栏按钮项目图像变为白色图标，即使它是黑色的

Question

我将这些图标用作工具栏中的条形按钮项
http://stopiransnukes.org/images/home_icon.png
和
http://www.bladmuziekplus.nl/shop/files/images/icon_home.png
但是背景图像即使是黑色也会自动转换为白色。

我尝试通过代码设置图像背景，但仍然变成白色。

手动：我已将上面的图像拖放到项目中。我选择了条形按钮项目，并在右侧栏（盾牌图标）上的第 4 个选项选择不同的色调，并在条形按钮下拉图像设置为上图。

以编程方式：

  [self.homeButton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor blackColor], UITextAttributeTextColor,nil] forState:UIControlStateNormal];

   [[self.homeButton] setImage:[UIImage imageNamed:@"home_icon.png"]];

我该如何解决？
提前致谢。

.

Answer 1

这是将图像添加到UIButton 并将UIButton 作为custom view 添加到UIBarButtonItem 中的storyboard 本身的分步过程。我将为您添加一些图像完全理解这一点..

步骤 1： 将 toolbar 拖放到 storyboard 视图中

第 2 步：将UIButton 拖放到您的view 中

第 3 步：将图片拖放到您的UIButton

步骤 4： 将 UIButton 拖放到工具栏中，现在您可以在右侧将其添加到 UIBarButtonItem 内。现在您只需为您的按钮连接一个操作方法。

Answer 2

viewDidLoad

[super viewDidLoad];

//uıbarButtonItem firstButtonItem,secondButtonItem
UIImage* firstButtonImage = [UIImage imageNamed:@"firstImageName"];;
CGRect frameimg = CGRectMake(0, 0, 30, 30);
UIButton * someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:firstButtonImage forState:UIControlStateNormal];
[someButton addTarget:self action:@selector(goToUserProfile)
     forControlEvents:UIControlEventTouchUpInside];
self.firstButtonItem = [[UIBarButtonItem alloc] initWithCustomView:someButton];


UIImage* secondButtonImage = [UIImage imageNamed:@"secondImageName"];
frameimg = CGRectMake(0, 0, 30, 30);
someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:secondButtonImage forState:UIControlStateNormal];
[someButton addTarget:self action:@selector(likePhoto)
     forControlEvents:UIControlEventTouchUpInside];
[someButton setTag:1];
self.secondButtonItem = [[UIBarButtonItem alloc] initWithCustomView:someButton];

[self.toolbar setItems:[self addItemsToToolbar]];

AddItemsToToolbar 方法

- (NSMutableArray *)addItemsToToolbar{
NSMutableArray *items = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[items addObject:flexSpace];
[items addObject:self.firstButtonItem];
[items addObject:flexSpace];
[items addObject:self.secondButtonItem];
return items;

}

Answer 3

这是正常行为，您可以在人机界面指南中阅读。

http://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/IconsImages/IconsImages.html#//apple_ref/doc/uid/TP40006556-CH14-SW8

如果你想改变，你需要编写自己的子类。

Answer 4

UIImage* infoButtonImage = [UIImage imageNamed:@"info_button.png"];;
CGRect frameimg = CGRectMake(0, 0, infoButtonImage.size.width, infoButtonImage.size.height);
UIButton * someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:infoButtonImage forState:UIControlStateNormal];
[someButton addTarget:self action:@selector(actionOfButton)
     forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem * infoButton = [[UIBarButtonItem alloc] initWithCustomView:someButton];

此代码将解决您的问题