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OC 实现扫雷达扫描动画

先上效果如下:忽略CSDN动画显示效果严重下降,导致下面动画不流畅。

上代码:

typedef NS_ENUM(NSInteger,UISpinnerAnimationViewAnimation) {     UISpinnerAnimationViewAnimationSpinner,//拖尾绕圈     UISpinnerAnimationViewAnimationRador,  //雷达 };  @interface UISpinnerAnimationView : UIView  ///画笔厚度默认为6 @property (nonatomic,assign) CGFloat lineWidth; ///画笔轮廓颜色 @property (nonatomic,label) UIColor *strokeColor; //填充颜色,如果使用雷达效果配置填充颜色 @property (nonatomic,label) UIColor *fillColor;  /* An object providing the contents of the layer, typically a CGImageRef  * or an IOSurfaceRef, but may be something else. (For example, NSImage  * objects are supported on Mac OS X 10.6 and later.) Default value is nil.  * Animatable. */ @property (nonatomic,label) UIImage *contentImage;  ///动画完成时间 @property (nonatomic,assign) CGFloat aniDuration;  @property (nonatomic,assign) UISpinnerAnimationViewAnimation animationType;  - (void)startAnimation; - (void)stopAnimation; @end

实现逻辑:

 typedef void (^UIProgressHUDViewCompleteBlock)(void); typedef UIView *(^UIProgressHUDInterfaceViewBlock)(void);  @implementation UISpinnerAnimationView  - (instancetype)initWithFrame:(CGRect)frame {     if ([super initWithFrame:frame])     {         self.lineWidth = 6;         self.strokeColor = [UIColor colorWithRed:2.0/255.0 green:134.0/255.0 blue:224.0/255.0 alpha:1];         self.animationType = UISpinnerAnimationViewAnimationSpinner;                  NSString *imageData = @"iVBORw0KGgoAAAANSUhEUgAAASwAAAEsCAQAAADTdEb AAAgRklEQVR42u2da5skx1GFM2dXMhd/hf/IL0OSEVhYMiBkrgbMHQwG2bqstbqaL8ADlqzVTifd09PbVdV5iThxIqp60c6zM9Pd1ZfpfOfEyZORNTn9R5r/y4PLoyP4l6y3IPevX8oBPwf3fWBdUnOQ08 GDzF6SA/QmIPwPILlDdno1iElB7CSGq1MAg0ZkjV/77MLSn4/q/w4rV4NLx/B8kVrW7/f2wNre3pFoOEE1jbQioDpesDaZlEUXj6DFYdW/LCwSooFrOifhoMcfHkK1nUWwNY9mGWIDVbEa165KM7B v9RAPGByc6/GM9RUVyC5TcD9JsvxQ1T3tivgm/mZcIsp8 uJlywFJZrACvChYUFEAewuA 5hreKUoB8ta/cuwxWcqzP6LReL0zPB1h8yAA 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";
        NSData *data = [[NSData alloc] initWithBase64EncodedString:imageData options:NSDataBase64DecodingIgnoreUnknownCharacters];
        UIImage *image = [UIImage imageWithData:data];
        
        self.contentImage = image;
        self.aniDuration = 1;
        
        [self.layer setMasksToBounds:YES];
        [self.layer setCornerRadius:frame.size.width / 2];
        [self.layer setBorderColor:[UIColor clearColor].CGColor];
    }
    return self;
}


- (void)startAnimation
{
    if (self.animationType == UISpinnerAnimationViewAnimationSpinner)
    {
        [self startSpinerAnimation];
    }
    else if (self.animationType == UISpinnerAnimationViewAnimationRador)
    {
        [self startRadorAnimation];
    }
}


- (void)startSpinerAnimation
{
    CGFloat lineWidth = self.lineWidth;
    CGPoint arcCenter = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 2);
    UIBezierPath *smoothedPath = [UIBezierPath bezierPath];
    [smoothedPath addArcWithCenter:arcCenter radius:self.frame.size.width / 2 startAngle:0 endAngle:2 * M_PI clockwise:YES];
    CAShapeLayer *layer = [CAShapeLayer layer];
    [layer setContentsScale:UIScreen.mainScreen.scale];
    [layer setFrame:CGRectMake(0, 0, arcCenter.x * 2, arcCenter.y * 2)];
    [layer setFillColor:UIColor.clearColor.CGColor];
    [layer setStrokeColor:self.strokeColor.CGColor];
    [layer setLineWidth:lineWidth];
    [layer setLineCap:kCALineCapRound];
    [layer setLineJoin:kCALineJoinBevel];
    [layer setPath:smoothedPath.CGPath];
    [layer setMask:[CALayer layer]];
    layer.mask.contents = (__bridge id _Nullable)(self.contentImage.CGImage);
    [layer.mask setFrame:self.bounds];
    
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    animation.fromValue = [NSNumber numberWithFloat:0.0];
    animation.toValue = [NSNumber numberWithFloat:2 * M_PI];
    animation.duration = self.aniDuration;
    [animation setRemovedOnCompletion:NO];
    animation.repeatCount = HUGE_VALF;
    animation.autoreverses = NO;
    
    [layer addAnimation:animation forKey:@"rotate"];
    
    [self.layer addSublayer:layer];
}


- (void)startRadorAnimation
{
    CGFloat lineWidth = self.lineWidth;
    CGPoint arcCenter = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 2);
    UIBezierPath *smoothedPath = [UIBezierPath bezierPath];
    [smoothedPath addArcWithCenter:arcCenter radius:self.frame.size.width / 2 startAngle:0 endAngle:2 * M_PI clockwise:YES];
    CAShapeLayer *layer = [CAShapeLayer layer];
    [layer setContentsScale:UIScreen.mainScreen.scale];
    [layer setFrame:CGRectMake(0, 0, arcCenter.x * 2, arcCenter.y * 2)];
    [layer setFillColor:self.fillColor.CGColor];
    [layer setStrokeColor:self.strokeColor.CGColor];
    [layer setLineWidth:lineWidth];
    [layer setLineCap:kCALineCapRound];
    [layer setLineJoin:kCALineJoinBevel];
    [layer setPath:smoothedPath.CGPath];
    [layer setMask:[CALayer layer]];
    layer.mask.contents = (__bridge id _Nullable)(self.contentImage.CGImage);
    [layer.mask setFrame:self.bounds];
    
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    animation.fromValue = [NSNumber numberWithFloat:0.0];
    animation.toValue = [NSNumber numberWithFloat:2 * M_PI];
    animation.duration = self.aniDuration;
    [animation setRemovedOnCompletion:NO];
    animation.repeatCount = HUGE_VALF;
    animation.autoreverses = NO;
    
    [layer addAnimation:animation forKey:@"rotate"];
    [self setBackgroundColor:self.fillColor];
    [self.layer addSublayer:layer];
}


- (void)stopAnimation
{
    dispatch_async(dispatch_get_main_queue(), ^{
        [[self.layer sublayers] enumerateObjectsUsingBlock:^(__kindof CALayer * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            [obj removeAllAnimations];
        }];
    });
}

@end

使用方法:

CGFloat sz = MIN(self.view.bounds.size.width, self.view.bounds.size.height)/2;
    CGRect ft = CGRectMake((self.view.bounds.size.width-sz)/2, 120, sz, sz);
    UISpinnerAnimationView *c1View = [[UISpinnerAnimationView alloc] initWithFrame:ft];
    [c1View.layer setMasksToBounds:YES];
    [c1View.layer setCornerRadius:sz/2];
    [c1View setAnimationType:UISpinnerAnimationViewAnimationRador];
    [c1View setFillColor:[UIColor colorWithRed:2.0/255.0 green:134.0/255.0 blue:224.0/255.0 alpha:0.65]];
    [self.view addSubview:c1View];
    
    [c1View startAnimation];

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