- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { if ([cell respondsToSelector:@selector(tintColor)]) { if (tableView == self.aTableView) { CGFloat cornerRadius = 5.f; cell.backgroundColor = UIColor.clearColor; CAShapeLayer *layer = [[CAShapeLayer alloc] init]; CGMutablePathRef pathRef = CGPathCreateMutable(); CGRect frame = cell.bounds; frame.origin.x = frame.origin.x+5; frame.size.width = frame.size.width-20; CGRect bounds = frame; 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; } } }
/** * 计算方式: step1:数一下一行能显示几个汉字 step2:算一下一共几行 step3:如果汉字不满一行按一行一算 step4:用行数乘以行高 */ int lineCount = 20; CGFloat lbContentHeight = lbQ.text.length / lineCount; if (lbQ.text.length % lineCount) { lbContentHeight++; } lbContentHeight *= 20;