带动画渐进效果与颜色渐变的圆弧进度控件设计
今天帮朋友写了一个小巧的圆弧进度控件，控件十分简单，主要设计思路采用CAShapeLayer来创建控件圆弧形状，使用CAGradientLayer来进行颜色渐变的渲染，两者结合来创建出颜色渐变的圆弧进度条控件，关于进度动画采用CoreAnimation动画处理。控件进行了简洁的封装，提供了面向使用的接口，需要的朋友可以自取，Demo地址如下：
http://pan.baidu.com/s/1gfqDbtp。
控件中主要提供了，改变进度条渐变颜色，圆弧进度条宽度，带动画效果的改变进度，改变进度百分比字体颜色等方法。效果是例如如下：
改变字体颜色
改变进度
改变进度条颜色
改变进度条宽度
控件接口的设计：
#import <UIKit/UIKit.h>
@interface YHBaseCircleView : UIView
//==============下面三个渐变色必须全部设置 否则效果可能与预期不同================//
/**
*设置圆弧渐变色的起始色
*/
@property(nonatomic,strong)UIColor * minLineColor;
/**
*设置圆弧渐变色的中间色
*/
@property(nonatomic,strong)UIColor * midLineColor;
/**
*设置圆弧渐变色的终止色
*/
@property(nonatomic,strong)UIColor * maxLineColor;
/**
*设置圆弧背景色
*/
@property(nonatomic,strong)UIColor * lineTintColor;
/**
*设置进度
*/
@property(nonatomic,assign)CGFloat progress;
/**
*设置线的宽度 max = 20 min = 0.5
*/
@property(nonatomic,assign)CGFloat lineWidth;
/**
*设置是否显示百分比标签
*/
@property(nonatomic,assign)BOOL showTipLabel;
/**
*设置百分比标签进度颜色
*/
@property(nonatomic,strong)UIColor * textColor;
/**
* @brief 设置进度
*
* @param progress 进度 取值0-1
*
* @param animated 是否显示动画
*
*/
-(void)setProgress:(CGFloat)progress animated:(BOOL)animated;
@end实现方法如下：
#import "YHBaseCircleView.h"
@implementation YHBaseCircleView
{
//进度控件内容尺寸
float _contentWidth;
float _contentHeight;
//形状layer
CAShapeLayer * _shapeLayer;
//颜色渐变layer
CAGradientLayer * _gradLayerR;
CAGradientLayer * _gradLayerL;
CALayer * _gradLayer;
//内容layer
CAShapeLayer * _contentLayer;
UILabel * _tipLabel;
//专门用来更新label
NSTimer * _timer;
float _oldProgress;
//进度新旧进度值
int old;
int new;
}
-(void)awakeFromNib{
[self reloadView];
}
-(instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
[self reloadView];
}
return self;
}
-(void)reloadView{
self.backgroundColor = [UIColor clearColor];
//取设置的frame的最小长或款作为内容区域
_contentWidth = _contentHeight = CGRectGetWidth(self.frame)>CGRectGetHeight(self.frame)?CGRectGetHeight(self.frame):CGRectGetWidth(self.frame);
//创建内容layer
_contentLayer = [CAShapeLayer layer];
_contentLayer.bounds = CGRectMake(0, 0, _contentWidth, _contentHeight);
_contentLayer.position = CGPointMake(_contentWidth/2, _contentHeight/2);
_contentLayer.backgroundColor = [UIColor clearColor].CGColor;
//进行边界描绘 默认线宽为4px
UIBezierPath * pathT = [UIBezierPath bezierPathWithArcCenter:_contentLayer.position radius:_contentWidth/2-2 startAngle:-M_PI_2 endAngle:M_PI_2*3 clockwise:YES];
_contentLayer.path = pathT.CGPath;
//默认填充颜色为白色
_contentLayer.fillColor = [UIColor whiteColor].CGColor;
_contentLayer.lineWidth = 4;
_contentLayer.strokeColor = [UIColor grayColor].CGColor;
[self.layer addSublayer:_contentLayer];
_shapeLayer = [CAShapeLayer layer];
_shapeLayer.bounds = CGRectMake(0, 0, _contentWidth, _contentHeight);
_shapeLayer.position = CGPointMake(_contentWidth/2, _contentHeight/2);
_shapeLayer.backgroundColor = [UIColor clearColor].CGColor;
// _shapeLayer.lineCap = kCALineCapRound;
//进行边界描绘 默认线宽为4px
UIBezierPath * path = [UIBezierPath bezierPathWithArcCenter:_shapeLayer.position radius:_contentWidth/2-2 startAngle:-M_PI_2 endAngle:M_PI_2*3 clockwise:YES];
_shapeLayer.path = path.CGPath;
_shapeLayer.fillColor = [UIColor clearColor].CGColor;
_shapeLayer.lineWidth = 4;
_shapeLayer.strokeColor = [UIColor redColor].CGColor;
//默认黄转橙转红的边界线 分别由两个gradLayer进行控制
_gradLayer = [CALayer layer];
_gradLayer.bounds = _contentLayer.bounds;
_gradLayer.position = _contentLayer.position;
_gradLayer.backgroundColor = [UIColor clearColor].CGColor;
_gradLayerL = [CAGradientLayer layer];
_gradLayerL.bounds = CGRectMake(0, 0, _contentWidth/2, _contentHeight);
_gradLayerL.locations = @[@0.6];
[_gradLayerL setColors:@[(id)[UIColor redColor].CGColor,(id)[UIColor orangeColor].CGColor]];
_gradLayerL.position = CGPointMake(_gradLayerL.bounds.size.width/2, _gradLayerL.bounds.size.height/2);
[_gradLayer addSublayer:_gradLayerL];
_gradLayerR = [CAGradientLayer layer];
_gradLayerR.locations = @[@0.6];
_gradLayerR.bounds = CGRectMake(_contentWidth/2, 0, _contentWidth/2, _contentHeight);
[_gradLayerR setColors:@[(id)[UIColor yellowColor].CGColor,(id)[UIColor orangeColor].CGColor]];
_gradLayerR.position = CGPointMake(_gradLayerR.bounds.size.width/2+_contentWidth/2, _gradLayerR.bounds.size.height/2);
[_gradLayer addSublayer:_gradLayerR];
[_gradLayer setMask:_shapeLayer];
[_contentLayer addSublayer:_gradLayer];
//setter方法初始化
_minLineColor = [UIColor yellowColor];
_midLineColor = [UIColor orangeColor];
_maxLineColor = [UIColor redColor];
_lineTintColor = [UIColor grayColor];
_progress = 1;
_lineWidth = 4;
_lineTintColor = [UIColor grayColor];
_textColor = [UIColor orangeColor];
_oldProgress = 1;
//创建tiplabel
[self creatTipLabel];
_timer = [NSTimer scheduledTimerWithTimeInterval:1/60.0 target:self selector:@selector(updateLabel) userInfo:nil repeats:YES];
_timer.fireDate = [NSDate distantFuture];
}
-(void)removeFromSuperview{
_timer.fireDate = [NSDate distantFuture];
[_timer invalidate];
_timer =nil;
[super removeFromSuperview];
}
-(void)updateLabel{
if (old<new) {
old++;
NSMutableAttributedString * attri = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"%d%%",old]];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:22] range:NSMakeRange(0, attri.length-1)];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15] range:NSMakeRange(attri.length-1, 1)];
[attri addAttribute:NSForegroundColorAttributeName value:_textColor range:NSMakeRange(0, attri.length)];
_tipLabel.attributedText = attri;
}else if (old>new){
old--;
NSMutableAttributedString * attri = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"%d%%",old]];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:22] range:NSMakeRange(0, attri.length-1)];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15] range:NSMakeRange(attri.length-1, 1)];
[attri addAttribute:NSForegroundColorAttributeName value:_textColor range:NSMakeRange(0, attri.length)];
_tipLabel.attributedText = attri;
}else{
_timer.fireDate = [NSDate distantFuture];
}
}
-(void)setMinLineColor:(UIColor *)minLineColor{
_minLineColor = minLineColor;
[_gradLayerR setColors:@[(id)_minLineColor.CGColor,(id)_midLineColor.CGColor]];
[_gradLayerL setColors:@[(id)_maxLineColor.CGColor,(id)_midLineColor.CGColor]];
}
-(void)setMidLineColor:(UIColor *)midLineColor{
_midLineColor = midLineColor;
[_gradLayerR setColors:@[(id)_minLineColor.CGColor,(id)_midLineColor.CGColor]];
[_gradLayerL setColors:@[(id)_maxLineColor.CGColor,(id)_midLineColor.CGColor]];
}
-(void)setMaxLineColor:(UIColor *)maxLineColor{
_maxLineColor = maxLineColor;
[_gradLayerR setColors:@[(id)_minLineColor.CGColor,(id)_midLineColor.CGColor]];
[_gradLayerL setColors:@[(id)_maxLineColor.CGColor,(id)_midLineColor.CGColor]];
}
-(void)setTintColor:(UIColor *)tintColor{
_lineTintColor = tintColor;
_contentLayer.strokeColor = tintColor.CGColor;
}
-(void)setProgress:(CGFloat)progress{
_oldProgress = _progress;
_progress=progress;
_shapeLayer.strokeStart = 0;
_shapeLayer.strokeEnd = progress>1?1:progress;
NSMutableAttributedString * attri ;
if (progress==1) {
attri = [[NSMutableAttributedString alloc]initWithString:@"100%"];
}else{
attri = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"%2d%%",(int)(progress*100)]];
}
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:22] range:NSMakeRange(0, attri.length-1)];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15] range:NSMakeRange(attri.length-1, 1)];
[attri addAttribute:NSForegroundColorAttributeName value:_textColor range:NSMakeRange(0, attri.length)];
_tipLabel.attributedText = attri;
}
-(void)setProgress:(CGFloat)progress animated:(BOOL)animated{
_oldProgress = _progress;
_progress = progress;
old = (int)(_oldProgress*100);
new = (int)(_progress*100);
CABasicAnimation * ani = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
ani.toValue = progress>1?@1:@(progress);
ani.duration = 0.3;
ani.delegate=self;
ani.fillMode=kCAFillModeForwards;
ani.removedOnCompletion=NO;
[_shapeLayer addAnimation:ani forKey:nil];
_timer.fireDate = [NSDate distantPast];
}
- (void)dealloc
{
}
-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
if (flag) {
[_shapeLayer removeAllAnimations];
_shapeLayer.strokeEnd = _progress>1?1:_progress;
}
}
-(void)setLineWidth:(CGFloat)lineWidth{
if (lineWidth<0.5) {
lineWidth=0.5;
}
if (lineWidth>20) {
lineWidth = 20;
}
_lineWidth = lineWidth;
UIBezierPath * path = [UIBezierPath bezierPathWithArcCenter:_shapeLayer.position radius:_contentWidth/2-lineWidth/2 startAngle:-M_PI_2 endAngle:M_PI_2*3 clockwise:YES];
_shapeLayer.path = path.CGPath;
_shapeLayer.fillColor = [UIColor clearColor].CGColor;
_shapeLayer.lineWidth = lineWidth;
_shapeLayer.strokeColor = [UIColor redColor].CGColor;
[_gradLayer setMask:_shapeLayer];
UIBezierPath * pathT = [UIBezierPath bezierPathWithArcCenter:_contentLayer.position radius:_contentWidth/2-lineWidth/2 startAngle:-M_PI_2 endAngle:M_PI_2*3 clockwise:YES];
_contentLayer.path = pathT.CGPath;
_contentLayer.lineWidth = lineWidth;
}
-(void)setTextColor:(UIColor *)textColor{
_textColor = textColor;
NSMutableAttributedString * attr = [[NSMutableAttributedString alloc]initWithAttributedString:_tipLabel.attributedText];
[attr addAttribute:NSForegroundColorAttributeName value:textColor range:NSMakeRange(0, attr.length)];
_tipLabel.attributedText = attr;
}
-(void)creatTipLabel{
_tipLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, sqrt(2)/2*(_contentWidth-_lineWidth*2), sqrt(2)/2*(_contentWidth-_lineWidth*2))];
_tipLabel.center = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
_tipLabel.backgroundColor = [UIColor clearColor];
_tipLabel.textAlignment = NSTextAlignmentCenter;
NSMutableAttributedString * attri = [[NSMutableAttributedString alloc]initWithString:@"100%"];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:22] range:NSMakeRange(0, 3)];
[attri addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15] range:NSMakeRange(3, 1)];
[attri addAttribute:NSForegroundColorAttributeName value:[UIColor orangeColor] range:NSMakeRange(0, 4)];
_tipLabel.attributedText = attri;
[self addSubview:_tipLabel];
}
@end
专注技术，热爱生活，交流技术，也做朋友。
——珲少 QQ群：203317592
来源：oschina
链接：https://my.oschina.net/u/2340880/blog/661004