cell部分圆角 UITableViewCell部分圆角 UITableViewCell多分组下部分圆角 作者：ttdiOS 链接：https://juejin.cn/spost/7277362508813500457 来源：稀土掘金 著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

实现效果如图：

swift和oc版本都有 直接上demo：

.h文件： #import  NS_ASSUME_NONNULL_BEGIN @interface LLJSUIKitHelper : NSObject -(void)LLJCView:(UIView*)viewcornerRadius:(NSArray*)cornerRadius; @end NS_ASSUME_NONNULL_END .m文件 #import "LLJSUIKitHelper.h" @implementation LLJSUIKitHelper -(void)LLJCView:(UIView*)subViewcornerRadius:(NSArray*)cornerRadius{     UIBezierPath path = [[UIBezierPath alloc] init];     NSMutableArraycornerArray  = [NSMutableArray array];     for(inti =0; i         if(i ==0){             [cornerArrayaddObject:@(UIRectCornerTopLeft)];         }else if(i ==1){             [cornerArrayaddObject:@(UIRectCornerTopRight)];         }else if(i ==2){             [cornerArrayaddObject:@(UIRectCornerBottomRight)];         }else if(i ==3){             [cornerArrayaddObject:@(UIRectCornerBottomLeft)];         }     }     path = [selfdrawRoundedRect:subView.boundsbyRoundingCorners:cornerArraycornerRadius:cornerRadius];     CAShapeLayer subLayer = [CAShapeLayer layer];     subLayer.fillColor = [UIColor whiteColor].CGColor;     subLayer.path= path.CGPath;     subLayer.frame= subView.bounds;     subView.layer.mask= subLayer; } -(UIBezierPath)drawRoundedRect:(CGRect)rectbyRoundingCorners:(NSMutableArray*)byRoundingCornerscornerRadius:(NSArray*)cornerRadius{     UIBezierPath path = [[UIBezierPath alloc] init];     CGPoint  startPoint =CGPointMake(rect.origin.x, rect.origin.y);     //处理第一个角     if ([byRoundingCorners containsObject:@(UIRectCornerTopLeft)]) {         NSNumberposition = cornerRadius.firstObject;// ------>cornerRadius         CGFloatmycg = position.floatValue;         [pathmoveToPoint:CGPointMake(startPoint.x+ mycg, startPoint.y)];     }else{         [pathmoveToPoint:CGPointMake(startPoint.x, startPoint.y)];     }     //处理第二个角     if ([byRoundingCorners containsObject:@(UIRectCornerTopRight)]) {         NSNumberposition = [cornerRadiusobjectAtIndex:1];         CGFloatmycg = position.floatValue;         [pathaddLineToPoint:CGPointMake(startPoint.x+ rect.size.width- mycg, startPoint.y)];         [pathaddArcWithCenter:CGPointMake(startPoint.x+ rect.size.width- mycg, startPoint.y+ mycg)radius:mycgstartAngle: (M_PI3/2)endAngle:0clockwise:YES];     }else{         [pathaddLineToPoint:CGPointMake(startPoint.x+ rect.size.width, startPoint.y)];     }     //处理第三个角     if ([byRoundingCorners containsObject:@(UIRectCornerBottomRight)]) {         NSNumberposition = [cornerRadiusobjectAtIndex:2];         CGFloatmycg = position.floatValue;         [pathaddLineToPoint:CGPointMake(startPoint.x+ rect.size.width, startPoint.y+rect.size.height)];         [pathaddArcWithCenter:CGPointMake(startPoint.x+rect.size.width-mycg, startPoint.y+rect.size.height-mycg)radius:mycgstartAngle:0endAngle: (M_PI/2)clockwise:YES];     }else{         [pathaddLineToPoint:CGPointMake(startPoint.x+ rect.size.width, startPoint.y+ rect.size.height)];     } //    //处理第四个角     if ([byRoundingCorners containsObject:@(UIRectCornerBottomLeft)]) {         NSNumberposition = [cornerRadiusobjectAtIndex:3];         CGFloatmycg = position.floatValue;         [pathaddLineToPoint:CGPointMake(startPoint.x+ mycg, startPoint.y+rect.size.height)];         [pathaddArcWithCenter:CGPointMake(startPoint.x+mycg, startPoint.y+ rect.size.height-mycg)radius:mycgstartAngle: (M_PI/2)endAngle: (M_PI)clockwise:YES];     }else{         [pathaddLineToPoint:CGPointMake(startPoint.x, startPoint.y+rect.size.height)];     } //    //再次处理第一个角     if ([byRoundingCorners containsObject:@(UIRectCornerTopLeft)]) {         NSNumberposition = cornerRadius.firstObject;          CGFloatmycg = position.floatValue;         [pathaddLineToPoint:CGPointMake(startPoint.x, startPoint.y+ mycg)];         [pathaddArcWithCenter:CGPointMake(startPoint.x+mycg, startPoint.y+ mycg)radius:mycgstartAngle: (M_PI)endAngle:(M_PI3/2)clockwise:YES];     }else{         [pathaddLineToPoint:CGPointMake(startPoint.x, startPoint.y)];     }     returnpath; } @end 调用：直接在对应的TableView所在vc里写如下即可：

• (void)tableView:(UITableView)tableViewwillDisplayCell:(UITableViewCell)cellforRowAtIndexPath:(NSIndexPath*)indexPath{ **     //组切圆角     //方法一 判断第一个cell, 切出左上和又上圆角, 最后一个cell, 切出左下和右下圆角     //方法二 使用带圆角的图片模拟     LLJSUIKitHelper*kitHelper =  [[LLJSUIKitHelper alloc] init];     if(indexPath.section==sectionSystem){         [kitHelperLLJCView:cellcornerRadius:@[@(20),@(20),@(20),@(20)]];   }  else if(indexPath.section==sectionCommunity){       [kitHelperLLJCView:cellcornerRadius:@[@(20),@(20),@(12),@(12)]];   }   else if(indexPath.section==sectionWangyi){       [kitHelperLLJCView:cellcornerRadius:@[@(20),@(10),@(40),@(20)]];   }else if(indexPath.section==sectionChat){       if(self.recentSessions.count>0) {           if(self.recentSessions.count==1) {               [kitHelperLLJCView:cellcornerRadius:@[@(10),@(10),@(10),@(10)]];           }else{               if( indexPath.row==0) {                   [kitHelperLLJCView:cellcornerRadius:@[@(10),@(10),@(0),@(0)]];               }else if(indexPath.row==self.recentSessions.count-1) { //                  LLJSUIKitHelper.LLJCView(subView: cell, cornerRadius: [0,0,12,12])                   [kitHelperLLJCView:cellcornerRadius:@[@(0),@(0),@(10),@(10)]];               }           }       }   }   else if(indexPath.section==sectionGray){       [kitHelperLLJCView:cellcornerRadius:@[@(20),@(10),@(40),@(20)]];   } }

swift代码如下： importUIKit public class LLJSUIKitHelper {     //UIView     class func LLJView(backGroundColor: UIColor?, frame: CGRect?) -> UIView {         letview =UIView()         if(backGroundColor !=nil) {             view.backgroundColor= backGroundColor         }         if(frame !=nil) {             view.frame= frame!         }         returnview     }     //UIView 切统一圆角     class func LLJCView(subView: UIView, cornerRadius: CGFloat) {         // 圆角         LLJCView(subView: subView,cornerRadius: [cornerRadius,cornerRadius,cornerRadius,cornerRadius])     }     //UIView 切指定不同圆角 cornerRadius = [8,10,12,14] 一次对应topLeft，topRight，bottomRight，bottomLeft的圆角半径     class func LLJCView(subView: UIView, cornerRadius: [CGFloat]) {         // 圆角         varpath:UIBezierPath?         varcornerArray = UIRectCorner         foriinstride(from:0,to: cornerRadius.count,by:1) {             ifi ==0{                 cornerArray.append(UIRectCorner.topLeft)             }else ifi ==1{                 cornerArray.append(UIRectCorner.topRight)             }else ifi ==2{                 cornerArray.append(UIRectCorner.bottomRight)             }else ifi ==3{                 cornerArray.append(UIRectCorner.bottomLeft)             }         }         path =LLJBezierPath.drawRoundedRect(rect: subView.bounds,byRoundingCorners: cornerArray,cornerRadius: cornerRadius)         letsubLayer =CAShapeLayer()         subLayer.path= path!.cgPath         subLayer.frame= subView.bounds         subView.layer.mask= subLayer;     }     //按钮     class func LLJButton(title: String?, titleColor: UIColor?, backGroundColor: UIColor?, titleFont: UIFont?, frame: CGRect?) -> UIButton {         let button = UIButton(type: UIButton.ButtonType.custom)         if(title !=nil) {             button.setTitle(title,for:UIControl.State.normal)         }         if(titleColor !=nil) {             button.setTitleColor(titleColor,for:UIControl.State.normal)         }         if(backGroundColor !=nil) {             button.backgroundColor= backGroundColor         }         if(titleFont !=nil) {             button.titleLabel?.font= titleFont         }         if(frame !=nil) {             button.frame= frame!         }         returnbutton;     }     //Label     class func LLJLabel(title: String?, titleColor: UIColor?, backGroundColor: UIColor?, titleFont: UIFont?, frame: CGRect?, numberOfLines: Int) -> UILabel {         letlabel =UILabel()         if(title !=nil) {             label.text= title         }         if(titleColor !=nil) {             label.textColor= titleColor         }         if(backGroundColor !=nil) {             label.backgroundColor= backGroundColor         }         if(titleFont !=nil) {             label.font= titleFont         }         if(frame !=nil) {             label.frame= frame!         }         label.numberOfLines= numberOfLines         returnlabel;     } }

importUIKit class LLJBezierPath {     /*      * 画圆 椭圆      * rect.w = rect.h 时画圆； rect.w != rect.h 画椭圆      /     class func drawCyle(rect: CGRect) -> UIBezierPath {         letpath =UIBezierPath.init(ovalIn: rect)         returnpath     }     /      * 画圆 圆弧      * arcCenter: 圆心      * radius: 半径      * startAngle: 开始角度      * endAngle: 结束角度      * clockwise: 顺时针 yes 逆时针 no      /     class func drawCyle(arcCenter: CGPoint, radius: CGFloat, startAngle: CGFloat, endAngle: CGFloat, clockwise: Bool) -> UIBezierPath {         letpath =UIBezierPath.init(arcCenter: arcCenter,radius: radius,startAngle: startAngle,endAngle: endAngle,clockwise: clockwise)         returnpath     }     /      * 画矩形 统一圆角      * rect: 矩形rect      /     class func drawRoundedRect(rect: CGRect, cornerRadius: CGFloat?) -> UIBezierPath {         letpath =UIBezierPath.init(roundedRect: rect,cornerRadius: cornerRadius ??0.0)         returnpath     }     /      * 画矩形 单一圆角      * rect: 矩形rect      /     class func drawRoundedRect(rect: CGRect, byRoundingCorners: UIRectCorner, cornerRadius: CGFloat) -> UIBezierPath {         letpath =UIBezierPath.init(roundedRect: rect,byRoundingCorners: byRoundingCorners,cornerRadii:CGSize(width: cornerRadius,height: cornerRadius))         returnpath     }     /      * 画矩形 可变圆角      * byRoundingCorners: 需要切的圆角      * cornerRadius: 圆角半径      * 注意：byRoundingCorners要和cornerRadius一一对应。      * 如：[UIRectCorner.topLeft,UIRectCorner.topRight,UIRectCorner.bottomLeft,UIRectCorner.bottomRight] 对应 [10,5,5,10]      /     class func drawRoundedRect(rect: CGRect, byRoundingCorners: [UIRectCorner], cornerRadius: [CGFloat]) -> UIBezierPath {         letpath =UIBezierPath()         letstartPoint =CGPoint(x: rect.origin.x,y: rect.origin.y)         //处理第一个角         ifbyRoundingCorners.contains(UIRectCorner.topLeft) {             letposition = byRoundingCorners.firstIndex(of:UIRectCorner.topLeft)             path.move(to:CGPoint(x: startPoint.x+ cornerRadius[position!],y: startPoint.y))         }else{             path.move(to:CGPoint(x: startPoint.x,y: startPoint.y))         }         //处理第二个角         ifbyRoundingCorners.contains(UIRectCorner.topRight) {             letposition = byRoundingCorners.firstIndex(of:UIRectCorner.topRight)             path.addLine(to:CGPoint(x: startPoint.x+ rect.width- cornerRadius[position!],y: startPoint.y))             path.addArc(withCenter:CGPoint(x: startPoint.x+ rect.width- cornerRadius[position!],y: startPoint.y+ cornerRadius[position!]),radius: cornerRadius[position!],startAngle:CGFloat.pi3/2,endAngle:0,clockwise:true)         }else{             path.addLine(to:CGPoint(x: startPoint.x+ rect.width,y: startPoint.y))         }         //处理第三个角         ifbyRoundingCorners.contains(UIRectCorner.bottomRight) {             letposition = byRoundingCorners.firstIndex(of:UIRectCorner.bottomRight)             path.addLine(to:CGPoint(x: startPoint.x+ rect.width,y: startPoint.y+ rect.height- cornerRadius[position!]))             path.addArc(withCenter:CGPoint(x: startPoint.x+ rect.width- cornerRadius[position!],y: startPoint.y+ rect.height- cornerRadius[position!]),radius: cornerRadius[position!],startAngle:0,endAngle:CGFloat.pi/2,clockwise:true)         }else{             path.addLine(to:CGPoint(x: startPoint.x+ rect.width,y: startPoint.y+ rect.height))         }         //处理第四个角         ifbyRoundingCorners.contains(UIRectCorner.bottomLeft) {             letposition = byRoundingCorners.firstIndex(of:UIRectCorner.bottomLeft)             path.addLine(to:CGPoint(x: startPoint.x+ cornerRadius[position!],y: startPoint.y+ rect.height))             path.addArc(withCenter:CGPoint(x: startPoint.x+ cornerRadius[position!],y: startPoint.y+ rect.height- cornerRadius[position!]),radius: cornerRadius[position!],startAngle:CGFloat.pi/2,endAngle:CGFloat.pi,clockwise:true)         }else{             path.addLine(to:CGPoint(x: startPoint.x,y: startPoint.y+ rect.height))         }         //再次处理第一个角         ifbyRoundingCorners.contains(UIRectCorner.topLeft) {             letposition = byRoundingCorners.firstIndex(of:UIRectCorner.topLeft)             path.addLine(to:CGPoint(x: startPoint.x,y: startPoint.y+ cornerRadius[position!]))             path.addArc(withCenter:CGPoint(x: startPoint.x+ cornerRadius[position!],y: startPoint.y+ cornerRadius[position!]),radius: cornerRadius[position!],startAngle:CGFloat.pi,endAngle:CGFloat.pi3/2,clockwise:true)         }else{             path.addLine(to:CGPoint(x: startPoint.x,y: startPoint.y))         }         returnpath     }     /      * 画多边行 或折线      * pointArray：多边形顶点数组，第一个点默认起点      * closePath：true表示关闭，即多边形；false表示不关闭，即折线图      /     class func drawPolygon(pointArray: Array, closePath: Bool) -> UIBezierPath {         letpath =UIBezierPath()         foriinstride(from:0,to: pointArray.count,by:1) {             letpoint = pointArray[i]             ifi ==0{                 path.move(to: point)             }else{                 path.addLine(to: point)             }         }         ifclosePath {             path.close()         }         returnpath     }     /      * 画曲线 单曲线      * startPoint: 起点      * endPoint: 终点      * controlPoint: 控制点      /     class func drawoQuadCurve(startPoint: CGPoint, endPoint: CGPoint, controlPoint: CGPoint) -> UIBezierPath {         letpath =UIBezierPath()         path.move(to: startPoint)         path.addQuadCurve(to: endPoint,controlPoint: controlPoint)         returnpath     }     /      * 画曲线 双曲线      * startPoint: 起点      * endPoint: 终点      * controlPoint1: 控制点1      * controlPoint2: 控制点2      */     class func drawCurve(startPoint: CGPoint, endPoint: CGPoint, controlPoint1: CGPoint, controlPoint2: CGPoint) -> UIBezierPath {         letpath =UIBezierPath()         path.move(to: startPoint)         path.addCurve(to: endPoint,controlPoint1: controlPoint1,controlPoint2: controlPoint2)         returnpath     } }

调用： extension LLJWChatMainViewController: UITableViewDelegate {     functableView(_tableView:UITableView,willDisplaycell:UITableViewCell,forRowAtindexPath:IndexPath) {         //组切圆角         //方法一 判断第一个cell, 切出左上和又上圆角, 最后一个cell, 切出左下和右下圆角         //方法二 使用带圆角的图片模拟         letsubArray =self.dataArray[indexPath.section]         //切圆角         ifsubArray.count==1{             LLJSUIKitHelper.LLJCView(subView: cell,cornerRadius: [12,12,12,12])         }else{             ifindexPath.row==0{                 LLJSUIKitHelper.LLJCView(subView: cell,cornerRadius: [12,12,0,0])             }else if(indexPath.row== subArray.count-1) {                 LLJSUIKitHelper.LLJCView(subView: cell,cornerRadius: [0,0,12,12])             }         }     } }