17

我正在尝试显示带有圆角和阴影的 UIView。但问题是 maskToBounds 属性仅适用于任何一种情况。

如果 maskToBounds 为 YES，则显示圆角，如果为 NO，则显示阴影。这是实现，但它只显示没有阴影的圆角：

[self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"blue_gradient.jpeg"]]];


    self.view.layer.masksToBounds = YES; 
    self.view.layer.opaque = NO; 
    self.view.layer.cornerRadius = 15.0f; 


    self.view.layer.shadowColor = [UIColor blackColor].CGColor;
    self.view.layer.shadowRadius = 5.0; 
    self.view.layer.shadowOffset = CGSizeMake(3.0, 3.0);
    self.view.layer.shadowOpacity = 0.9f;

想法！

注意：我已经阅读并实现了以下线程中的代码，但它不起作用： 带有圆角和阴影的 UIView？

更新 1：

我试图创建两个单独的视图。一个代表半径，一个代表阴影。问题是在半径视图顶部创建阴影，如下面的屏幕截图所示：

在此处输入图像描述

H

ere is the code: 

 self.view.layer.masksToBounds = YES; 
    self.view.layer.opaque = NO; 
    self.view.layer.cornerRadius = 15.0f; 
   // self.view.backgroundColor = [UIColor clearColor];
    self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blue_gradient.jpeg"]];
//
    UIView *shadowView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    shadowView.layer.shadowColor = [UIColor blackColor].CGColor;
    shadowView.layer.shadowRadius = 2.0; 
    shadowView.backgroundColor = [UIColor clearColor];
    shadowView.layer.shadowOffset = CGSizeMake(3.0, 3.0);
    shadowView.layer.shadowOpacity = 0.9f;
    shadowView.layer.shadowPath = [UIBezierPath 
                                                                   bezierPathWithRect:CGRectMake(0, 0, 100, 100)].CGPath;

    [self.view addSubview:shadowView];

更新 2：

倒过来还是不行。不创建圆角。

UIView *roundCornerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    roundCornerView.layer.masksToBounds = YES; 
    roundCornerView.layer.opaque = NO; 
    roundCornerView.layer.cornerRadius = 15.0f; 

    self.view.layer.shadowColor = [UIColor blackColor].CGColor;
    self.view.layer.shadowRadius = 2.0; 
    //self.view.backgroundColor = [UIColor clearColor];
    self.view.layer.shadowOffset = CGSizeMake(3.0, 3.0);
    self.view.layer.shadowOpacity = 0.9f;
    self.view.layer.shadowPath = [UIBezierPath 
                                                                   bezierPathWithRect:CGRectMake(0, 0, 100, 100)].CGPath;

    [self.view addSubview:roundCornerView];

解决方案： 

 UIView *roundCornerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    roundCornerView.layer.masksToBounds = YES; 
    roundCornerView.layer.opaque = NO; 
    roundCornerView.layer.cornerRadius = 15.0f; 

    roundCornerView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blue_gradient.jpeg"]];

    self.view.layer.shadowColor = [UIColor blackColor].CGColor;
    self.view.layer.shadowRadius = 2.0; 
    self.view.backgroundColor = [UIColor clearColor];
    self.view.layer.shadowOffset = CGSizeMake(3.0, 3.0);
    self.view.layer.shadowOpacity = 0.9f;
    //self.view.layer.shadowPath = [UIBezierPath 
      //                                                             bezierPathWithRect:CGRectMake(0, 0, 100, 100)].CGPath;

    [self.view addSubview:roundCornerView];
4

3 回答 3

11

创建两个视图。一个带有阴影（并且不要忘记设置 shadowPath），您可以在其中添加带有cornerRadius和的子视图maskToBounds。

于 2012-07-11T17:15:04.597 回答
10

接受的答案不包含任何代码，因此这里是 Swift 中的一个示例（有关 OP 在 Obj-C 中的解决方案，请参阅原始问题）。

在此处输入图像描述

与公认的答案一样，此解决方案对阴影和角半径使用单独的视图。

// add the shadow to the base view
baseView.backgroundColor = UIColor.clear
baseView.layer.shadowColor = UIColor.black.cgColor
baseView.layer.shadowOffset = CGSize(width: 3, height: 3)
baseView.layer.shadowOpacity = 0.7
baseView.layer.shadowRadius = 4.0

// improve performance
baseView.layer.shadowPath = UIBezierPath(roundedRect: baseView.bounds, cornerRadius: 10).cgPath
baseView.layer.shouldRasterize = true
baseView.layer.rasterizationScale = UIScreen.main.scale

// add the border to subview
let borderView = UIView()
borderView.frame = baseView.bounds
borderView.layer.cornerRadius = 10
borderView.layer.borderColor = UIColor.black.cgColor
borderView.layer.borderWidth = 1.0
borderView.layer.masksToBounds = true
baseView.addSubview(borderView)

// add any other subcontent that you want clipped
let otherSubContent = UIImageView()
otherSubContent.image = UIImage(named: "lion")
otherSubContent.frame = borderView.bounds
borderView.addSubview(otherSubContent)

我的完整答案在这里。

于 2016-01-25T06:23:09.050 回答
1

您可以通过应用以下内容在单个视图中执行此操作：

1.首先添加一个圆角半径

yourview.layer.cornerRadius = 5.0

2.调用下面的函数

shadowToView(view : yourview)


func shadowToView(view : UIView){
    view.layer.shadowOffset = CGSize(width: 0, height: 3)
    view.layer.shadowOpacity = 0.6
    view.layer.shadowRadius = 3.0
    view.layer.shadowColor = UIColor.darkGray.cgColor
}
于 2018-11-29T14:42:44.273 回答