Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  SVIndefiniteAnimatedView.m
+//  SVProgressHUD
+//
+//  Created by Guillaume Campagna on 2014-12-05.
+//
+//
+
+#import "SVIndefiniteAnimatedView.h"
+
+#pragma mark SVIndefiniteAnimatedView
+
+@interface SVIndefiniteAnimatedView ()
+
+@property (nonatomic, strong) CAShapeLayer *indefiniteAnimatedLayer;
+
+@end
+
+@implementation SVIndefiniteAnimatedView
+
+- (void)willMoveToSuperview:(UIView *)newSuperview {
+    if (newSuperview) {
+        [self layoutAnimatedLayer];
+    } else {
+        [_indefiniteAnimatedLayer removeFromSuperlayer];
+        _indefiniteAnimatedLayer = nil;
+    }
+}
+
+- (void)layoutAnimatedLayer {
+    CALayer *layer = self.indefiniteAnimatedLayer;
+    
+    [self.layer addSublayer:layer];
+    layer.position = CGPointMake(CGRectGetWidth(self.bounds) - CGRectGetWidth(layer.bounds) / 2, CGRectGetHeight(self.bounds) - CGRectGetHeight(layer.bounds) / 2);
+}
+
+- (CAShapeLayer*)indefiniteAnimatedLayer {
+    if(!_indefiniteAnimatedLayer) {
+        CGPoint arcCenter = CGPointMake(self.radius+self.strokeThickness/2+5, self.radius+self.strokeThickness/2+5);
+        CGRect rect = CGRectMake(0.0f, 0.0f, arcCenter.x*2, arcCenter.y*2);
+        
+        UIBezierPath* smoothedPath = [UIBezierPath bezierPathWithArcCenter:arcCenter
+                                                                    radius:self.radius
+                                                                startAngle:M_PI*3/2
+                                                                  endAngle:M_PI/2+M_PI*5
+                                                                 clockwise:YES];
+        
+        _indefiniteAnimatedLayer = [CAShapeLayer layer];
+        _indefiniteAnimatedLayer.contentsScale = [[UIScreen mainScreen] scale];
+        _indefiniteAnimatedLayer.frame = rect;
+        _indefiniteAnimatedLayer.fillColor = [UIColor clearColor].CGColor;
+        _indefiniteAnimatedLayer.strokeColor = self.strokeColor.CGColor;
+        _indefiniteAnimatedLayer.lineWidth = self.strokeThickness;
+        _indefiniteAnimatedLayer.lineCap = kCALineCapRound;
+        _indefiniteAnimatedLayer.lineJoin = kCALineJoinBevel;
+        _indefiniteAnimatedLayer.path = smoothedPath.CGPath;
+        
+        CALayer *maskLayer = [CALayer layer];
+        
+        NSBundle *bundle = [NSBundle bundleForClass:self.class];
+        NSURL *url = [bundle URLForResource:@"SVProgressHUD" withExtension:@"bundle"];
+        NSBundle *imageBundle = [NSBundle bundleWithURL:url];
+        NSString *path = [imageBundle pathForResource:@"angle-mask" ofType:@"png"];
+        
+        maskLayer.contents = (id)[[UIImage imageWithContentsOfFile:path] CGImage];;
+        maskLayer.frame = _indefiniteAnimatedLayer.bounds;
+        _indefiniteAnimatedLayer.mask = maskLayer;
+        
+        NSTimeInterval animationDuration = 1;
+        CAMediaTimingFunction *linearCurve = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
+        
+        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
+        animation.fromValue = 0;
+        animation.toValue = [NSNumber numberWithFloat:M_PI*2];
+        animation.duration = animationDuration;
+        animation.timingFunction = linearCurve;
+        animation.removedOnCompletion = NO;
+        animation.repeatCount = INFINITY;
+        animation.fillMode = kCAFillModeForwards;
+        animation.autoreverses = NO;
+        [_indefiniteAnimatedLayer.mask addAnimation:animation forKey:@"rotate"];
+        
+        CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
+        animationGroup.duration = animationDuration;
+        animationGroup.repeatCount = INFINITY;
+        animationGroup.removedOnCompletion = NO;
+        animationGroup.timingFunction = linearCurve;
+        
+        CABasicAnimation *strokeStartAnimation = [CABasicAnimation animationWithKeyPath:@"strokeStart"];
+        strokeStartAnimation.fromValue = @0.015;
+        strokeStartAnimation.toValue = @0.515;
+        
+        CABasicAnimation *strokeEndAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
+        strokeEndAnimation.fromValue = @0.485;
+        strokeEndAnimation.toValue = @0.985;
+        
+        animationGroup.animations = @[strokeStartAnimation, strokeEndAnimation];
+        [_indefiniteAnimatedLayer addAnimation:animationGroup forKey:@"progress"];
+        
+    }
+    return _indefiniteAnimatedLayer;
+}
+
+- (void)setFrame:(CGRect)frame {
+    [super setFrame:frame];
+    
+    if (self.superview) {
+        [self layoutAnimatedLayer];
+    }
+}
+
+- (void)setRadius:(CGFloat)radius {
+    _radius = radius;
+    
+    [_indefiniteAnimatedLayer removeFromSuperlayer];
+    _indefiniteAnimatedLayer = nil;
+    
+    if (self.superview) {
+        [self layoutAnimatedLayer];
+    }
+}
+
+- (void)setStrokeColor:(UIColor *)strokeColor {
+    _strokeColor = strokeColor;
+    _indefiniteAnimatedLayer.strokeColor = strokeColor.CGColor;
+}
+
+- (void)setStrokeThickness:(CGFloat)strokeThickness {
+    _strokeThickness = strokeThickness;
+    _indefiniteAnimatedLayer.lineWidth = _strokeThickness;
+}
+
+- (CGSize)sizeThatFits:(CGSize)size {
+    return CGSizeMake((self.radius+self.strokeThickness/2+5)*2, (self.radius+self.strokeThickness/2+5)*2);
+}
+
+@end