- (void)handleWillDisplayCellWithIndexPath:(NSIndexPath *)indexPath
numberOfRows:(NSInteger)count;{
CGRect bounds = CGRectInset(self.bounds, 10, - 1);
/*
为了切割掉多余的投影
将顶部和底部的backgroundView进行一些偏移,并且打开裁剪
*/
if (count > 1) {
if (indexPath.row == 0) {
bounds = CGRectMake(10, 3, self.bounds.size.width - 20, self.bounds.size.height + 3);
} else if (indexPath.row == count - 1) {
bounds = CGRectMake(10, -5, self.bounds.size.width - 20, self.bounds.size.height + 3);
}
}
UIView *backgroundView = [[UIView alloc] initWithFrame:bounds];
if (count > 1) {
backgroundView.clipsToBounds = YES;
}
self.backgroundView = backgroundView;
/*
将背景色都设置为透明色,以方便自定义
*/
backgroundView.backgroundColor =
self.backgroundColor =
self.contentView.backgroundColor = UIColor.clearColor;
CAShapeLayer *layer = [[CAShapeLayer alloc] init];
layer.shadowColor = [UIColor cyanColor].CGColor;
layer.shadowOffset = CGSizeZero;
layer.shadowOpacity = 0.5;
layer.fillColor = [UIColor whiteColor].CGColor;
UIBezierPath*path = [UIBezierPath bezierPathWithRect:bounds];
CGSize cornerRadii = CGSizeZero;
UIRectCorner corners = UIRectCornerAllCorners;
/*
1.当数量大于1时
1.1 第一行实现顶部圆角,最后一行实现底部圆角,中间部分不加圆角
1.2 当不是第一行的时候,添加分割线
2.当数量为1时(只有一行)
2.1实现全圆角
*/
if (count > 1) {
if (indexPath.row == 0) {
cornerRadii = CGSizeMake(10, 10);
corners = UIRectCornerTopLeft | UIRectCornerTopRight;
} else if(indexPath.row == count - 1) {
cornerRadii = CGSizeMake(10, 10);
corners = UIRectCornerBottomLeft | UIRectCornerBottomRight;
}
if (corners != UIRectCornerAllCorners) {
path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:corners cornerRadii:cornerRadii];
} else {
path = [UIBezierPath bezierPathWithRect:bounds];
}
if (indexPath.row != 0) {
CALayer *border=[[CALayer alloc] init];
border.frame = CGRectMake(CGRectGetMinX(bounds),0, CGRectGetWidth(bounds), 1/[UIScreen mainScreen].scale);
border.backgroundColor=[UIColor separatorColor].CGColor;
[layer addSublayer:border];
}
}else {
cornerRadii = CGSizeMake(10, 10);
path =[UIBezierPath bezierPathWithRoundedRect:bounds
byRoundingCorners:UIRectCornerAllCorners
cornerRadii:cornerRadii];
}
layer.path = path.CGPath;
[backgroundView.layer insertSublayer:layer atIndex:0];
}
Simulator Screen Shot - iPod touch (7th generation) - 2021-06-13 at 08.57.29.png
Simulator Screen Shot - iPod touch (7th generation) - 2021-06-13 at 08.57.33.png
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