本文实例为大家分享了ios实现轮盘动态效果的具体代码，供大家参考，具体内容如下
一个常用的绘图，主要用来打分之类的动画，效果如下。
主要是ios的绘图和动画，本来想用系统自带动画实现呢，发现实现不了，用了其他办法延时并重绘视图没有成功，用了gcd延时，nsthread休眠，performselector delay 都不行。最后用了一个定时器实现类似效果，总感觉不太明智，以后应该考虑下对calayer和
隐式动画的角度考虑下
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#import <uikit/uikit.h> /** * 自定义变量里面以s结尾的表示具体的数值，否则表示的是表示显示具体内容的标签，以lbe的表示对内容的说明 比如comments 表示的具体评价内容，comment 表示评价的具体内容，lbecomment 是一个显示 "评价："的标签 */ @interface scoreplateview : uiview /*速度满意度*/@property (nonatomic,assign) cgfloat speedvalues; /*态度满意度*/@property (nonatomic,assign) cgfloat altitudevalues; /*把半圆分割的份数*/@property (nonatomic,assign) int precision;/** * 整体评价 */@property (nonatomic,strong) nsstring * comments;/** * 满分是多少分 */@property (nonatomic,assign) cgfloat fullvalues;/** * 综合评分 */@property (nonatomic,assign) cgfloat comprevalues;/** * 开始角度 */ @property (nonatomic,assign) cgfloat startangle;/** * 终止角度 */@property (nonatomic,assign) cgfloat endangle; //-(void)startanimation;@end |
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#import "scoreplateview.h" @interface scoreplateview(){ cgfloat d_speed;//执行动画时候每个的增量 cgfloat d_altitude; cgfloat d_comp;} @property (nonatomic,strong) uilabel*lbecomprevalue;//综合分数的标签 @property (nonatomic,strong) uilabel *comprevalue;//综合分数的具体数值 @property (nonatomic,strong) uilabel * comment;//评价 @property (nonatomic,assign) cgfloat cur_speedv;//当前的值 @property (nonatomic,assign) cgfloat cur_altitudev;//当前的态度； @property (nonatomic,assign) cgfloat cur_compv;//当前的综合分数@property (nonatomic,assign) nstimer * timer; @end @implementation scoreplateview - (instancetype)initwithframe:(cgrect)frame{ if (self = [super initwithframe:frame]) { self.precision= 50;//这里设置默认值; self.fullvalues =5; self.altitudevalues=3.0; self.speedvalues=4.0; self.backgroundcolor = [uicolor clearcolor]; self.startangle=0.1*m_pi; self.endangle = 0.9*m_pi; self.comments =@"真是太不可思议了"; self.backgroundcolor = [uicolor greencolor]; _cur_compv=0; _cur_speedv=0; _cur_altitudev=0; } return self;}- (void)drawrect:(cgrect)rect { //1. 画圆 cgfloat circlemargin = 0; //上下两个半圆的间距 cgfloat topbottommargin =20;//这个间距用来显示服务态度和服务速度那样标签内容 cgfloat radius = (self.frame.size.height-circlemargin-2*topbottommargin)/2;//半径 //上边圆的圆心 cgpoint centertop = cgpointmake(self.frame.size.width/2,self.frame.size.height/2-circlemargin/2); [self drawhalfcircle:centertop andwithradius:radius istop:yes]; //下面圆的圆心 cgpoint centerbottom = cgpointmake(self.frame.size.width/2, self.frame.size.height/2+circlemargin/2); [self drawhalfcircle:centerbottom andwithradius:radius istop:no]; //2. 创建需要的标签,并在合适的位置绘制内容 uilabel * lbealtitude = [[uilabel alloc]initwithframe:cgrectmake(0, 0, self.frame.size.width, topbottommargin)]; lbealtitude.text = @"服务速度"; lbealtitude.textcolor = [uicolor whitecolor]; lbealtitude.textalignment = nstextalignmentcenter; lbealtitude.font = [uifont systemfontofsize:12]; [lbealtitude drawtextinrect:lbealtitude.frame]; //服务态度评分 uilabel * lbespeed = [[uilabel alloc]initwithframe:cgrectmake(0, self.frame.size.height-topbottommargin, self.frame.size.width, topbottommargin)]; lbespeed.text = @"服务态度"; lbespeed.textcolor = [uicolor whitecolor]; lbespeed.textalignment = nstextalignmentcenter; lbespeed.font = [uifont systemfontofsize:12]; [lbespeed drawtextinrect:lbespeed.frame]; //绘制综合评分 nsstring *attitudescore = [nsstring stringwithformat:@"%.2f/%.2f",_cur_altitudev,self.fullvalues]; nsmutableattributedstring* attributestring = [[nsmutableattributedstring alloc]initwithstring:attitudescore]; [attributestring addattribute:nsfontattributename value:[uifont systemfontofsize:26] range:nsmakerange(0, 4)]; [attributestring addattribute:nsfontattributename value:[uifont systemfontofsize:16] range:nsmakerange(4, 3)]; self.comprevalue = [[uilabel alloc]initwithframe:cgrectmake(0, radius-topbottommargin,self.frame.size.width, 2*topbottommargin)]; self.comprevalue.attributedtext = attributestring; self.comprevalue.textalignment = nstextalignmentcenter; self.comprevalue.textcolor = [uicolor whitecolor]; self.comprevalue.frame = cgrectmake(0, centertop.y-topbottommargin+circlemargin/2, self.frame.size.width, topbottommargin*2); [self.comprevalue drawtextinrect:self.comprevalue.frame]; self.lbecomprevalue = [[uilabel alloc]initwithframe:cgrectmake(0, centertop.y-radius*0.5, self.frame.size.width, topbottommargin*2)]; self.lbecomprevalue.text =@"综合评分"; self.lbecomprevalue.textalignment = nstextalignmentcenter; self.lbecomprevalue.textcolor = [uicolor whitecolor]; self.lbecomprevalue.font = [uifont systemfontofsize:14]; [self.lbecomprevalue drawtextinrect:self.lbecomprevalue.frame]; //评价内容 self.comment = [[uilabel alloc]initwithframe:cgrectmake(topbottommargin+circlemargin+radius/2, cgrectgetmaxy(self.comprevalue.frame), radius, topbottommargin*2)]; self.comment.text =self.comments; self.comment.numberoflines=0; self.comment.textalignment = nstextalignmentcenter; self.comment.textcolor = [uicolor whitecolor]; self.comment.font = [uifont systemfontofsize:14]; [self.comment drawtextinrect:self.comment.frame]; }/** * 画半圆 绘制刻度的时候可以先绘制从圆心的线，最后用一个内圆裁剪的方式，但是如果要求背景随时变化就局限了，特别是父视图背景是渐变的，要么重新定义该类，要么把这个类视图定义为透明，从而透过父视图背景颜色 透明的背景无法掩盖从圆心出发的线， * * @param center 圆心坐标 * @param radius 半径 * @param top 是不是画上面的圆 */-(void)drawhalfcircle:(cgpoint) center andwithradius:(cgfloat)radius istop:(bool) top{ //画上面圆的边框 cgcontextref ctx = uigraphicsgetcurrentcontext(); cgcontextsetstrokecolorwithcolor(ctx, [uicolor whitecolor].cgcolor); if (top) { cgcontextaddarc(ctx, center.x, center.y, radius, -self.startangle, -self.endangle, 1); } else { cgcontextaddarc(ctx, center.x, center.y, radius,self.startangle,self.endangle, 0); } //设置线的宽度 cgcontextsetlinewidth(ctx, 1); cgcontextsetstrokecolorwithcolor(ctx, [uicolor whitecolor].cgcolor); cgcontextstrokepath(ctx); //绘制上下圆的分割线 cgcontextsetlinewidth(ctx, 2);//设置线宽 cgfloat bordervalue; if (top) { bordervalue=_cur_altitudev/self.fullvalues;//设置边界值 } else { bordervalue =_cur_speedv/self.fullvalues; } //实现动画效果，只能先画刻度，再画具体值 for (int i=1; i<self.precision; i++)//画刻度 { cgcontextsetrgbstrokecolor(ctx, 1.0, 1.0, 1.0, 0.5);//设置白色 透明 cgfloat endx,endy,startx,starty;//刻度的长度是这里 7 -2 =5； if (top) { startx = center.x -(radius-10)*cos((double)i/self.precision*(self.endangle-self.startangle)+self.startangle); starty = center.y - (radius-10)*sin((double)i/self.precision*(self.endangle-self.startangle)+self.startangle); endx = center.x - (radius-2)*cos((double)i/self.precision*(self.endangle-self.startangle)+self.startangle);//圆上的点的x坐标 endy = center.y - (radius-2)*sin((double)i/self.precision*(self.endangle-self.startangle)+self.startangle);//圆上的点的y坐标 } else { startx = center.x +(radius-10)*cos((double)i/self.precision*(self.endangle-self.startangle)+self.startangle); starty = center.y + (radius-10)*sin((double)i/self.precision*(self.endangle-self.startangle)+self.startangle); endx = center.x + (radius-2)*cos((double)i/self.precision*(self.endangle-self.startangle)+self.startangle);//圆上的点的x坐标 endy = center.y + (radius-2)*sin((double)i/self.precision*(self.endangle-self.startangle)+self.startangle);//圆上的点的y坐标 } cgcontextmovetopoint(ctx, startx, starty); cgcontextaddlinetopoint(ctx, endx, endy); cgcontextstrokepath(ctx); } for (int i=1; i<self.precision; i++) { cgfloat curangle =(double)i/self.precision*(self.endangle-self.startangle)+self.startangle; if ((double)i/(double)self.precision<bordervalue) { cgcontextsetrgbstrokecolor(ctx, 1.0, 1.0, 1.0, 1);//设置白色 不透明 cgfloat endx,endy,startx,starty;//刻度的长度是这里 7 -2 =5； if (top) { startx = center.x -(radius-10)*cos(curangle); starty = center.y - (radius-10)*sin(curangle); endx = center.x - (radius-2)*cos(curangle);//圆上的点的x坐标 endy = center.y - (radius-2)*sin(curangle);//圆上的点的y坐标 } else { startx = center.x +(radius-10)*cos(curangle); starty = center.y + (radius-10)*sin(curangle); endx = center.x + (radius-2)*cos(curangle);//圆上的点的x坐标 endy = center.y + (radius-2)*sin(curangle);//圆上的点的y坐标 } cgcontextmovetopoint(ctx, startx, starty); cgcontextaddlinetopoint(ctx, endx, endy); cgcontextstrokepath(ctx); } }}- (void)didmovetosuperview{ self.timer = [nstimer scheduledtimerwithtimeinterval:0.1 target:self selector:@selector(update) userinfo:nil repeats:yes]; d_comp = self.comprevalues/20; d_speed= self.speedvalues/20; d_altitude=self.speedvalues/20;}-(void)update{ _cur_altitudev+=d_altitude; _cur_speedv+=d_speed; _cur_compv+=d_comp; if (_cur_altitudev>self.altitudevalues) { _cur_altitudev =self.altitudevalues; } if (_cur_speedv > self.speedvalues) { _cur_speedv=self.speedvalues; } if (_cur_compv>self.comprevalues) { _cur_compv=self.comprevalues; } if ( _cur_compv==self.comprevalues&&_cur_speedv==self.speedvalues&&_cur_altitudev ==self.altitudevalues) { [self.timer invalidate]; self.timer = nil; } //self.backgroundcolor = [uicolor colorwithred:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:1]; [self setneedsdisplay]; } @end |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/a158337/article/details/50440983
