/**
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* Tencent is pleased to support the open source community by making QMUI_iOS available.
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* Copyright (C) 2016-2021 THL A29 Limited, a Tencent company. All rights reserved.
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* Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
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*/
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//
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// QMUIDisplayLinkAnimation.m
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// WeRead
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//
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// Created by zhoonchen on 2018/9/3.
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//
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#import "QMUIDisplayLinkAnimation.h"
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#import "QMUICore.h"
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@interface QMUIDisplayLinkAnimation ()
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@property(nonatomic, strong, readwrite) CADisplayLink *displayLink;
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@property(nonatomic, assign) NSTimeInterval timeOffset;
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@property(nonatomic, assign) NSInteger curRepeatCount;
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@property(nonatomic, assign) BOOL isReversing;
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@end
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@implementation QMUIDisplayLinkAnimation
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- (instancetype)init {
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self = [super init];
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if (self) {
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self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(handleDisplayLink:)];
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self.fromValue = nil;
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self.toValue = nil;
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self.duration = 0;
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self.repeatCount = 0;
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self.easing = QMUIAnimationEasingsLinear;
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self.timeOffset = 0;
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self.animation = nil;
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}
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return self;
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}
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- (instancetype)initWithDuration:(CFTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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fromValue:(id)fromValue
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toValue:(id)toValue
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animation:(void (^)(id curValue))animation {
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if (self = [self init]) {
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self.duration = duration;
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self.easing = easing;
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self.fromValue = fromValue;
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self.toValue = toValue;
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self.animation = animation;
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}
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return self;
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}
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- (instancetype)initWithDuration:(CFTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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animations:(void (^)(QMUIDisplayLinkAnimation *animation, CGFloat curTime))animations {
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if (self = [self init]) {
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self.duration = duration;
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self.easing = easing;
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self.animations = animations;
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}
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return self;
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}
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- (void)dealloc {
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[_displayLink invalidate];
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_displayLink = nil;
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}
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- (void)startAnimation {
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if (!self.displayLink) {
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return;
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}
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if (self.displayLink.paused) {
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self.displayLink.paused = NO;
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return;
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}
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if (self.beginTime > 0) {
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.beginTime * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
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if (self.displayLink) {
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if (self.willStartAnimation) {
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self.willStartAnimation();
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}
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[self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
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}
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});
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} else {
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if (self.willStartAnimation) {
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self.willStartAnimation();
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}
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[self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
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}
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}
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- (void)stopAnimation {
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[self.displayLink invalidate];
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self.displayLink = nil;
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if (self.didStopAnimation) {
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self.didStopAnimation();
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}
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}
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- (void)handleDisplayLink:(CADisplayLink *)displayLink {
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if (!self.animation && !self.animations) {
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return;
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}
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NSTimeInterval oneFrame = 1.0 / [self preferredFramesPerSecond];
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if (self.autoreverses && self.isReversing) {
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self.timeOffset = MAX(self.timeOffset - oneFrame, 0);
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} else {
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self.timeOffset = MIN(self.timeOffset + oneFrame, self.duration);
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}
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CGFloat time = self.timeOffset / self.duration;
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if (self.animations) {
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self.animations(self, time);
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} else if (self.animation) {
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id curValue = [QMUIAnimationHelper interpolateFromValue:self.fromValue toValue:self.toValue time:time easing:self.easing];
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self.animation(curValue);
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}
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if (self.timeOffset >= self.duration) {
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[self beginToDecrease];
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} else if (self.timeOffset <= 0) {
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[self beginToIncrease];
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}
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}
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- (void)beginToIncrease {
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if (self.repeat && self.repeatCount > 0) {
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self.curRepeatCount++;
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}
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if (self.autoreverses) {
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self.isReversing = NO;
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}
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if (self.curRepeatCount >= self.repeatCount) {
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[self stopAnimation];
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}
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}
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- (void)beginToDecrease {
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if (self.repeat && self.repeatCount > 0) {
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self.curRepeatCount++;
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}
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if (self.repeat) {
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if (self.autoreverses) {
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self.isReversing = YES;
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} else {
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self.timeOffset = 0;
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}
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if (self.curRepeatCount >= self.repeatCount) {
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[self stopAnimation];
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}
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} else {
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[self stopAnimation];
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}
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}
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- (NSInteger)preferredFramesPerSecond {
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if (self.displayLink.preferredFramesPerSecond == 0) {
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// 不能写死60，而要拿当前设备支持的最大帧率来计算。根据 CADisplayLink 的官方文档，如果返回一个超过当前设备实际帧率的数字，实际依然会用设备实际帧率来计算，所以不用担心设备降频导致帧率降低后动画时长是否有问题。
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return UIScreen.mainScreen.maximumFramesPerSecond;
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}
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return self.displayLink.preferredFramesPerSecond;
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}
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@end
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@implementation QMUIDisplayLinkAnimation (ConvenienceClassMethod)
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+ (instancetype)springAnimateWithFromValue:(id)fromValue
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toValue:(id)toValue
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animation:(void (^)(id curValue))animation
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock {
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return [self animateWithDuration:SpringAnimationDefaultDuration
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easing:QMUIAnimationEasingsSpringKeyboard
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fromValue:fromValue
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toValue:toValue
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animation:animation
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createdBlock:createdBlock];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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fromValue:(id)fromValue
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toValue:(id)toValue
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animation:(void (^)(id curValue))animation {
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return [self animateWithDuration:duration
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easing:easing
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fromValue:fromValue
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toValue:toValue
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animation:animation
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createdBlock:nil];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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fromValue:(id)fromValue
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toValue:(id)toValue
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animation:(void (^)(id curValue))animation
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock {
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return [self animateWithDuration:duration
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easing:easing
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fromValue:fromValue
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toValue:toValue
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animation:animation
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createdBlock:createdBlock
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didStopBlock:nil];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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fromValue:(id)fromValue
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toValue:(id)toValue
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animation:(void (^)(id curValue))animation
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock
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didStopBlock:(void (^)(QMUIDisplayLinkAnimation *animation))didStopBlock {
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QMUIDisplayLinkAnimation *displayLinkAnimation = [[self alloc] initWithDuration:duration
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easing:easing
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fromValue:fromValue
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toValue:toValue
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animation:animation];
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if (createdBlock) {
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createdBlock(displayLinkAnimation);
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}
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__weak QMUIDisplayLinkAnimation *weakDisplayLinkAnimation = displayLinkAnimation;
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displayLinkAnimation.didStopAnimation = ^{
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if (didStopBlock) {
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didStopBlock(weakDisplayLinkAnimation);
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}
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};
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[displayLinkAnimation startAnimation];
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return displayLinkAnimation;
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}
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+ (instancetype)springAnimateWithAnimations:(void (^)(QMUIDisplayLinkAnimation *animation, CGFloat curTime))animations
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock {
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return [self animateWithDuration:SpringAnimationDefaultDuration
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easing:QMUIAnimationEasingsSpringKeyboard
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animations:animations
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createdBlock:createdBlock];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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animations:(void (^)(QMUIDisplayLinkAnimation *animation, CGFloat curTime))animations {
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return [self animateWithDuration:duration
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easing:easing
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animations:animations
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createdBlock:nil];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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animations:(void (^)(QMUIDisplayLinkAnimation *animation, CGFloat curTime))animations
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock {
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return [self animateWithDuration:duration
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easing:easing
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animations:animations
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createdBlock:createdBlock
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didStopBlock:nil];
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}
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+ (instancetype)animateWithDuration:(NSTimeInterval)duration
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easing:(QMUIAnimationEasings)easing
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animations:(void (^)(QMUIDisplayLinkAnimation *animation, CGFloat curTime))animations
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createdBlock:(void (^)(QMUIDisplayLinkAnimation *animation))createdBlock
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didStopBlock:(void (^)(QMUIDisplayLinkAnimation *animation))didStopBlock {
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QMUIDisplayLinkAnimation *displayLinkAnimation = [[self alloc] initWithDuration:duration
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easing:easing
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animations:animations];
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if (createdBlock) {
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createdBlock(displayLinkAnimation);
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}
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__weak QMUIDisplayLinkAnimation *weakDisplayLinkAnimation = displayLinkAnimation;
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displayLinkAnimation.didStopAnimation = ^{
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if (didStopBlock) {
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didStopBlock(weakDisplayLinkAnimation);
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}
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};
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[displayLinkAnimation startAnimation];
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return displayLinkAnimation;
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}
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@end
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