Programmatically adding a shadow to a UIButton label

问题

I'm trying to add a 1px black drop shadow to a button label with no luck. I've tried this:self.setTitleShadowOffset = CGSizeMake(0, -1); but I get:

Request for member 'setTitleShadowOffset' in something not a structure or union

Any suggestions would be fantastic thanks!

回答1:

The other answers do not properly set the shadow color (I suspect they didn't notice because they were trying to set the shadow color to what it is by default, black.)

This code worked for me to add a white shadow to the text of my button:

myButton.titleLabel.shadowOffset = CGSizeMake(0, 1);
[myButton setTitleShadowColor:[UIColor whiteColor] forState:UIControlStateNormal];

回答2:

The right property is self.titleLabel.shadowOffset:

UIButton *b = [UIButton buttonWithType:UIButtonTypeRoundedRect];    
[b setTitleShadowColor:[UIColor purpleColor] forState:UIControlStateNormal];
b.titleLabel.shadowOffset = CGSizeMake(1.0, 1.0);
[b setTitle:@"Hello, I'm a Button" forState:UIControlStateNormal];
b.frame = CGRectMake(10.0, 10.0,300.0, 40.0);

回答3:

The setTitleShadowOffset for UIButton is deprecated. Use the shadowOffset of titleLabel property of UIButton

buttonName.titleLabel.shadowOffset = CGSizeMake(0, -1);

回答4:

In Swift 3.0

myButton.titleLabel?.layer.shadowRadius = 3
myButton.titleLabel?.layer.shadowColor = UIColor.black.cgColor
myButton.titleLabel?.layer.shadowOffset = CGSize(width: 0, height: 1)
myButton.titleLabel?.layer.shadowOpacity = 0.5
myButton.titleLabel?.layer.masksToBounds = false

回答5:

for Swift 3:

  button.setTitleShadowColor(UIColor.red, for: .normal)
  button.titleLabel?.shadowOffset = CGSize(width: 2, height: 2)

回答6:

Here is how to add shadow to the button title in Objective-C with radius property:

#import <QuartzCore/QuartzCore.h>    

button.titleLabel.layer.shadowOffset = CGSizeMake(2.0, 2.0);
button.titleLabel.layer.shadowColor = [UIColor colorWithWhite:0.1 alpha:0.7].CGColor;
button.titleLabel.layer.shadowRadius = 2.0;
button.titleLabel.layer.shadowOpacity = 1.0;
button.titleLabel.layer.masksToBounds = NO;

来源：https://stackoverflow.com/questions/5178896/programmatically-adding-a-shadow-to-a-uibutton-label