ios - UITableView 部分周围的边框

Question

我们如何才能在表格 View 的每个部分周围设置边框？附件是显示我正在寻找的内容的图像。如果您查看图像，它的每个表格 View 部分周围都有一个边框。

Answer 1

对于这个问题，我改编了 jvanmetre对于圆角 tableview 角的答案，只需添加带有以下代码的 tableView:willDisplayCell:forRowAtIndexPath: 委托(delegate)方法(简单的复制/粘贴应该可以)，它也应该适用于分组表。我评论了你应该在哪里设置边框的宽度和颜色。

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
    {

    if ([cell respondsToSelector:@selector(tintColor)]) {
        CGFloat cornerRadius = 5.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);
        //set the border color
        layer.strokeColor = [UIColor lightGrayColor].CGColor;
        //set the border width
        layer.lineWidth = 1;
        layer.fillColor = [UIColor colorWithWhite:1.f alpha:1.0f].CGColor;


        if (addLine == YES) {
            CALayer *lineLayer = [[CALayer alloc] init];
            CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
            lineLayer.frame = CGRectMake(CGRectGetMinX(bounds), bounds.size.height-lineHeight, bounds.size.width, lineHeight);
            lineLayer.backgroundColor = tableView.separatorColor.CGColor;
            [layer addSublayer:lineLayer];
        }

        UIView *testView = [[UIView alloc] initWithFrame:bounds];
        [testView.layer insertSublayer:layer atIndex:0];
        testView.backgroundColor = UIColor.clearColor;
        cell.backgroundView = testView;
    }
}

此外，请记住在 Interface Builder 中将表的分隔符属性设置为 none(默认情况下为单行)，如果您以编程方式创建表，则应该像这样设置属性

yourTableView.separatorStyle = UITableViewCellSeparatorStyleNone