ios自定义环形进度条

调用方法：//**********调用**********myCircleProgress*circleProgress=[[myCircleProgressalloc]initWithFrame:CGRectMake(50,80,100,100)];circleProgress.trackColor=[UIColorlightGrayColor];circleProgress.progressColor=[UIColorblueColor];circleProgress.title.textColor=[UIColorblueColor];