使用QuartzCore为UITextView创建阴影 [英] Create shadow using QuartzCore for UITextView
问题描述
我使用以下代码使用 QuartzCore 为我的 UITextView 创建了一个阴影。
I have created a shadow using QuartzCore for my UITextView with this following code.
myTextView.layer.masksToBounds = NO;
myTextView.layer.shadowColor = [UIColor blackColor].CGColor;
myTextView.layer.shadowOpacity = 0.7f;
myTextView.layer.shadowOffset = CGSizeMake(2.0f, 2.0f);
myTextView.layer.shadowRadius = 8.0f;
myTextView.layer.shouldRasterize = YES;
它创建一个阴影和看起来也不错。这是我上面代码的输出。
It creates a shadow and looks good too. Here it is my output for the above code.
但是当我尝试向添加文本时myTextView ，我的textView文本超出界限，它看起来像 myTextView 之外的那样。
But When I try to add a text to the myTextView, my textView text goes out of the bounds and it looks outside of the myTextView like below.
只有在我添加阴影时才会发生这种情况。 textView 里面的文字没有显示怪异如果我不添加阴影。我做错了什么？我怎么能克服这个？为什么会这样？
It's happening only when I add shadow. The text inside the textView is not showing weird If I don't add shadow.What I am doing wrong?? How could I overcome this? Why it is happening?
更新：
@borrrden 说
我发现它正在发生，因为设置 maskToBounds = NO; 如果我们设置是然后我们无法获得影子。原因这是一个答案
@borrrden said
I found It is happening, because of setting the maskToBounds = NO; If we set YES then we cannot get shadow. Reason Here it is an answer
推荐答案
由于UIView行为，没有正确的解决方案。当masksToBounds为NO时，任何延伸到图层边界外的子图层都将可见。并且UITextField在UITextField图层外滚动文本。
There is no "right" solution, because of UIView behavior. When masksToBounds is NO, any sublayers that extend outside the layer's boundaries will be visible. And UITextField scroll text outside the UITextField layer.
在UITextView后添加清晰视图并在其上放一个阴影。
Add clear view behind the UITextView and drop a shadow on it.
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