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ASDisplayNodes now have an overidable method -placeholderImage that lets you provide a custom UIImage to display while a node is displaying asyncronously. The default implementation of this method returns nil and thus does nothing. A provided example project also demonstrates using the placeholder API.
44 lines
1.7 KiB
Objective-C
44 lines
1.7 KiB
Objective-C
/* This file provided by Facebook is for non-commercial testing and evaluation
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* purposes only. Facebook reserves all rights not expressly granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#import "SlowpokeShareNode.h"
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#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
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static NSUInteger const kRingCount = 3;
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static CGFloat const kRingStrokeWidth = 1.0;
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static CGSize const kIconSize = (CGSize){ 60.0, 17.0 };
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@implementation SlowpokeShareNode
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+ (void)drawRect:(CGRect)bounds withParameters:(id<NSObject>)parameters isCancelled:(asdisplaynode_iscancelled_block_t)isCancelledBlock isRasterizing:(BOOL)isRasterizing
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{
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usleep( (long)(0.8 * USEC_PER_SEC) ); // artificial delay of 0.8s
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[[UIColor colorWithRed:0.f green:122/255.f blue:1.f alpha:1.f] setStroke];
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for (NSUInteger i = 0; i < kRingCount; i++) {
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CGFloat x = i * kIconSize.width / kRingCount;
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CGRect frame = CGRectMake(x, 0.f, kIconSize.height, kIconSize.height);
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CGRect strokeFrame = CGRectInset(frame, kRingStrokeWidth, kRingStrokeWidth);
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UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:strokeFrame cornerRadius:kIconSize.height / 2.f];
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[path setLineWidth:kRingStrokeWidth];
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[path stroke];
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}
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}
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- (CGSize)calculateSizeThatFits:(CGSize)constrainedSize
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{
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return kIconSize;
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}
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@end
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