iphone - 使用 initWithImage :(UIImage *)image 将图像添加到 UIBarButtonItem

Question

我想知道如何在创建 UIBarButtonItem 时使用 InitWithImage 将图像设置为 UIBarButtonItem，然后将其添加到 UIToolbar。

我正在执行以下操作，但它会在图像应位于 UIToolbar 上的位置创建一个空白

UIImage *image = [UIImage imageNamed:@"6.png"];

UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStylePlain target:self action:@selector(pp:)];

谢谢!

Answer 1

对于 iOS 7+，您需要执行以下操作:

Objective-C

 UIImage *image = [[UIImage imageNamed:@"myImage.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
 UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStylePlain target:self action:@selector(YOUR_METHOD:)];

swift 2.3

 let image = UIImage(named: "myImage")?.imageWithRenderingMode(.AlwaysOriginal)
 let button = UIBarButtonItem(image: image, style: .Plain, target: self, action: #selector(YOUR_METHOD(_:)))

swift 3.0

let image = UIImage(named: "myImage")?.withRenderingMode(.alwaysOriginal)
let button = UIBarButtonItem(image: image, style: .plain, target: self, action: #selector(YOUR_METHOD(_:)))