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iOS实现图片内容扭曲效果

iOS实现图片内容扭曲效果

作者: 扶兮摇兮 | 来源:发表于2020-04-21 19:43 被阅读0次
    
    //
    //  ZKRBaiWeiAdManager.m
    //  VAPictureBoomAnimationDemo
    //
    //  Created by ZAKER on 2019/6/4.
    //  Copyright © 2019 ZAKER. All rights reserved.
    //
    
    #import "ZKRBaiWeiAdManager.h"
    
    static ZKRBaiWeiAdManager *shareManager = nil;
    
    @interface ZKRBaiWeiAdManager ()
    
    @property (nonatomic, strong) UIView *animationView;
    
    @property (nonatomic, strong) AVPlayer *player;
    
    @property (nonatomic, strong) AVPlayerLayer *palyLayer;
    
    @property (nonatomic, assign) ZKRBaiWeiAVPlayerStatus status;
    
    @property (nonatomic, weak) UIButton *maskBtn;
    
    @property (nonatomic, strong) id listenObj;
    
    @property (nonatomic, weak) id <ZKRBaiWeiAdManagerPlayerDelegate>delegate;
    
    @property (nonatomic, assign) BOOL isAlreadlyStartPlaying;
    
    @property (nonatomic, assign) BOOL isAlreadlyStartAnimating;
    
    
    @end
    
    @implementation ZKRBaiWeiAdManager
    
    + (instancetype)shareManager{
        
        shareManager = [[ZKRBaiWeiAdManager alloc] init];
        return shareManager;
    }
    
    + (instancetype)allocWithZone:(struct _NSZone *)zone{
        
        if (shareManager) {
            return shareManager;
        }
        
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
           shareManager = [super allocWithZone:zone];
        });
        return shareManager;
    }
    - (UIImage *)clipTofullScreen{
        
        UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
        
        CGSize imageSize = CGSizeZero;
        if (UIInterfaceOrientationIsPortrait(orientation))
            imageSize = [UIScreen mainScreen].bounds.size;
        else
            imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);
        
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, [UIScreen mainScreen].scale);
        CGContextRef context = UIGraphicsGetCurrentContext();
        
        for (UIWindow *window in [[UIApplication sharedApplication] windows])
        {
            CGContextSaveGState(context);
            CGContextTranslateCTM(context, window.center.x, window.center.y);
            CGContextConcatCTM(context, window.transform);
            CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y);
           
                if(orientation == UIInterfaceOrientationLandscapeLeft){
                    CGContextRotateCTM(context, (CGFloat)M_PI_2);
                    CGContextTranslateCTM(context, 0, -imageSize.width);
                }
                else if(orientation == UIInterfaceOrientationLandscapeRight){
                    CGContextRotateCTM(context, (CGFloat)-M_PI_2);
                    CGContextTranslateCTM(context, -imageSize.height, 0);
                }
                else if(orientation == UIInterfaceOrientationPortraitUpsideDown)
                {
                    CGContextRotateCTM(context, (CGFloat)M_PI);
                    CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);
                }
            
                if([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]){
                    [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
                }
            
            else{
                [window.layer renderInContext:UIGraphicsGetCurrentContext()];
            }
            
            CGContextRestoreGState(context);
        }
        
        UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
        
        UIGraphicsEndImageContext();
        
        return newImage;
    }
    
    
    - (UIView *)animationView{
        if (!_animationView) {
            UIView *animationView = [[UIView alloc] init];
            _animationView = animationView;
        }
        
        return _animationView;
    }
    
    - (UIView *)lancinateAnimationView:(UIView *)view size:(CGSize)size{
        
        self.animationView.frame = view.bounds;
        [view.superview addSubview:self.animationView];
        
        UIGraphicsBeginImageContext(view.bounds.size);
        [[UIColor clearColor] setFill];
        [[UIBezierPath bezierPathWithRect:view.bounds] fill];
        CGContextRef ctx = UIGraphicsGetCurrentContext();
        [view.layer renderInContext:ctx];
        
        UIImage *screenshotImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        
        NSInteger maxX = floor(screenshotImage.size.width / size.width);
        NSInteger maxY = floor(screenshotImage.size.height / size.height);
        
        for (int i=0; i<maxX; i++) {
            for (int j = 0; j<maxY; j++) {
                
                @autoreleasepool {
                    
                    CALayer* layer = [[CALayer alloc] init];
                    layer.frame = CGRectMake(i*size.width, (maxY-j-1)*size.height, size.width, size.height);
                    CGContextRef offscreenContext = CGBitmapContextCreate(NULL,
                                                                          size.width,
                                                                          size.height,
                                                                          8,
                                                                          0,
                                                                          CGImageGetColorSpace(screenshotImage.CGImage),
                                                                          kCGBitmapByteOrderDefault | kCGImageAlphaPremultipliedFirst);
                    CGContextTranslateCTM(offscreenContext, -i*size.width, -j*size.height);
                    CGContextDrawImage(offscreenContext, CGRectMake(0, 0, screenshotImage.size.width, screenshotImage.size.height), screenshotImage.CGImage);
                    CGImageRef imageRef = CGBitmapContextCreateImage(offscreenContext);
                    
                    layer.contents = CFBridgingRelease(imageRef);
                    CGContextRelease(offscreenContext);
                    [self.animationView.layer addSublayer:layer];
                    
                }
            }
        }
    
        return self.animationView;
        
    }
    - (void)lancinateAnimationView:(UIView *)view horizontalscale:(CGFloat)sublayerH animationScaleRatio:(CGFloat)scaleRatio animationDuration:(CGFloat)duration repeatCount:(NSInteger)conut isRemoveMask:(BOOL)isRemove completeBlock:(completeBlock)completeBlock{
        
        [self lancinateAnimationView:view size:CGSizeMake(view.bounds.size.width, sublayerH)];
         CGFloat ratio = scaleRatio * 2.0 /(self.animationView.layer.sublayers.count *0.01);
         CGFloat baseValue = [self getRandRangeFloutValue:scaleRatio];
        [self doLancinateAnimationKeyPath:@"transform.scale.x" ratio:ratio scaleRatio:(CGFloat)scaleRatio baseValue:baseValue duration:duration repeatCount:conut isRemoveMask:isRemove completeBlock:completeBlock];
    }
    - (void)lancinateAnimationView:(UIView *)view verticalScale:(CGFloat)sublayerW animationScaleRatio:(CGFloat)scaleRatio animationDuration:(CGFloat)duration repeatCount:(NSInteger)conut isRemoveMask:(BOOL)isRemove completeBlock:(completeBlock)completeBlock{
        
        [self lancinateAnimationView:view size:CGSizeMake(sublayerW, view.bounds.size.height)];
        CGFloat baseValue = [self getRandRangeFloutValue:scaleRatio];
        CGFloat ratio = scaleRatio * 2.0 /(self.animationView.layer.sublayers.count *0.03);
        [self doLancinateAnimationKeyPath:@"transform.scale.y" ratio:ratio scaleRatio:(CGFloat)scaleRatio baseValue:baseValue duration:duration repeatCount:conut isRemoveMask:isRemove completeBlock:completeBlock];
    }
    
    - (void)doLancinateAnimationKeyPath:(NSString *)key ratio:(CGFloat)ratio scaleRatio:(CGFloat)scaleRatio baseValue:(CGFloat)baseValue duration:(CGFloat)duration repeatCount:(NSInteger)conut isRemoveMask:(BOOL)isRemove completeBlock:(completeBlock)completeBlock{
        
        for (CALayer *shape in self.animationView.layer.sublayers) {
            @autoreleasepool {
                CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:key];
                scaleAnimation.fromValue = @(1.0);
                CGFloat resultValue = [self getRandFloutRadioValue:ratio baseValue:baseValue limitValue:scaleRatio];
                baseValue = resultValue;
                scaleAnimation.toValue = @(resultValue + 1.0);
                scaleAnimation.duration = duration;
                scaleAnimation.repeatCount  = conut;
                [shape addAnimation:scaleAnimation forKey:@"lancinateAnimationX"];
            }
        }
        
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            
            if (isRemove) {
                [self.animationView removeFromSuperview];
                self.animationView = nil;
            }
           
            if (completeBlock) {
                completeBlock();
            }
        });
    }
    
    - (CGFloat)getRandRangeFloutValue:(CGFloat)rangeValue{
        return (float)random()/(float)RAND_MAX *rangeValue *2.0 - rangeValue;;
    }
    
    - (CGFloat)getRandFloutRadioValue:(CGFloat)radioValue baseValue:(CGFloat)baseValue limitValue:(CGFloat)limitValue{
        
        CGFloat randGradualValue = [self getRandRangeFloutValue:radioValue];
        CGFloat result = baseValue + randGradualValue;
         while (fabs(result) >= limitValue) {
             randGradualValue = [self getRandRangeFloutValue:radioValue];
             result = baseValue + randGradualValue;
        }
        return result;
    }
    
    - (void)lancinateAnimateDefaultModeView:(UIView *)view completeBlock:(completeBlock)completeBlock{
        
        if (self.isAlreadlyStartAnimating) {
            return;
        }
        
        self.isAlreadlyStartAnimating = YES;
        
        CGFloat horizonScale = 2.0;
        CGFloat verticalScale = 2.0;
        CGFloat animationTime = 0.4;
        CGFloat horizonScaleRatio = 0.048;
        CGFloat verticalScaleRatio = 0.039;
        
        [self lancinateAnimationView:view horizontalscale:horizonScale animationScaleRatio:horizonScaleRatio animationDuration:animationTime repeatCount:1 isRemoveMask:YES completeBlock:^{
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                [self lancinateAnimationView:view verticalScale:verticalScale animationScaleRatio:verticalScaleRatio animationDuration:animationTime repeatCount:1 isRemoveMask:YES completeBlock:^{
                    
                    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                        [self lancinateAnimationView:view horizontalscale:horizonScale animationScaleRatio:horizonScaleRatio animationDuration:animationTime  repeatCount:1 isRemoveMask:YES completeBlock:^{
                            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                                [self lancinateAnimationView:view verticalScale:verticalScale animationScaleRatio:verticalScaleRatio animationDuration:animationTime repeatCount:1 isRemoveMask:NO completeBlock:^{
                                    
                                    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.15 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                                        self.isAlreadlyStartAnimating = NO;
                                        if (completeBlock) {
                                            completeBlock();
                                        }
                                    });
                                }];
                            });
                        }];
                    });
                }];
            });
        }];
    }
    
    - (void)removeMaskView{
        
        if (self.animationView) {
            [self.animationView removeFromSuperview];
            self.animationView = nil;
        }
    }
    
    /// 视频相关
    - (void)playToFullScreen:(NSURL *)videoURL delegate:(id<ZKRBaiWeiAdManagerPlayerDelegate>)delegate{
    
        [self playWithPlayer:videoURL playToView:[UIApplication sharedApplication].keyWindow delegate:delegate];
    }
    
    - (void)playWithPlayer:(NSURL *)videoURL playToView:(UIView *)view delegate:(id<ZKRBaiWeiAdManagerPlayerDelegate>)delegate{
        
        if (self.isAlreadlyStartPlaying) {
            return;
        }
        
        if (!videoURL) {
            NSLog(@"videoURL不能为空");
            return;
        }
        
        if (!view) {
            NSLog(@"view不能为空");
            return;
        }
        
        if (delegate) {
            _delegate = delegate;
        }
        
        AVPlayer *player = [AVPlayer playerWithURL:videoURL];
        self.player = player;
        self.palyLayer = [AVPlayerLayer playerLayerWithPlayer:player];
        self.palyLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
        self.palyLayer.frame = view.bounds;
        
        UIButton *maskBtn = [UIButton new];
        _maskBtn = maskBtn;
        [maskBtn addTarget:self action:@selector(touchedVideo) forControlEvents:UIControlEventTouchUpInside];
        maskBtn.backgroundColor = [UIColor clearColor];
        maskBtn.frame = view.bounds;
        [view addSubview:maskBtn];
        
        [view.layer addSublayer:self.palyLayer];
        [player play];
        self.isAlreadlyStartPlaying = YES;
        if (@available(iOS 10.0, *)) {
            [player addObserver:self forKeyPath:@"timeControlStatus" options:NSKeyValueObservingOptionNew context:nil];
        }
    
       __weak typeof(self)weakSelf = self;
       self.listenObj = [player addPeriodicTimeObserverForInterval:CMTimeMakeWithSeconds(1, NSEC_PER_SEC) queue:NULL usingBlock:^(CMTime time) {
    
            CGFloat progress = CMTimeGetSeconds(player.currentItem.currentTime) / CMTimeGetSeconds(player.currentItem.duration);
           
           if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(player:playProgress:)]) {
               [weakSelf.delegate player:weakSelf.player playProgress:progress];
           }
           
            if (progress == 1.0f) {
                if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(playfinish:)]) {
                    [weakSelf.delegate playfinish:weakSelf.player];
                }
            }
        }];
    }
    - (void)touchedVideo{
       
        if (_delegate && [_delegate respondsToSelector:@selector(touchInsideVideoLayer:)]) {
             [_delegate touchInsideVideoLayer:_player];
        }
    }
    
    - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
        
        if (object == _player && [keyPath isEqualToString:@"timeControlStatus"]) {
            
                AVPlayerTimeControlStatus status = [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
                if (status ==  AVPlayerTimeControlStatusPaused) {
                    _status = ZKRBaiWeiAVPlayerStatusPause;
                }
                
                if (status == AVPlayerTimeControlStatusWaitingToPlayAtSpecifiedRate) {
                    _status = ZKRBaiWeiAVPlayerStatusReadyToPlay;
                }
                
                if (status ==  AVPlayerTimeControlStatusPlaying) {
                    _status = ZKRBaiWeiAVPlayerStatusPlaying;
                }
                if (_delegate && [_delegate respondsToSelector:@selector(player:playStatusChanged:)]) {
                    [_delegate player:_player playStatusChanged:_status];
                }
            }
    }
    
    - (void)playPause{
        if (_player) {
            [_player pause];
        }
    }
    
    - (void)removePlayLayer{
        
        [self playPause];
        
        [_palyLayer removeFromSuperlayer];
        [_player removeTimeObserver:_listenObj];
        _listenObj = nil;
        _player = nil;
        _palyLayer = nil;
        [_maskBtn removeFromSuperview];
        _maskBtn = nil;
        self.isAlreadlyStartPlaying = NO;
    }
    @end
    
    

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          本文标题:iOS实现图片内容扭曲效果

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