button上的图片显示蓝色

UIButton *headImg = [UIButton
buttonWithType:UIButtonTypeCustom];
headImg.frame =
CGRectMake((UISCREEN_WIDTH-60)/2,
5, 60,
60);

[headImg
setImage:[UIImage
imageNamed:@"我的.png"]
forState:UIControlStateNormal];

headImg.layer.masksToBounds =
YES;

headImg.layer.cornerRadius =
30;

headImg.layer.borderWidth =
1;

headImg.layer.borderColor = [UIColor
redColor].CGColor;
headImg.tag =
2;

[headImg
addTarget:self action:@selector(gotoView:) forControlEvents:UIControlEventTouchUpInside];
[self.view
addSubview:headImg];

问题没有解决前的图片：