如何避免UIToolbar的tintColor更改UIButtonItem按钮颜色？

Question

在iOS7中,我UIBarButtonItem使用颜色为绿色的图像创建了一个和init.但是该图像的最终外观 UIBarButtonItem是具有相同形状但颜色不同的图像.颜色变为蓝色.

代码如下:

_recordVoiceItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"voiceIcon"] style:UIBarButtonItemStylePlain target:self action:nil];

    _textView = [[UITextView alloc] initWithFrame:CGRectMake(40, 4, 220, BOTTOM_BAR_HEIGHT - 2*4)];
    _textView.layer.borderWidth = 1.f;

    _rightItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"modeIcon"] style:UIBarButtonItemStylePlain target:self action:nil];

    _bottomBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, self.view.frame.origin.y + self.view.frame.size.height - BOTTOM_BAR_HEIGHT, self.view.frame.size.width, BOTTOM_BAR_HEIGHT)];

    _bottomBar.items = @[_recordVoiceItem,[[UIBarButtonItem alloc] initWithCustomView:_textView],_rightItem];

    [self.view addSubview:_bottomBar];

我试图UIToolBar通过Interface Builder 创建并添加一些项目.外观很好.在颜色UIBarButtonItem的图像是起源图像的颜色.

我怀疑我需要添加一些代码来设置一些属性,UIToolBar或者UIBarButtonItem如果我想通过编写代码.你能告诉我怎么做吗？

Answer 1

虽然它不应该是必需的,但是自iOS7以来我的彩色UIBarButtonItem完成了:

对于目标C:

UIImage* itemImage= [UIImage imageNamed:@"menu.png"]; // Colored Image
itemImage         = [itemImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
_itemButton       = [[UIBarButtonItem alloc] initWithImage:itemImage style:UIBarButtonItemStyleBordered target:self action:@selector(itemSelected:event:)];

UIImageRenderingModeAlwaysOriginal是这里的关键.

对于Swift 3:

    // Use the colored image menu.png as a UIBarButtonItem
    if var itemImage   = UIImage(named: "menu") {
        itemImage      = itemImage.withRenderingMode(.alwaysOriginal)
        let itemButton = UIBarButtonItem(image: itemImage, style: .plain, target: self, action: #selector(self.itemSelected(_:)))

        self.navigationItem.rightBarButtonItem  = itemButton
    }

再次,.withRenderingMode(.alwaysOriginal)是这里的关键.