ios如何在一个UIImageButton的里面加一些自定义的箭头

-(UIImage*) getOneImageButtonWithArrow{

//tmpView做附控件

UIView *tmpView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 38.0f, 32.0f)];

tmpView.backgroundColor = [UIColor clearColor];

//bgImg作为背景

UIImage* bgImg = [UIImage imageNamed:@"background.png"];

UIImageView *bgImageView = [[UIImageView alloc] initWithImage:bgImg];

bgImageView.frame = tmpView.frame;

//加入tmpView

[tmpView addSubview:bgImageView];

[bgImageView release];

//里面的icon

UIImageView *tmpImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon.png"]];

tmpImageView.frame = CGRectMake(4.0f, 4.0f, 24.0f, 24.0f);

tmpImageView.backgroundColor = [UIColor clearColor];

tmpImageView.alpha = 1.0f;

[tmpView addSubview:tmpImageView];

//箭头

UIImage *arrowImage = [UIImage imageNamed:@"arrow.png"];

UIImageView *arrowImageView = [[UIImageView alloc] initWithImage:arrowImage];

arrowImageView.frame = CGRectMake(28.0f, 4.0f, 6.0f, 24.0f);

[tmpView addSubview:arrowImageView];

//获取上下文，得到这个UIImage

UIGraphicsBeginImageContextWithOptions(tmpView.bounds.size, NO, 0.0);

[tmpView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *tmpImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return tmpImage;

}