferences: HangTracerEnabled: 1
2017-08-25 14:45:03.490373-0600 FakePicker[947:335959] refreshPreferences: HangTracerDuration: 500
2017-08-25 14:45:03.490390-0600 FakePicker[947:335959] refreshPreferences: ActivationLoggingEnabled: 0 ActivationLoggingTaskedOffByDA:0
2017-08-25 14:45:03.500767-0600 FakePicker[947:335959] ================> <UIImage: 0x1c00bbe40>, {300, 200}
2017-08-25 14:45:03.598622-0600 FakePicker[947:335959] ================> <UIImage: 0x1c00bbba0>, {300, 200}
2017-08-25 14:45:03.603892-0600 FakePicker[947:335959] ================> <UIImage: 0x1c00b90e0>, {300, 200}
=================
With CGSize targetSize = CGSizeMake(200,300);
Output:
2017-08-25 14:45:40.443282-0600 FakePicker[949:336319] [ImageManager] Unable to load image data, /var/mobile/Media/DCIM/100APPLE/IMG_0003.HEIC
2017-08-25 14:45:40.445260-0600 FakePicker[949:336297] refreshPreferences: HangTracerEnabled: 1
2017-08-25 14:45:40.445296-0600 FakePicker[949:336297] refreshPreferences: HangTracerDuration: 500
2017-08-25 14:45:40.445312-0600 FakePicker[949:336297] refreshPreferences: ActivationLoggingEnabled: 0 ActivationLoggingTaskedOffByDA:0
2017-08-25 14:45:40.449138-0600 FakePicker[949:336297] ================> <UIImage: 0x1c40b0f80>, {200, 300}
2017-08-25 14:45:40.450187-0600 FakePicker[949:336297] ================> <UIImage: 0x1c00b1040>, {200, 300}
2017-08-25 14:45:40.539843-0600 FakePicker[949:336297] ================> <UIImage: 0x1c00b1040>, {200, 300}
