iOS-各類動畫特效

時間  2019-11-19
標籤 ios 各類 動畫 特效 欄目 iOS 简体版
原文   原文鏈接

概述

廣播跑馬燈/彈幕/直播點贊/煙花/雪花等動畫特效, 後續增長~

詳細

代碼下載：http://www.demodashi.com/demo/10674.html

661F567F-3399-4227-ACCD-3C0FB6EB966D.png

1、實現功能

 

  • 1. 廣播跑馬燈html

  • 2. 彈幕動畫dom

  • 3. 直播點贊動畫ide

  • 4. 直播點贊圖片動畫測試

  • 5. 煙花動畫動畫

  • 6. 雪花動畫atom

2、程序實現

1. 廣播動畫特效:spa

思路:代理

1. 初始化廣播視圖orm

2. 設置廣播公告廣告內容htm

3. 添加動畫效果

 

初始化廣播視圖, 廣播活動標題按鈕 與 廣播活動標題標籤 控件大小同樣

/**
 * 設置廣播視圖
 */
- (void)setupBroadcastingView {
    // 設置廣播活動標題按鈕
    UIButton *activityBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    activityBtn.frame = CGRectMake(0, 64, [UIScreen mainScreen].bounds.size.width, 30);
    activityBtn.backgroundColor = [UIColor clearColor];
    [activityBtn addTarget:self action:@selector(activityDetail) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:activityBtn];
    self.activityBtn = activityBtn;
    
    // 設置廣播活動標題文字
    UILabel *activityLb = [[UILabel alloc] init];
    activityLb.frame = activityBtn.bounds;
    [activityLb setFont:[UIFont boldSystemFontOfSize:14]];
    [activityLb setTextColor:[UIColor colorWithRed:115/255.0 green:125/255.0 blue:134/255.0 alpha:1.0]];
    [activityLb setBackgroundColor:[UIColor clearColor]];
    [activityBtn addSubview:activityLb];
    self.activityLb = activityLb;
    
    // 設置廣播logo
    UIImageView *speaker = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"broadcasting"]]];
    speaker.frame = CGRectMake(0, 5, 20, 20);
    speaker.backgroundColor = self.view.backgroundColor;
    [activityBtn addSubview:speaker];
    
    // 設置廣播公告廣告內容
    [self setActivityButtonTitle];
}

設置廣播公告廣告內容, 這裏是以假數據填充,通常需求會是後臺請求得來的活動內容.

添加動畫效果: 當文字內容超過顯示區域就滾動展現,未超過則居中展現.

/**
 * 設置廣播公告廣告內容
 */
- (void)setActivityButtonTitle {
    
    // 廣播公告廣告內容(假數據)
    NSString *title = @"廣播公告廣告內容(ZL測試內容)廣播公告廣告內容(測試內容)\r\n廣播公告廣告內容(測試內容)廣播公告廣告內容(測試內容)廣播公告廣告內容(測試內容)";
    
    title = [title stringByReplacingOccurrencesOfString:@"\r\n" withString:@" "];
    
    [self.activityLb setText:title];
    
    [self.activityLb sizeToFit];
    
    if (self.activityLb.frame.size.width <= self.activityBtn.frame.size.width) {
        
        [self.activityLb setCenter:CGPointMake(self.activityBtn.frame.size.width/2, self.activityBtn.frame.size.height/2)];
        
    } else { // 當文字內容超過顯示區域就滾動展現
        
        CGRect frame = self.activityLb.frame;
        frame.origin.x = self.activityBtn.frame.size.width;
        frame.origin.y = self.activityBtn.frame.size.height * 0.5 - self.activityLb.bounds.size.height * 0.5;
        self.activityLb.frame = frame;
        
        [UIView beginAnimations:@"testAnimation" context:NULL];
        [UIView setAnimationDuration:frame.size.width/55.f];
        [UIView setAnimationCurve:UIViewAnimationCurveLinear];
        [UIView setAnimationRepeatAutoreverses:NO];
        [UIView setAnimationRepeatCount:INT_MAX];
        
        frame = self.activityLb.frame;
        frame.origin.x = - frame.size.width;
        self.activityLb.frame = frame;
        [UIView commitAnimations];
    }
}

當有活動連接時,須要添加點擊效果; 若是沒則不須要建立按鈕及點擊效果.

// 展現活動詳情
- (void)activityDetail {
    
    NSLog(@"點擊了廣播活動公告詳情");
}

廣播跑馬燈.gif

 

 

2. 彈幕動畫特效:

 

先自定義彈幕標籤ZLScrollLabelView:

.h 文件露出開始/中止/暫停/恢復彈幕動畫

@interface ZLScrollLabelView : UIView
// 代理協議
@property (nonatomic, weak) id <ZLScrollLabelViewDelegate> delegate;
// 速度
@property (nonatomic) CGFloat speed;
// 方向
@property (nonatomic) ScrollDirectionType barrageDirection;
// 容器
- (void)addContentView:(UIView *)view;
// 開始
- (void)startAnimation;
// 中止
- (void)stopAnimation;
// 暫停
- (void)pauseAnimation;
// 恢復
- (void)resumeAnimation;
@end

.m 文件初始化:

- (instancetype)initWithFrame:(CGRect)frame {
    
    if (self = [super initWithFrame:frame]) {
        
        _width = frame.size.width;
        _height = frame.size.height;
        
        self.speed = 1.f;
        self.barrageDirection = FromLeftType;
        self.layer.masksToBounds = YES;
        self.animationView = [[UIView alloc] initWithFrame:CGRectMake(_width, 0, _width, _height)];
        [self addSubview:self.animationView];
    }
    
    return self;
}
- (void)addContentView:(UIView *)view {
    
    [_contentView removeFromSuperview];
    
    view.frame = view.bounds;
    _contentView = view;
    self.animationView.frame = view.bounds;
    [self.animationView addSubview:_contentView];
    
    _animationViewWidth = self.animationView.frame.size.width;
    _animationViewHeight = self.animationView.frame.size.height;
}

開始彈幕動畫:

- (void)startAnimation {
    
    [self.animationView.layer removeAnimationForKey:@"animationViewPosition"];
    _stoped = NO;
    
    CGPoint pointRightCenter = CGPointMake(_width + _animationViewWidth / 2.f, _animationViewHeight / 2.f);
    CGPoint pointLeftCenter  = CGPointMake(-_animationViewWidth / 2, _animationViewHeight / 2.f);
    CGPoint fromPoint = self.barrageDirection == FromLeftType ? pointRightCenter : pointLeftCenter;
    CGPoint toPoint = self.barrageDirection == FromLeftType ? pointLeftCenter  : pointRightCenter;
    
    self.animationView.center = fromPoint;
    UIBezierPath *movePath = [UIBezierPath bezierPath];
    [movePath moveToPoint:fromPoint];
    [movePath addLineToPoint:toPoint];
    
    CAKeyframeAnimation *moveAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    moveAnimation.path = movePath.CGPath;
    moveAnimation.removedOnCompletion = YES;
    moveAnimation.duration = _animationViewWidth / 30.f * (1 / self.speed);
    moveAnimation.delegate = self;
    [self.animationView.layer addAnimation:moveAnimation forKey:@"animationViewPosition"];
}

中止彈幕動畫:

- (void)stopAnimation {
    
    _stoped = YES;
    [self.animationView.layer removeAnimationForKey:@"animationViewPosition"];
}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
    
    if (self.delegate && [self.delegate respondsToSelector:@selector(barrageView:animationDidStopFinished:)]) {
        
        [self.delegate barrageView:self animationDidStopFinished:flag];
    }
    
    if (flag && !_stoped) {
        
        [self startAnimation];
    }
}

暫停彈幕動畫:

- (void)pauseAnimation {
    
    [self pauseLayer:self.animationView.layer];
}

- (void)pauseLayer:(CALayer*)layer {
    
    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];
    layer.speed = 0.0;
    layer.timeOffset = pausedTime;
}

恢復彈幕動畫:

- (void)resumeAnimation {
    
    [self resumeLayer:self.animationView.layer];
}

- (void)resumeLayer:(CALayer*)layer {
    
    CFTimeInterval pausedTime = layer.timeOffset;
    layer.speed = 1.0;
    layer.timeOffset = 0.0;
    layer.beginTime = 0.0;
    CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;
    layer.beginTime = timeSincePause;
}

在所需控制器裏, 添加代理ZLScrollLabelViewDelegate實現開始動畫方法

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.title = @"彈幕動畫";
    self.view.backgroundColor = [UIColor grayColor];
    
    ZLScrollLabelView *barrageView0 = [[ZLScrollLabelView alloc] initWithFrame:CGRectMake(0, 104, self.view.frame.size.width, 20)];
    barrageView0.delegate = self;
    // add
    [self.view addSubview:barrageView0];
    // text
    [barrageView0 addContentView:[self createLabelWithText:@"超喜歡趙麗穎,只因她的踏實!"
                                                     textColor:[self randomColor]]];
    // start
    [barrageView0 startAnimation];
}

代理ZLScrollLabelViewDelegate:

- (UILabel *)createLabelWithText:(NSString *)text textColor:(UIColor *)textColor {
    
    NSString *string = [NSString stringWithFormat:@" %@ ", text];
    CGFloat width = [string widthWithStringAttribute:@{NSFontAttributeName : [UIFont systemFontOfSize:14.f]}];
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, width, 20)];
    label.font = [UIFont systemFontOfSize:14.f];
    label.text = string;
    label.textColor = textColor;
    return label;
}

#pragma mark - ZLScrollLabelViewDelegate

- (void)barrageView:(ZLScrollLabelView *)barrageView animationDidStopFinished:(BOOL)finished {
    
    [barrageView stopAnimation];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [barrageView addContentView:[self createLabelWithText:[self randomString]
                                                        textColor:[self randomColor]]];
        [barrageView startAnimation];
    });
}

- (NSString *)randomString {
    
    NSArray *array = @[@"猜猜我是誰?",
                       @"哈哈",
                       @"猜不着吧",
                       @"我是程序媛",
                       @"嚕啦啦啦啦~"];
    return array[arc4random() % array.count];
}

彈幕動畫.gif

 

3. 直播點贊效果

先自定義ZLLiveHeartView,露出liveHeartAnimateInView方法:

- (void)liveHeartAnimateInView:(UIView *)view {
    
    NSTimeInterval totalAnimationDuration = 8;
    CGFloat heartSize = CGRectGetWidth(self.bounds);
    CGFloat heartCenterX = self.center.x;
    CGFloat viewHeight = CGRectGetHeight(view.bounds);
    
    // Pre-Animation setup
    self.transform = CGAffineTransformMakeScale(0, 0);
    self.alpha = 0;
    
    // Bloom
    [UIView animateWithDuration:0.5 delay:0.0 usingSpringWithDamping:0.6 initialSpringVelocity:0.8 options:UIViewAnimationOptionCurveEaseOut animations:^{
        self.transform = CGAffineTransformIdentity;
        self.alpha = 0.9;
    } completion:NULL];
    
    NSInteger i = arc4random_uniform(2);
    // -1 OR 1
    NSInteger rotationDirection = 1 - (2 * i);
    NSInteger rotationFraction = arc4random_uniform(10);
    [UIView animateWithDuration:totalAnimationDuration animations:^{
        self.transform = CGAffineTransformMakeRotation(rotationDirection * M_PI / (16 + rotationFraction * 0.2));
    } completion:NULL];
    
    UIBezierPath *heartTravelPath = [UIBezierPath bezierPath];
    [heartTravelPath moveToPoint:self.center];
    
    // random end point
    CGPoint endPoint = CGPointMake(heartCenterX + (rotationDirection) * arc4random_uniform(2 * heartSize), viewHeight/6.0 + arc4random_uniform(viewHeight / 4.0));
    
    // random Control Points
    NSInteger j = arc4random_uniform(2);
    NSInteger travelDirection = 1- (2*j);
    
    // randomize x and y for control points
    CGFloat xDelta = (heartSize/2.0 + arc4random_uniform(2*heartSize)) * travelDirection;
    CGFloat yDelta = MAX(endPoint.y ,MAX(arc4random_uniform(8*heartSize), heartSize));
    CGPoint controlPoint1 = CGPointMake(heartCenterX + xDelta, viewHeight - yDelta);
    CGPoint controlPoint2 = CGPointMake(heartCenterX - 2*xDelta, yDelta);
    
    [heartTravelPath addCurveToPoint:endPoint controlPoint1:controlPoint1 controlPoint2:controlPoint2];
    
    CAKeyframeAnimation *keyFrameAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    keyFrameAnimation.path = heartTravelPath.CGPath;
    keyFrameAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    keyFrameAnimation.duration = totalAnimationDuration + endPoint.y/viewHeight;
    [self.layer addAnimation:keyFrameAnimation forKey:@"positionOnPath"];
    
    // Alpha & remove from superview
    [UIView animateWithDuration:totalAnimationDuration animations:^{
        self.alpha = 0.0;
    } completion:^(BOOL finished) {
        [self removeFromSuperview];
    }];
    
}
- (void)drawRect:(CGRect)rect {
    
    [_strokeColor setStroke];
    [_fillColor setFill];
    
    CGFloat drawingPadding = 4.0;
    CGFloat curveRadius = floor((CGRectGetWidth(rect) - 2*drawingPadding) / 4.0);
    
    // Creat path
    UIBezierPath *heartPath = [UIBezierPath bezierPath];
    
    // Start at bottom heart tip
    CGPoint tipLocation = CGPointMake(floor(CGRectGetWidth(rect) / 2.0), CGRectGetHeight(rect) - drawingPadding);
    [heartPath moveToPoint:tipLocation];
    
    // Move to top left start of curve
    CGPoint topLeftCurveStart = CGPointMake(drawingPadding, floor(CGRectGetHeight(rect) / 2.4));
    
    [heartPath addQuadCurveToPoint:topLeftCurveStart controlPoint:CGPointMake(topLeftCurveStart.x, topLeftCurveStart.y + curveRadius)];
    
    // Create top left curve
    [heartPath addArcWithCenter:CGPointMake(topLeftCurveStart.x + curveRadius, topLeftCurveStart.y) radius:curveRadius startAngle:M_PI endAngle:0 clockwise:YES];
    
    // Create top right curve
    CGPoint topRightCurveStart = CGPointMake(topLeftCurveStart.x + 2*curveRadius, topLeftCurveStart.y);
    [heartPath addArcWithCenter:CGPointMake(topRightCurveStart.x + curveRadius, topRightCurveStart.y) radius:curveRadius startAngle:M_PI endAngle:0 clockwise:YES];
    
    // Final curve to bottom heart tip
    CGPoint topRightCurveEnd = CGPointMake(topLeftCurveStart.x + 4*curveRadius, topRightCurveStart.y);
    [heartPath addQuadCurveToPoint:tipLocation controlPoint:CGPointMake(topRightCurveEnd.x, topRightCurveEnd.y + curveRadius)];
    
    [heartPath fill];
    heartPath.lineWidth = 1;
    heartPath.lineCapStyle = kCGLineCapRound;
    heartPath.lineJoinStyle = kCGLineCapRound;
    [heartPath stroke];
}

再在所需控制器裏添加ZLLiveHeartView.

- (void)showLiveHeartView {
    
    ZLLiveHeartView *heart = [[ZLLiveHeartView alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
    [self.view addSubview:heart];
    CGPoint fountainSource = CGPointMake(self.view.frame.size.width - 80, self.view.bounds.size.height - 30 / 2.0 - 10);
    heart.center = fountainSource;
    [heart liveHeartAnimateInView:self.view];
}

直播點贊動畫.gif

 

4. 直播圖片點贊動畫

先自定義ZLLikeAnimation,animatePictureInView方法:

- (void)animatePictureInView:(UIView *)view Image:(UIImage *)image {
    
    self.imageView.image = image;
    NSTimeInterval totalAnimationDuration = 8;
    CGFloat heartSize = CGRectGetWidth(self.bounds);
    CGFloat heartCenterX = self.center.x;
    CGFloat viewHeight = CGRectGetHeight(view.bounds);
    
    // Pre-Animation setup
    self.transform = CGAffineTransformMakeScale(0, 0);
    self.alpha = 0;
    
    // Bloom
    [UIView animateWithDuration:0.5 delay:0.0 usingSpringWithDamping:0.6 initialSpringVelocity:0.8 options:UIViewAnimationOptionCurveEaseOut animations:^{
        self.transform = CGAffineTransformIdentity;
        self.alpha = 0.9;
    } completion:NULL];
    
    NSInteger i = arc4random_uniform(2);
    // -1 OR 1
    NSInteger rotationDirection = 1 - (2 * i);
    NSInteger rotationFraction = arc4random_uniform(10);
    [UIView animateWithDuration:totalAnimationDuration animations:^{
        self.transform = CGAffineTransformMakeRotation(rotationDirection * M_PI / (16 + rotationFraction * 0.2));
    } completion:NULL];
    
    UIBezierPath *heartTravelPath = [UIBezierPath bezierPath];
    [heartTravelPath moveToPoint:self.center];
    
    // random end point
    CGPoint endPoint = CGPointMake(heartCenterX + (rotationDirection) * arc4random_uniform(2 * heartSize), viewHeight/6.0 + arc4random_uniform(viewHeight / 4.0));
    
    // random Control Points
    NSInteger j = arc4random_uniform(2);
    NSInteger travelDirection = 1 - (2 * j);
    
    // randomize x and y for control points
    CGFloat xDelta = (heartSize / 2.0 + arc4random_uniform(2 * heartSize)) * travelDirection;
    CGFloat yDelta = MAX(endPoint.y ,MAX(arc4random_uniform(8 * heartSize), heartSize));
    CGPoint controlPoint1 = CGPointMake(heartCenterX + xDelta, viewHeight - yDelta);
    CGPoint controlPoint2 = CGPointMake(heartCenterX - 2 * xDelta, yDelta);
    
    [heartTravelPath addCurveToPoint:endPoint controlPoint1:controlPoint1 controlPoint2:controlPoint2];
    
    CAKeyframeAnimation *keyFrameAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    keyFrameAnimation.path = heartTravelPath.CGPath;
    keyFrameAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    keyFrameAnimation.duration = totalAnimationDuration + endPoint.y / viewHeight;
    [self.layer addAnimation:keyFrameAnimation forKey:@"positionOnPath"];
    
    // Alpha & remove from superview
    [UIView animateWithDuration:totalAnimationDuration animations:^{
        self.alpha = 0.0;
    } completion:^(BOOL finished) {
        [self removeFromSuperview];
    }];
    
}

再在所需控制器裏添加ZLLikeAnimation.

- (void)showLikePictureView {
    
    ZLLikeAnimation *heart = [[ZLLikeAnimation alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
    [self.view addSubview:heart];
    CGPoint fountainSource = CGPointMake(self.view.frame.size.width - 80, self.view.bounds.size.height - 30 / 2.0 - 10);
    heart.center = fountainSource;
    int count = round(random() % 12);
    [heart animatePictureInView:self.view Image:[UIImage imageNamed:[NSString stringWithFormat:@"resource.bundle/heart%d.png",count]]];
}

直播點贊圖片動畫.gif

 

5. 煙花特效:

設置煙花

- (void)setupFireworks {
    
    self.caELayer = [CAEmitterLayer layer];
    
    // 發射源
    self.caELayer.emitterPosition = CGPointMake(self.view.frame.size.width / 2, self.view.frame.size.height - 50);
    // 發射源尺寸大小
    self.caELayer.emitterSize = CGSizeMake(50, 0);
    // 發射源模式
    self.caELayer.emitterMode = kCAEmitterLayerOutline;
    // 發射源的形狀
    self.caELayer.emitterShape = kCAEmitterLayerLine;
    // 渲染模式
    self.caELayer.renderMode = kCAEmitterLayerAdditive;
    // 發射方向
    self.caELayer.velocity = 1;
    // 隨機產生粒子
    self.caELayer.seed = (arc4random() % 100) + 1;
    
    // cell
    CAEmitterCell *cell = [CAEmitterCell emitterCell];
    // 速率
    cell.birthRate = 1.0;
    // 發射的角度
    cell.emissionRange = 0.11 * M_PI;
    // 速度
    cell.velocity = 300;
    // 範圍
    cell.velocityRange = 150;
    // Y軸 加速度份量
    cell.yAcceleration = 75;
    // 聲明週期
    cell.lifetime  = 2.04;
    // 是個CGImageRef的對象,既粒子要展示的圖片
    cell.contents = (id)[[UIImage imageNamed:@"ring"] CGImage];
    // 縮放比例
    cell.scale = 0.2;
    // 粒子的顏色
    cell.color = [[UIColor colorWithRed:0.6 green:0.6 blue:0.6 alpha:1.0] CGColor];
    // 一個粒子的顏色green 能改變的範圍
    cell.greenRange = 1.0;
    // 一個粒子的顏色red 能改變的範圍
    cell.redRange = 1.0;
    // 一個粒子的顏色blue 能改變的範圍
    cell.blueRange = 1.0;
    // 子旋轉角度範圍
    cell.spinRange = M_PI;
    
    // 爆炸
    CAEmitterCell *burst = [CAEmitterCell emitterCell];
    // 粒子產生係數
    burst.birthRate = 1.0;
    // 速度
    burst.velocity = 0;
    // 縮放比例
    burst.scale = 2.5;
    // shifting粒子red在生命週期內的改變速度
    burst.redSpeed = -1.5;
    // shifting粒子blue在生命週期內的改變速度
    burst.blueSpeed= +1.5;
    // shifting粒子green在生命週期內的改變速度
    burst.greenSpeed = +1.0;
    // 生命週期
    burst.lifetime = 0.35;
    
    
    // 火花 and finally, the sparks
    CAEmitterCell *spark = [CAEmitterCell emitterCell];
    // 粒子產生係數，默認爲1.0
    spark.birthRate = 400;
    // 速度
    spark.velocity = 125;
    // 360 deg //周圍發射角度
    spark.emissionRange = 2 * M_PI;
    // gravity //y方向上的加速度份量
    spark.yAcceleration = 75;
    // 粒子生命週期
    spark.lifetime = 3;
    // 是個CGImageRef的對象,既粒子要展示的圖片
    spark.contents = (id)
    [[UIImage imageNamed:@"fireworks"] CGImage];
    // 縮放比例速度
    spark.scaleSpeed = -0.2;
    // 粒子green在生命週期內的改變速度
    spark.greenSpeed = -0.1;
    // 粒子red在生命週期內的改變速度
    spark.redSpeed = 0.4;
    // 粒子blue在生命週期內的改變速度
    spark.blueSpeed = -0.1;
    // 粒子透明度在生命週期內的改變速度
    spark.alphaSpeed = -0.25;
    // 子旋轉角度
    spark.spin = 2 * M_PI;
    // 子旋轉角度範圍
    spark.spinRange = 2 * M_PI;
    
    self.caELayer.emitterCells = [NSArray arrayWithObject:cell];
    cell.emitterCells = [NSArray arrayWithObjects:burst, nil];
    burst.emitterCells = [NSArray arrayWithObject:spark];
    [self.view.layer addSublayer:self.caELayer];
}

煙花效果.gif

 

6. 雪花特效:

設置雪花

- (void)setupSnowflake {
    
    // 建立粒子Layer
    CAEmitterLayer *snowEmitter = [CAEmitterLayer layer];
    
    // 粒子發射位置
    snowEmitter.emitterPosition = CGPointMake(120,0);
    
    // 發射源的尺寸大小
    snowEmitter.emitterSize = self.view.bounds.size;
    
    // 發射模式
    snowEmitter.emitterMode = kCAEmitterLayerSurface;
    
    // 發射源的形狀
    snowEmitter.emitterShape = kCAEmitterLayerLine;
    
    // 建立雪花類型的粒子
    CAEmitterCell *snowflake = [CAEmitterCell emitterCell];
    
    // 粒子的名字
    snowflake.name = @"snow";
    
    // 粒子參數的速度乘數因子
    snowflake.birthRate = 20.0;
    snowflake.lifetime = 120.0;
    
    // 粒子速度
    snowflake.velocity = 10.0;
    
    // 粒子的速度範圍
    snowflake.velocityRange = 10;
    
    // 粒子y方向的加速度份量
    snowflake.yAcceleration = 2;
    
    // 周圍發射角度
    snowflake.emissionRange = 0.5 * M_PI;
    
    // 子旋轉角度範圍
    snowflake.spinRange = 0.25 * M_PI;
    snowflake.contents  = (id)[[UIImage imageNamed:@"snow"] CGImage];
    
    // 設置雪花形狀的粒子的顏色
    snowflake.color = [[UIColor whiteColor] CGColor];
    snowflake.redRange = 1.5f;
    snowflake.greenRange = 2.2f;
    snowflake.blueRange = 2.2f;
    
    snowflake.scaleRange = 0.6f;
    snowflake.scale = 0.7f;
    
    snowEmitter.shadowOpacity = 1.0;
    snowEmitter.shadowRadius = 0.0;
    snowEmitter.shadowOffset = CGSizeMake(0.0, 0.0);
    
    // 粒子邊緣的顏色
    snowEmitter.shadowColor = [[UIColor whiteColor] CGColor];
    
    // 添加粒子
    snowEmitter.emitterCells = @[snowflake];
    
    // 將粒子Layer添加進圖層中
    [self.view.layer addSublayer:snowEmitter];
    
    // 造成遮罩
    UIImage *image = [UIImage imageNamed:@"alpha"];
    _layer = [CALayer layer];
    _layer.frame = (CGRect){CGPointZero, self.view.bounds.size};
    _layer.contents = (__bridge id)(image.CGImage);
    _layer.position = self.view.center;
    snowEmitter.mask = _layer;
}

雪花效果.gif

3、壓縮文件截圖

一、壓縮文件截圖

C13A68F1-C6FC-492B-A7DC-B0D28285B032.png

2.項目截圖:

0E1F6A16-FEC9-4B57-9D09-C1F268860182.png

4、其餘補充

持續更新添加動畫特效~

界面性問題能夠根據本身項目需求調整便可, 具體可參考代碼, 項目可以直接運行!

 

 

代碼下載：http://www.demodashi.com/demo/10674.html

注：本文著做權歸做者，由demo大師發表，拒絕轉載，轉載須要做者受權

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