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Add image loading delegate method / cache instead of respondsToSelector

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This commit is contained in:
Garrett Moon 2016-02-12 15:04:14 -08:00
parent c1ca225e8d
commit cf1e4c87f5
2 changed files with 35 additions and 6 deletions
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9
AsyncDisplayKit/ASNetworkImageNode.h
View File

@ -95,6 +95,15 @@ NS_ASSUME_NONNULL_BEGIN
@optional
/**
* Notification that the image node started to load
*
* @param imageNode The sender.
*
* @discussion Called on a background queue.
*/
- (void)imageNodeDidStartLoading:(ASNetworkImageNode *)imageNode;
/**
* Notification that the image node failed to download the image.
*

32
AsyncDisplayKit/ASNetworkImageNode.mm
View File

@ -35,10 +35,15 @@
BOOL _imageLoaded;
BOOL _delegateSupportsDidStartLoading;
BOOL _delegateSupportsDidFailWithError;
BOOL _delegateSupportsImageNodeDidFinishDecoding;
//set on init only
BOOL _downloaderSupportsNewProtocol;
BOOL _downloaderImplementsSetProgress;
BOOL _downloaderImplementsSetPriority;
BOOL _cacheSupportsNewProtocol;
BOOL _cacheSupportsClearing;
}
@ -144,6 +149,10 @@
{
ASDN::MutexLocker l(_lock);
_delegate = delegate;
_delegateSupportsDidStartLoading = [delegate respondsToSelector:@selector(imageNodeDidStartLoading:)];
_delegateSupportsDidFailWithError = [delegate respondsToSelector:@selector(imageNode:didFailWithError:)];
_delegateSupportsImageNodeDidFinishDecoding = [delegate respondsToSelector:@selector(imageNodeDidFinishDecoding:)];
}
- (id<ASNetworkImageNodeDelegate>)delegate
@ -278,6 +287,13 @@
- (void)_lazilyLoadImageIfNecessary
{
if (!_imageLoaded && _URL != nil && _downloadIdentifier == nil) {
{
ASDN::MutexLocker l(_lock);
if (_delegateSupportsDidStartLoading) {
[_delegate imageNodeDidStartLoading:self];
}
}
if (_URL.isFileURL) {
{
ASDN::MutexLocker l(_lock);
@ -329,11 +345,14 @@
strongSelf->_cacheUUID = nil;
}
if (responseImage != NULL) {
[strongSelf->_delegate imageNode:strongSelf didLoadImage:strongSelf.image];
}
else if (error && [strongSelf->_delegate respondsToSelector:@selector(imageNode:didFailWithError:)]) {
[strongSelf->_delegate imageNode:strongSelf didFailWithError:error];
{
ASDN::MutexLocker l(strongSelf->_lock);
if (responseImage != NULL) {
[strongSelf->_delegate imageNode:strongSelf didLoadImage:strongSelf.image];
}
else if (error && _delegateSupportsDidFailWithError) {
[strongSelf->_delegate imageNode:strongSelf didFailWithError:error];
}
}
};
@ -377,7 +396,8 @@
- (void)asyncdisplaykit_asyncTransactionContainerStateDidChange
{
if (self.asyncdisplaykit_asyncTransactionContainerState == ASAsyncTransactionContainerStateNoTransactions) {
if (self.layer.contents != nil && [self.delegate respondsToSelector:@selector(imageNodeDidFinishDecoding:)]) {
ASDN::MutexLocker l(_lock);
if (self.layer.contents != nil && _delegateSupportsImageNodeDidFinishDecoding) {
[self.delegate imageNodeDidFinishDecoding:self];
}
}