IOS:如何在4面(上、右、下、左)为UIView制作阴影
IOS:如何在4面(上、右、下、左)为UIView制作阴影
提问于 2016-03-23 16:26:16
我正在使用下面的代码为我的ImageView制作阴影
UIBezierPath *shadowPath = [UIBezierPath bezierPathWithRect:self.avatarImageView.bounds];
self.avatarImageView.layer.masksToBounds = NO;
self.avatarImageView.layer.shadowColor = [UIColor blackColor].CGColor;
self.avatarImageView.layer.shadowOffset = CGSizeMake(5.0f, 5.0f);
self.avatarImageView.layer.shadowOpacity = 0.8f;
self.avatarImageView.layer.shadowPath = shadowPath.CGPath;它将在右侧和底部放置一个阴影，如下图所示。
现在我想让我的ImageView在左上角也有一个阴影。我应该在代码中修改什么？是否可以在代码中仅通过配置使视图在顶部、右侧、底部、左侧包含阴影，或者我需要为阴影创建其他布局视图？任何帮助都将不胜感激。
以下是我想要实现的目标
更新
感谢@Dipen Panchasara给出了一个简单的解决方案。关注@Dipen Panchasara (阴影颜色是黑色)我会有这样的阴影图像
回答 11
Stack Overflow用户
回答已采纳
发布于 2016-03-23 16:38:44
如下所示：
float shadowSize = 10.0f;
UIBezierPath *shadowPath = [UIBezierPath bezierPathWithRect:CGRectMake(self.avatarImageView.frame.origin.x - shadowSize / 2,
self.avatarImageView.frame.origin.y - shadowSize / 2,
self.avatarImageView.frame.size.width + shadowSize,
self.avatarImageView.frame.size.height + shadowSize)];
self.avatarImageView.layer.masksToBounds = NO;
self.avatarImageView.layer.shadowColor = [UIColor blackColor].CGColor;
self.avatarImageView.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);
self.avatarImageView.layer.shadowOpacity = 0.8f;
self.avatarImageView.layer.shadowPath = shadowPath.CGPath;Swift 3版本：
let shadowSize : CGFloat = 5.0
let shadowPath = UIBezierPath(rect: CGRect(x: -shadowSize / 2,
y: -shadowSize / 2,
width: self.avatarImageView.frame.size.width + shadowSize,
height: self.avatarImageView.frame.size.height + shadowSize))
self.avatarImageView.layer.masksToBounds = false
self.avatarImageView.layer.shadowColor = UIColor.black.cgColor
self.avatarImageView.layer.shadowOffset = CGSize(width: 0.0, height: 0.0)
self.avatarImageView.layer.shadowOpacity = 0.5
self.avatarImageView.layer.shadowPath = shadowPath.cgPathStack Overflow用户
发布于 2016-03-23 16:38:59
只需要下面的代码就可以满足你的需求，你不需要为影子路径创建UIBezierPath。
// *** Set masks bounds to NO to display shadow visible ***
self.avatarImageView.layer.masksToBounds = NO;
// *** Set light gray color as shown in sample ***
self.avatarImageView.layer.shadowColor = [UIColor lightGrayColor].CGColor;
// *** *** Use following to add Shadow top, left ***
self.avatarImageView.layer.shadowOffset = CGSizeMake(-5.0f, -5.0f);
// *** Use following to add Shadow bottom, right ***
//self.avatarImageView.layer.shadowOffset = CGSizeMake(5.0f, 5.0f);
// *** Use following to add Shadow top, left, bottom, right ***
// avatarImageView.layer.shadowOffset = CGSizeZero;
// avatarImageView.layer.shadowRadius = 5.0f;
// *** Set shadowOpacity to full (1) ***
self.avatarImageView.layer.shadowOpacity = 1.0f;Stack Overflow用户
发布于 2017-05-16 02:15:04
swift 3的代码少了一点：
view.layer.shadowColor = UIColor.black.cgColor
view.layer.shadowOpacity = 0.7
view.layer.shadowOffset = CGSize.zero
view.layer.shadowRadius = 4
view.layer.shadowPath = UIBezierPath(rect: planView.bounds).cgPath页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36173052
复制相关文章
相似问题
腾讯云开发者
