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我在网上查看过，但我的结果主要包括“如何进行 shadowOffset”。我需要将“阴影、边框和角半径”应用于视图中的多个对象。我只是想看看是否有更有效的方法？或者，如果有办法让它更有条理。这是我的一些代码。请记住，我有多个这样的视图，所以这段代码占用的空间非常烦人。

topView.layer.cornerRadius = 3;
topView.layer.masksToBounds = YES;
topView.layer.borderColor= [UIColor lightGrayColor].CGColor;
topView.layer.borderWidth = 0.5f;

bottomView.layer.cornerRadius = 3;
bottomView.layer.masksToBounds = YES;
bottomView.layer.borderColor= [UIColor lightGrayColor].CGColor;
bottomView.layer.borderWidth = 0.5f;

eventName.layer.masksToBounds = NO;
eventName.layer.shadowColor = [UIColor blackColor].CGColor;
eventName.layer.shadowOpacity = 0.5;
eventName.layer.shadowRadius = 2;
//(right,down) also (-right,-down)
eventName.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);

addressLabel.layer.masksToBounds = NO;
addressLabel.layer.shadowColor = [UIColor blackColor].CGColor;
addressLabel.layer.shadowOpacity = 0.5;
addressLabel.layer.shadowRadius = 2;
//(right,down) also (-right,-down)
addressLabel.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);

dateLabel.layer.masksToBounds = NO;
dateLabel.layer.shadowColor = [UIColor blackColor].CGColor;
dateLabel.layer.shadowOpacity = 0.5;
dateLabel.layer.shadowRadius = 2;
//(right,down) also (-right,-down)
dateLabel.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);

typeLabel.layer.masksToBounds = NO;
typeLabel.layer.shadowColor = [UIColor blackColor].CGColor;
typeLabel.layer.shadowOpacity = 0.5;
typeLabel.layer.shadowRadius = 2;
//(right,down) also (-right,-down)
typeLabel.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);

eventCaption.layer.masksToBounds = NO;
eventCaption.layer.shadowColor = [UIColor blackColor].CGColor;
eventCaption.layer.shadowOpacity = 0.5;
eventCaption.layer.shadowRadius = 2;
//(right,down) also (-right,-down)
eventCaption.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);
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1 回答 1

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如果您的大多数阴影是相同的，您可以选择循环遍历视图的数组（或一组，因为您并不真正关心它应用到的项目的顺序）以应用相同的阴影？也就是说，我在您粘贴在这里的代码中看到了两种阴影，浅灰色和黑色。您可以执行以下操作：

NSArray * blackShadowItems = @[eventName, addressLabel, dateLabel];
for (UIView * view in blackShadowItems) {
    view.layer.masksToBounds = NO;
    view.layer.shadowColor = [UIColor blackColor].CGColor;
    view.layer.shadowOpacity = 0.5;
    view.layer.shadowRadius = 2;
    //(right,down) also (-right,-down)
    view.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);
}

或声明另一个函数：

- (void)setBlackShadow:(UIView *)view {
    view.layer.masksToBounds = NO;
    view.layer.shadowColor = [UIColor blackColor].CGColor;
    view.layer.shadowOpacity = 0.5;
    view.layer.shadowRadius = 2;
    //(right,down) also (-right,-down)
    view.layer.shadowOffset = CGSizeMake(0.0f, 0.8f);
}

您可以将这两种解决方案结合起来。

最后，请注意，如果这些视图是在 .xib 文件中声明的，则可以声明一个 IBOutletCollection 以根据要在其上设置的阴影类型重新组合视图。这与自己声明 NSArray 或 NSSet 非常相似。

于 2013-07-18T16:24:14.530 回答