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15a789c719
There are content inset problems if a ASViewController is initialized with a root node (e.g a ASCollectionNode subclass) that has usesImplicitHierarchyManagement set to YES. The reason for that is that the subviews (e.g. the UICollectionView) of the ASViewController root node get's added to the view hierarchy in measureWithSizeRange: in ASDisplayNode. measureWithSizeRange: of the root node is called in -viewWillLayoutSubviews in ASViewController. That is too late, so UIKit does not apply the automatic content inset to the UICollectionView anymore.
136 lines
3.7 KiB
Objective-C
136 lines
3.7 KiB
Objective-C
//
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// ASViewController.m
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// AsyncDisplayKit
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//
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// Created by Huy Nguyen on 16/09/15.
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// Copyright (c) 2015 Facebook. All rights reserved.
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//
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#import "ASViewController.h"
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#import "ASAssert.h"
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#import "ASDimension.h"
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#import "ASDisplayNode+FrameworkPrivate.h"
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#import "ASDisplayNode+Beta.h"
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#import "ASRangeControllerUpdateRangeProtocol+Beta.h"
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@implementation ASViewController
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{
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BOOL _ensureDisplayed;
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BOOL _automaticallyAdjustRangeModeBasedOnViewEvents;
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}
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- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
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{
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ASDisplayNodeAssert(NO, @"ASViewController requires using -initWithNode:");
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return [self initWithNode:[[ASDisplayNode alloc] init]];
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}
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- (instancetype)initWithCoder:(NSCoder *)aDecoder
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{
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ASDisplayNodeAssert(NO, @"ASViewController requires using -initWithNode:");
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return [self initWithNode:[[ASDisplayNode alloc] init]];
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}
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- (instancetype)initWithNode:(ASDisplayNode *)node
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{
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if (!(self = [super initWithNibName:nil bundle:nil])) {
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return nil;
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}
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ASDisplayNodeAssertNotNil(node, @"Node must not be nil");
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ASDisplayNodeAssertTrue(!node.layerBacked);
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_node = node;
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_automaticallyAdjustRangeModeBasedOnViewEvents = NO;
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return self;
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}
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- (void)loadView
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{
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ASDisplayNodeAssertTrue(!_node.layerBacked);
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// Apple applies a frame and autoresizing masks we need. Allocating a view is not
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// nearly as expensive as adding and removing it from a hierarchy, and fortunately
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// we can avoid that here. Enabling layerBacking on a single node in the hierarchy
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// will have a greater performance benefit than the impact of this transient view.
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[super loadView];
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UIView *view = self.view;
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CGRect frame = view.frame;
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UIViewAutoresizing autoresizingMask = view.autoresizingMask;
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// We have what we need, so now create and assign the view we actually want.
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view = _node.view;
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_node.frame = frame;
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_node.autoresizingMask = autoresizingMask;
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self.view = view;
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}
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- (void)viewWillLayoutSubviews
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{
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[super viewWillLayoutSubviews];
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[_node measureWithSizeRange:[self nodeConstrainedSize]];
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}
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- (void)viewDidLayoutSubviews
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{
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if (_ensureDisplayed && self.neverShowPlaceholders) {
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_ensureDisplayed = NO;
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[self.node recursivelyEnsureDisplaySynchronously:YES];
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}
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[super viewDidLayoutSubviews];
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}
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- (void)viewWillAppear:(BOOL)animated
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{
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[super viewWillAppear:animated];
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_ensureDisplayed = YES;
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[_node measureWithSizeRange:[self nodeConstrainedSize]];
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[_node recursivelyFetchData];
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[self updateCurrentRangeModeWithModeIfPossible:ASLayoutRangeModeFull];
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}
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- (void)viewDidDisappear:(BOOL)animated
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{
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[super viewDidDisappear:animated];
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[self updateCurrentRangeModeWithModeIfPossible:ASLayoutRangeModeMinimum];
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}
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#pragma mark - Automatic range mode
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- (BOOL)automaticallyAdjustRangeModeBasedOnViewEvents
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{
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return _automaticallyAdjustRangeModeBasedOnViewEvents;
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}
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- (void)setAutomaticallyAdjustRangeModeBasedOnViewEvents:(BOOL)automaticallyAdjustRangeModeBasedOnViewEvents
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{
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_automaticallyAdjustRangeModeBasedOnViewEvents = automaticallyAdjustRangeModeBasedOnViewEvents;
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}
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- (void)updateCurrentRangeModeWithModeIfPossible:(ASLayoutRangeMode)rangeMode
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{
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if (!_automaticallyAdjustRangeModeBasedOnViewEvents) { return; }
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if (![_node conformsToProtocol:@protocol(ASRangeControllerUpdateRangeProtocol)]) { return; }
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id<ASRangeControllerUpdateRangeProtocol> updateRangeNode = (id<ASRangeControllerUpdateRangeProtocol>)_node;
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[updateRangeNode updateCurrentRangeWithMode:rangeMode];
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}
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#pragma mark - Layout Helpers
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- (ASSizeRange)nodeConstrainedSize
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{
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CGSize viewSize = self.view.bounds.size;
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return ASSizeRangeMake(viewSize, viewSize);
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}
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- (ASInterfaceState)interfaceState
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{
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return _node.interfaceState;
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}
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@end
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