iOS7之后Apple大大极力推行扁平化。各种App的风格从立体的变成平面，形态上从丰富变得简约。

• iOS6下的TableView是这样子的

带有明显圆角风格

• 而iOS7下的TableView是这样子的

又扁又平棱角分明

• 可是问题来了。如何在新版的iOS系统上实现旧版的样式呢？

找一找系统有没有保留旧的样式接口？骚年，这条路不行。
目前实现的方法就是自己手写样式，在cell上动手脚。具体怎么实现的，请往下看。

//在tableView即将显示cell的时候改动cell的样式，通常cell展示动画也是在这里做的。
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    if ([cell respondsToSelector:@selector(tintColor)]) {
        
        if (tableView == self.tableView) {
            
            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);
            
            layer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor;

            if (addLine == YES) {
                
                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];
                
            }
            
            UIView *testView = [[UIView alloc] initWithFrame:bounds];
            
            [testView.layer insertSublayer:layer atIndex:0];
            
            testView.backgroundColor = UIColor.clearColor;
            
            cell.backgroundView = testView;
            
        }
    }
}

• 代码就这多，具体实现多看看就懂了。

全文完。