CODEWITHSUNDEEP
objective-ciosuitextfielduitextview
Halen
Halen

Reputation: 456

Shadowing a UITextview like a UITextField

I have searched apple's documentation and other posts on Stack Overflow, but I'm still having trouble adding a shadow to the inside of a UITextView. I would like to make it look like a UITextField. Here's the code that I've tried.

CALayer *frontLayer = self.frontField.layer;
[frontLayer setBorderColor:CGColorCreate(CGColorSpaceCreateDeviceGray(), nil)];
[frontLayer setBorderWidth:1];
[frontLayer setCornerRadius:5];
[frontLayer setShadowRadius:10.0];
CGSize shadowOffset = {0.0,3.0};
[frontLayer setShadowOffset:shadowOffset];
[frontLayer setShadowOpacity:1];
self.frontField.clipsToBounds = YES;

Where am I going wrong?

Upvotes: 2

Views: 3700

Answers (2)

Vame
Vame

Reputation: 2053

According to 25 iOS performance tips & tricks, adding shadow by setting shadowOffset is an expensive operation and affects performance.

Core Animation has to do an offscreen pass to first determine the exact shape of your view before it can render the drop shadow, which is a fairly expensive operation.

You can use instead:

myTextView.layer.shadowPath = [[UIBezierPath bezierPathWithRect:view.bounds] CGPath];

Upvotes: 0

Michael Frederick
Michael Frederick

Reputation: 16714

Start off simple and try this:

[myTextView.layer setShadowColor:[[UIColor blackColor] CGColor]];
[myTextView.layer setShadowOffset:CGSizeMake(1.0, 1.0)];
[myTextView.layer setShadowOpacity:1.0];
[myTextView.layer setShadowRadius:0.3];
[myTextView.layer.masksToBounds = NO]; //<-- for UITextView!

to optimise performance also add: 

view.layer.shadowPath = [UIBezierPath bezierPathWithRect:myTextView.bounds].CGPath;

Then you can add your other properties back in 1 by 1 and see what is causing an issue for you.

Upvotes: 2

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