相关疑难解决方法(0)

当我UIBarButtonItem通过Interface Builder 向a添加图标时,图标显示为白色.当我以编程方式将相同的图标文件添加到另一个图标文件时UIToolbar,图标显示为黑色.为什么？

UIImage *image = [UIImage imageNamed:@"icon.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:image forState:UIControlStateNormal];
rootViewController.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:reloadButton] autorelease];