objective C 自定义一个button的类，出现NSGenericException error

Question

使用storyboard拖一个button，然后指定button的custom class，class 如下:

h file:

@interface CustomizationButton : UIButton

@end

m file:

@implementation CustomizationButton

-(id) initWithCoder:(NSCoder *)aDecoder {
if((self = [super initWithCoder:aDecoder])){
    self.layer.cornerRadius = 4.0;
    self.clipsToBounds = true;
    self.backgroundColor = [UIColor colorWithRed:69/255 green:83/255 blue:153/255 alpha:1];
}
return nil;
}

-(void) setHighlighted:(BOOL)highlighted {
[super setHighlighted:highlighted];

if(highlighted){
    self.backgroundColor = [UIColor colorWithRed:83/255 green:98/255 blue:178/255 alpha:1];
} else {
    self.backgroundColor = [UIColor colorWithRed:69/255 green:83/255 blue:153/255 alpha:1];
}
}

@end

错误如下

Terminating app due to uncaught exception 'NSGenericException', reason: 'This coder requires that replaced objects be returned from initWithCoder:'

Answer 1

你 initWithCoder 最后 return nil 是手误吧？

Answer 2

最后应该 return self

Answer 3

return self