.h文件的内容就是一些声明
#import
@interfaceProgressView :UIView
//中心颜色
@property(strong,nonatomic)UIColor*centerColor;
//圆环背景色
@property(strong,nonatomic)UIColor*arcBackColor;
//圆环色
@property(strong,nonatomic)UIColor*arcFinishColor;
@property(strong,nonatomic)UIColor*arcUnfinishColor;
//百分比数值（0-1）
@property(assign,nonatomic)floatpercent;
//圆环宽度
@property(assign,nonatomic)floatwidth;
@end
.m文件里就是具体实现了
#import"ProgressView.h"
@implementationProgressView
- (id)initWithFrame:(CGRect)frame{
self= [superinitWithFrame:frame];
if(self) {
self.backgroundColor=ClearColor;
_percent=0;
_width=0;
}
returnself;
}
- (void)setPercent:(float)percent{
_percent= percent;
[selfsetNeedsDisplay];
}
- (void)drawRect:(CGRect)rect{
[selfaddArcBackColor];
[selfdrawArc];
[selfaddCenterBack];
[selfaddCenterLabel];
}
- (void)addArcBackColor{
CGColorRefcolor = (_arcBackColor==nil) ? [UIColorlightGrayColor].CGColor:_arcBackColor.CGColor;
CGContextRefcontextRef =UIGraphicsGetCurrentContext();
CGSizeviewSize =self.bounds.size;
CGPointcenter =CGPointMake(viewSize.width/2, viewSize.height/2);
// Draw the slices.
CGFloatradius = viewSize.width/2;
CGContextBeginPath(contextRef);
CGContextMoveToPoint(contextRef, center.x, center.y);
CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI,0);
CGContextSetFillColorWithColor(contextRef, color);
CGContextFillPath(contextRef);
}
- (void)drawArc{
if(_percent==0||_percent>1) {
return;
}
if(_percent==1) {
CGColorRefcolor = (_arcFinishColor==nil) ? [UIColorgreenColor].CGColor:_arcFinishColor.CGColor;
CGContextRefcontextRef =UIGraphicsGetCurrentContext();
CGSizeviewSize =self.bounds.size;
CGPointcenter =CGPointMake(viewSize.width/2, viewSize.height/2);
// Draw the slices.
CGFloatradius = viewSize.width/2;
CGContextBeginPath(contextRef);
CGContextMoveToPoint(contextRef, center.x, center.y);
CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI,0);
CGContextSetFillColorWithColor(contextRef, color);
CGContextFillPath(contextRef);
}else{
floatendAngle =2*M_PI*_percent;
CGColorRefcolor = (_arcUnfinishColor==nil) ? [UIColorblueColor].CGColor:_arcUnfinishColor.CGColor;
CGContextRefcontextRef =UIGraphicsGetCurrentContext();
CGSizeviewSize =self.bounds.size;
CGPointcenter =CGPointMake(viewSize.width/2, viewSize.height/2);
// Draw the slices.
CGFloatradius = viewSize.width/2;
CGContextBeginPath(contextRef);
CGContextMoveToPoint(contextRef, center.x, center.y);
CGContextAddArc(contextRef, center.x, center.y, radius,0,endAngle,0);
CGContextSetFillColorWithColor(contextRef, color);
CGContextFillPath(contextRef);
}
}
-(void)addCenterBack{
floatwidth = (_width==0) ?5:_width;
CGColorRefcolor = (_centerColor==nil) ? [UIColorwhiteColor].CGColor:_centerColor.CGColor;
CGContextRefcontextRef =UIGraphicsGetCurrentContext();
CGSizeviewSize =self.bounds.size;
CGPointcenter =CGPointMake(viewSize.width/2, viewSize.height/2);
// Draw the slices.
CGFloatradius = viewSize.width/2- width;
CGContextBeginPath(contextRef);
CGContextMoveToPoint(contextRef, center.x, center.y);
CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI,0);
CGContextSetFillColorWithColor(contextRef, color);
CGContextFillPath(contextRef);
}
- (void)addCenterLabel{
NSString*percent =@"";
floatfontSize =14;
UIColor*arcColor = [UIColorblueColor];
if(_percent==1) {
percent =@"100%";
fontSize =14;
arcColor = (_arcFinishColor==nil) ? [UIColorgreenColor] :_arcFinishColor;
}elseif(_percent<1&&_percent>=0){
fontSize =13;
arcColor = (_arcUnfinishColor==nil) ? [UIColorblueColor] :_arcUnfinishColor;
percent = [NSStringstringWithFormat:@"%0.2f%%",_percent*100];
}
CGSizeviewSize =self.bounds.size;
NSMutableParagraphStyle*paragraph = [[NSMutableParagraphStylealloc]init];
paragraph.alignment=NSTextAlignmentCenter;
NSDictionary*attributes = [NSDictionarydictionaryWithObjectsAndKeys:[UIFontboldSystemFontOfSize:fontSize],NSFontAttributeName,arcColor,NSForegroundColorAttributeName,[UIColorclearColor],NSBackgroundColorAttributeName,paragraph,NSParagraphStyleAttributeName,nil];
[percentdrawInRect:CGRectMake(5, (viewSize.height-fontSize)/2, viewSize.width-10, fontSize)withAttributes:attributes];
}
@end
