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#import "ProgressView.h"
#import "UIKitCategories.h"
@interface ProgressView ()
@property (nonatomic) CAShapeLayer * progressLayer;
@property (nonatomic) CAShapeLayer * backgroundCircleLayer;
@property (nonatomic) CAShapeLayer * stopRectLayer;
@property (nonatomic) UIImageView * startTriangleView;
@property (nonatomic) UIButton * button;
@property (nonatomic) NSNumber * nextProgressToAnimate;
@end
@implementation ProgressView
#define CIRCLE_RADIUS 18
- (instancetype)init
{
self = [super initWithFrame:CGRectMake(0, 0, 44, 44)];
[self.layer addSublayer:self.backgroundCircleLayer];
[self.layer addSublayer:self.progressLayer];
[self.layer addSublayer:self.stopRectLayer];
[self addSubview:self.startTriangleView];
self.startTriangleView.center = CGPointMake(self.width / 2 + 1, self.height / 2);
[self addSubview:self.button];
[self setProgress:0 animated:NO];
return self;
}
- (void)buttonPressed:(id)sender
{
if (self.failedMode)
[self.delegate progressViewDidStart:self];
else
[self.delegate progressViewDidCancel:self];
}
- (CGFloat)angleWithProgress:(double)progress
{
return 2 * M_PI * progress - M_PI_2;
}
NSString * const CircleAnimationKey = @"CircleAnimation";
- (void)setProgress:(double)progress animated:(BOOL)animated
{
if ([self.progressLayer animationForKey:CircleAnimationKey])
{
self.nextProgressToAnimate = @(progress);
}
else
{
self.nextProgressToAnimate = nil;
CGPoint const center = CGPointMake(self.width / 2, self.height / 2);
CGFloat const radius = CIRCLE_RADIUS - self.progressLayer.lineWidth;
UIBezierPath * path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:[self angleWithProgress:0] endAngle:[self angleWithProgress:progress] clockwise:YES];
if (animated)
{
self.progressLayer.path = path.CGPath;
CABasicAnimation * animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
animation.duration = 0.3;
animation.repeatCount = 1;
animation.fromValue = @(_progress / progress);
animation.toValue = @1;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.delegate = self;
[self.progressLayer addAnimation:animation forKey:CircleAnimationKey];
}
else
{
self.progressLayer.path = path.CGPath;
}
_progress = progress;
}
}
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
if (self.nextProgressToAnimate)
[self setProgress:[self.nextProgressToAnimate doubleValue] animated:YES];
}
- (CGColorRef)redColor
{
return [UIColor colorWithColorCode:@"FF4436"].CGColor;
}
- (CGColorRef)blueColor
{
return [UIColor colorWithColorCode:@"0585FF"].CGColor;
}
- (void)setFailedMode:(BOOL)failedMode
{
_failedMode = failedMode;
self.progressLayer.strokeColor = failedMode ? [self redColor] : [self blueColor];
self.stopRectLayer.hidden = failedMode;
self.startTriangleView.hidden = !failedMode;
}
- (UIButton *)button
{
if (!_button)
{
_button = [[UIButton alloc] initWithFrame:self.bounds];
[_button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
}
return _button;
}
- (CAShapeLayer *)stopRectLayer
{
if (!_stopRectLayer)
{
_stopRectLayer = [CAShapeLayer layer];
CGFloat const side = 11;
CGRect const rect = CGRectMake((self.width - side) / 2, (self.width - side) / 2, side, side);
_stopRectLayer.fillColor = [self blueColor];
_stopRectLayer.path = [UIBezierPath bezierPathWithRoundedRect:rect cornerRadius:2].CGPath;
}
return _stopRectLayer;
}
- (UIImageView *)startTriangleView
{
if (!_startTriangleView)
_startTriangleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"ProgressTriangle"]];
return _startTriangleView;
}
- (CAShapeLayer *)backgroundCircleLayer
{
if (!_backgroundCircleLayer)
{
_backgroundCircleLayer = [CAShapeLayer layer];
_backgroundCircleLayer.fillColor = [UIColor clearColor].CGColor;
_backgroundCircleLayer.lineWidth = 2;
_backgroundCircleLayer.strokeColor = [[UIColor colorWithColorCode:@"F0F0F0"] CGColor];
_backgroundCircleLayer.shouldRasterize = YES;
_backgroundCircleLayer.rasterizationScale = 2 * [UIScreen mainScreen].scale;
CGRect rect = CGRectMake(self.width / 2 - CIRCLE_RADIUS, self.height / 2 - CIRCLE_RADIUS, 2 * CIRCLE_RADIUS, 2 * CIRCLE_RADIUS);
rect = CGRectInset(rect, _backgroundCircleLayer.lineWidth, _backgroundCircleLayer.lineWidth);
_backgroundCircleLayer.path = [UIBezierPath bezierPathWithOvalInRect:rect].CGPath;
}
return _backgroundCircleLayer;
}
- (CAShapeLayer *)progressLayer
{
if (!_progressLayer)
{
_progressLayer = [CAShapeLayer layer];
_progressLayer.fillColor = [UIColor clearColor].CGColor;
_progressLayer.lineWidth = 3;
_progressLayer.shouldRasterize = YES;
_progressLayer.rasterizationScale = 2 * [UIScreen mainScreen].scale;
}
return _progressLayer;
}
@end
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