- (void)drawRect:(CGRect)rect{
CGContextRef context = UIGraphicsGetCurrentContext();
CGRect aRect= CGRectMake(20,20, 160, 160);
CGContextSetRGBStrokeColor(context, 236/255.0, 236/255.0, 236/255.0, 1.0);
CGContextSetLineWidth(context, 30.0);
CGColorRef shadowColor = [UIColor blackColor].CGColor;
//控制圖形陰影顏色
CGContextSetShadowWithColor(context, CGSizeMake(1, 0), 4, shadowColor);
CGContextAddEllipseInRect(context, aRect); //圓環
CGContextDrawPath(context, kCGPathStroke);
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width,self.frame.size.height)];
label.textAlignment = NSTextAlignmentCenter;
label.numberOfLines = 3;
NSString * contentStr= @" 75%\n7500\n10000";
NSRange rang = [contentStr rangeOfString:@"%"];
NSMutableAttributedString *textStr = [[NSMutableAttributedString alloc] initWithString:contentStr];
UIColor * color = [[UIColor alloc]initWithRed:228/255.0 green:190/255.0 blue:52/255.0 alpha:1];
[textStr addAttribute:NSForegroundColorAttributeName value:color range:NSMakeRange(0,rang.location +1)];
[textStr addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Bold" size:30.0] range:NSMakeRange(0,rang.location +1)];
[textStr addAttribute:NSForegroundColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(rang.location + 1,contentStr.length - rang.location -1 )];
label.attributedText = textStr;
//? ? ? ? label.text = @"75%\n7500\n10000";
label.backgroundColor = [UIColor clearColor];
[self addSubview:label];
_progressLayer = [CAShapeLayer new];
[self.layer addSublayer:_progressLayer];
_progressLayer.fillColor = nil;
_progressLayer.lineCap = kCALineCapRound;
_progressLayer.frame = self.bounds;
//默認5
self.progressWidth = 5;
}
return self;
}
- (void)setProgress
{
_progressPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(self.frame.size.width/2,self.frame.size.height/2) radius:84 startAngle:- M_PI_2 endAngle:(M_PI * 2) * _progress - M_PI_2 clockwise:YES];
_progressLayer.path = _progressPath.CGPath;
CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
pathAnimation.duration = 1.0;
pathAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
pathAnimation.fromValue = @0.0f;
pathAnimation.toValue = @1.0f;
[_progressLayer addAnimation:pathAnimation forKey:nil];
_progressLayer.strokeEnd = 1.0;
}
- (void)setProgressWidth:(float)progressWidth
{
_progressWidth = progressWidth;
_progressLayer.lineWidth = _progressWidth;
[self setProgress];
}
- (void)setProgressColor:(UIColor *)progressColor
{
_progressLayer.strokeColor = progressColor.CGColor;
}
- (void)setProgress:(float)progress
{
_progress = progress;
[self setProgress];
}
//漸變動畫
-(CABasicAnimation*)fadeAnimation
{
CABasicAnimation* fadeAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeAnimation.fromValue = [NSNumber numberWithFloat:0.0];
fadeAnimation.toValue = [NSNumber numberWithFloat:1.0];
fadeAnimation.duration = 2.0;
return fadeAnimation;
}
效果圖：
