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Enable ASRangeControllerUpdateRangeProtocol by default if view controller or node support it. (#2133)

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This commit is contained in:
Garrett Moon 2016-08-25 21:18:04 -07:00 committed by Adlai Holler
parent 04ecd4180e
commit e3091737ca
2 changed files with 10 additions and 13 deletions
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2
AsyncDisplayKit/ASViewController.h
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@ -68,7 +68,7 @@ typedef ASTraitCollection * _Nonnull (^ASDisplayTraitsForTraitWindowSizeBlock)(C
* Automatically adjust range mode based on view events. If you set this to YES, the view controller or its node
* must conform to the ASRangeControllerUpdateRangeProtocol.
*
* Default value is NO.
* Default value is YES *if* node or view controller conform to ASRangeControllerUpdateRangeProtocol otherwise it is NO.
*/
@property (nonatomic, assign) BOOL automaticallyAdjustRangeModeBasedOnViewEvents;

21
AsyncDisplayKit/ASViewController.mm
View File

@ -29,7 +29,6 @@
NSInteger _visibilityDepth;
BOOL _selfConformsToRangeModeProtocol;
BOOL _nodeConformsToRangeModeProtocol;
BOOL _didCheckRangeModeProtocolConformance;
}
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
@ -54,7 +53,9 @@
ASDisplayNodeAssertTrue(!node.layerBacked);
_node = node;
_automaticallyAdjustRangeModeBasedOnViewEvents = NO;
_selfConformsToRangeModeProtocol = [self conformsToProtocol:@protocol(ASRangeControllerUpdateRangeProtocol)];
_nodeConformsToRangeModeProtocol = [_node conformsToProtocol:@protocol(ASRangeControllerUpdateRangeProtocol)];
_automaticallyAdjustRangeModeBasedOnViewEvents = _selfConformsToRangeModeProtocol || _nodeConformsToRangeModeProtocol;
return self;
}
@ -168,22 +169,18 @@ ASVisibilityDepthImplementation;
- (void)setAutomaticallyAdjustRangeModeBasedOnViewEvents:(BOOL)automaticallyAdjustRangeModeBasedOnViewEvents
{
_automaticallyAdjustRangeModeBasedOnViewEvents = automaticallyAdjustRangeModeBasedOnViewEvents;
if (automaticallyAdjustRangeModeBasedOnViewEvents != _automaticallyAdjustRangeModeBasedOnViewEvents) {
if (automaticallyAdjustRangeModeBasedOnViewEvents && _selfConformsToRangeModeProtocol == NO && _nodeConformsToRangeModeProtocol == NO) {
NSLog(@"Warning: automaticallyAdjustRangeModeBasedOnViewEvents set to YES in %@, but range mode updating is not possible because neither view controller nor node %@ conform to ASRangeControllerUpdateRangeProtocol.", self, _node);
}
_automaticallyAdjustRangeModeBasedOnViewEvents = automaticallyAdjustRangeModeBasedOnViewEvents;
}
}
- (void)updateCurrentRangeModeWithModeIfPossible:(ASLayoutRangeMode)rangeMode
{
if (!_automaticallyAdjustRangeModeBasedOnViewEvents) { return; }
if (!_didCheckRangeModeProtocolConformance) {
_selfConformsToRangeModeProtocol = [self conformsToProtocol:@protocol(ASRangeControllerUpdateRangeProtocol)];
_nodeConformsToRangeModeProtocol = [_node conformsToProtocol:@protocol(ASRangeControllerUpdateRangeProtocol)];
_didCheckRangeModeProtocolConformance = YES;
if (!_selfConformsToRangeModeProtocol && !_nodeConformsToRangeModeProtocol) {
NSLog(@"Warning: automaticallyAdjustRangeModeBasedOnViewEvents set to YES in %@, but range mode updating is not possible because neither view controller nor node %@ conform to ASRangeControllerUpdateRangeProtocol.", self, _node);
}
}
if (_selfConformsToRangeModeProtocol) {
id<ASRangeControllerUpdateRangeProtocol> rangeUpdater = (id<ASRangeControllerUpdateRangeProtocol>)self;
[rangeUpdater updateCurrentRangeWithMode:rangeMode];