IOS UITableView设置Section圆角，有SectionView情况下

效果图如下：

1、如果有sectionHeaderView情况，第一行不设置圆角，在添加sectionHeaderView的时候设置圆角即可。

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
    if ([cell respondsToSelector:@selector(tintColor)]) {
        CGFloat cornerRadius = 8.f;
        cell.backgroundColor = UIColor.clearColor;
        CAShapeLayer *layer = [[CAShapeLayer alloc] init];
        CGMutablePathRef pathRef = CGPathCreateMutable();
        CGRect bounds = CGRectInset(cell.bounds, 15, 0);
        BOOL addLine = NO;
        if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
            CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
        }
        //默认把第一行的圆角去掉
        else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
            CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
            CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
        } else {
            CGPathAddRect(pathRef, nil, bounds);
            addLine = YES;
        }
        layer.path = pathRef;
        CFRelease(pathRef);
        //颜色修改
        layer.fillColor = white_Color.CGColor;
        layer.strokeColor=[UIColor whiteColor].CGColor;
        // 阴影颜色
        layer.shadowColor = black_Color.CGColor;
        // 阴影偏移，默认(0, -3)
        layer.shadowOffset = CGSizeMake(0,-3);
        // 阴影透明度，默认0
        layer.shadowOpacity = 0;
        UIView *testView = [[UIView alloc] initWithFrame:bounds];
        [testView.layer insertSublayer:layer atIndex:0];
        testView.backgroundColor = UIColor.clearColor;
        cell.backgroundView = testView;
    }
}

2、如果没有有seciontHeaderView情况，那么可以直接设置

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
    if ([cell respondsToSelector:@selector(tintColor)]) {
        CGFloat cornerRadius = 10.f;
        cell.backgroundColor = UIColor.clearColor;
        CAShapeLayer *layer = [[CAShapeLayer alloc] init];
        CGMutablePathRef pathRef = CGPathCreateMutable();
        CGRect bounds = CGRectInset(cell.bounds, 10, 0);
        BOOL addLine = NO;
        if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
            CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
        } else if (indexPath.row == 0) {

            CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
            CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
            addLine = YES;
            
        } else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
            CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
            CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
            CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
        } else {
            CGPathAddRect(pathRef, nil, bounds);
            addLine = YES;
        }
        layer.path = pathRef;
        CFRelease(pathRef);
        //颜色修改
        layer.fillColor = white_Color.CGColor;
        layer.strokeColor=[UIColor whiteColor].CGColor;
        // 阴影颜色
        layer.shadowColor = black_Color.CGColor;
        // 阴影偏移，默认(0, -3)
        layer.shadowOffset = CGSizeMake(0,-3);
        // 阴影透明度，默认0
        layer.shadowOpacity = 0;
        if (addLine == YES) {
            //设置分割线
            CALayer *lineLayer = [[CALayer alloc] init];
            CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
            lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight);
            lineLayer.backgroundColor = tableView.separatorColor.CGColor;
            [layer addSublayer:lineLayer];
        }
        //设置背景view
        UIView *clickBgView = [[UIView alloc] initWithFrame:bounds];
        [clickBgView.layer insertSublayer:layer atIndex:0];
        clickBgView.backgroundColor = UIColor.clearColor;
        cell.backgroundView = clickBgView;
    }
}

本文地址：https://blog.csdn.net/smileKH/article/details/108738305