用stackview写布局，make.right.equalTo(self.scrollView.mas_right)不管用

[LxxWLxx]

约束stackview右边框不管用，而且添加的imageview超出视图，
[self.verticalStackView mas_makeConstraints:^(MASConstraintMaker *make) {

make.top.equalTo(self.scrollView.mas_top).offset(10);
make.left.equalTo(self.scrollView.mas_left).offset(6);
make.right.equalTo(self.scrollView.mas_right).offset(6);
make.bottom.equalTo(self.scrollView);
}];
-(UIImageView*)imageView{

if (!_imageView) {
_imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"威控图片"]];
_imageView.contentMode = UIViewContentModeScaleAspectFill;
}
return _imageView;
}

求各位大佬帮忙！！！