ios 自定义Button 不能点击问题

- (id)initWithFrame:(CGRect)frame
{
self = [super
initWithFrame:frame];
if (self) {

self.userInteractionEnabled =
YES;
[self
createButton];
}
return
self;
}

-(void)createButton
{
_rightLabel = [[UILabel
alloc]init];
_rightLabel.frame =
CGRectMake(10, 0,
100-10,30);
NSLog(@"%f %f",self.frame.size.height,self.frame.size.width);
_rightLabel.text =
@"999999";
_rightLabel.textColor = [UIColor
whiteColor];

// _rightLabel.userInteractionEnabled = YES;(罪魁祸首)
_rightLabel.textAlignment =
NSTextAlignmentCenter;
[self
addSubview:_rightLabel];

}

在uibutton里面定义的元素的userInteractionEnabled不能打开,今天郁闷死了.最后找的了原来是它.