具有普通样式的UINavigationBar BarButtonItem

Question

我收到了以下代码：

- (id)init {
  if (self = [super init]) {
      self.title = @"please wait";
      UIBarButtonItem *favorite = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"star.png"] style:UIBarButtonItemStylePlain target:self action:@selector(buttonFavoriteClicked:)];
      self.navigationItem.rightBarButtonItem = favorite;
  }

  return self;
}

但我的按钮看起来仍然像一个带有UIBarButtonItemStyleBordered的Button alt text http://img693.imageshack.us/img693/1632/bildschirmfoto20100227ui.png

有没有办法在这个位置设置一个普通风格的按钮？

Answer 1

请改为尝试：

- (id)init {
  if (self = [super init]) {
      self.title = @"please wait";

      UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 25, 25)];
      [button setImage:[UIImage imageNamed:@"star.png"] forState:UIControlStateNormal];
      [button addTarget:self action:@selector(buttonFavoriteClicked) forControlEvents:UIControlEventTouchUpInside];
      UIBarButtonItem *favorite = [[UIBarButtonItem alloc] initWithCustomView:button];
      [button release];

      self.navigationItem.rightBarButtonItem = favorite;
  }

  return self;
}

希望它有所帮助。

Answer 2

在界面构建器中创建一个UIButton，使其看起来完全符合您的要求。在.h中创建一个插座：

IBOutlet UIButton * _myButton;

然后使用自定义视图将其设置为右侧栏按钮项，这将消除边框：

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:_myButton];

这是有效的，因为UIButton是UIView的子类。

Answer 3

或者在没有IB的代码中执行此操作：

// add setting button to nav bar
UIImage* settingsGearImg = [UIImage imageNamed:@"settings_gear.png"];
CGRect frameimg = CGRectMake(0, 0, settingsGearImg.size.width, settingsGearImg.size.height);
UIButton *settingsButton = [[UIButton alloc] initWithFrame:frameimg];
[settingsButton setBackgroundImage:settingsGearImg forState:UIControlStateNormal];
[settingsButton addTarget:self action:@selector(settingsButtonAction) forControlEvents:UIControlEventTouchUpInside];
[settingsButton setShowsTouchWhenHighlighted:YES];
UIBarButtonItem *settingButtonItem =[[UIBarButtonItem alloc] initWithCustomView:settingsButton];
self.navigationItem.leftBarButtonItem = settingButtonItem;

结果：

使用此图标图像时（白色背景上为白色，因此在此处不可见 - 链接为：http://i.stack.imgur.com/lk5SB.png）：

Answer 4

这很奇怪，但它确实有效。对图像/插座说“不”！您甚至不应该设置UIBarButtonItemStylePlain属性。诀窍是将按钮放入UIToolBar中，并带有一些特殊属性：

UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"Cool plain bar"];
UIToolbar *tools = [[UIToolbar alloc]
                    initWithFrame:CGRectMake(0.0f, 0.0f, 44.0f, 44.01f)];
tools.clipsToBounds = NO;
tools.barStyle = -1; // clear background
NSMutableArray *buttons = [[NSMutableArray alloc] initWithCapacity:1];
UIBarButtonItem *bi = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(refreshTableView)];
[buttons addObject:bi];
[tools setItems:buttons animated:NO];
UIBarButtonItem *rightButtons = [[UIBarButtonItem alloc] initWithCustomView:tools];

item.rightBarButtonItem = rightButtons;
item.hidesBackButton = YES;
[myCoolNavigationBar pushNavigationItem:item animated:NO];

Answer 5

虽然Frank是对的，但这段代码应该在viewDidLoad中，这里的问题就是BarButtons的样子。如果您希望它看起来不同，则需要使用不同类型的UIView。您可以将UIButton添加到UIToolbar中。

-(void)viewDidLoad {
  [super viewDidLoad];
  self.title = @"please wait";
  self.navigationItem.rightBarButtonItem = [[[UIButton alloc] init] autorelease];
}

编辑：

抱歉，你想要一个简单的UIBarButtonItem。我不相信你可以用UINavigationBar做到这一点。你可以尝试添加一个UserInteractionEnabled UILabel作为rightBarButtonItem，我不确定它是否会起作用。

似乎目前无法做到这一点。
sbwoodside has a solution

Answer 6

为什么不试试UI7Kit？适合我，易于使用。

Answer 7

    UIImage *img = [UIImage imageNamed:@"white_star.png"];

      CGSize itemSize = CGSizeMake(20, 20);
      UIGraphicsBeginImageContext(itemSize);
      CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
      [img drawInRect:imageRect];
      img = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();


  UIBarButtonItem *barButton = [[UIBarButtonItem alloc ] initWithImage:img style:UIBarButtonSystemItemAdd target:self action:@selector(favoriteButtonClicked)];
  barButton.style = UIBarButtonItemStyleBordered;

Answer 8

试试这个，

UIBarButtonItem *barBtn = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"more.png"] style:UIBarButtonItemStylePlain target:self action:@selector(didPressButton)];