iOS：自定義圖像UIBarButtonItem不響應觸摸

Question

我正在嘗試將圖像用作導航欄中的按鈕。 按鈕顯示正常，但它們不響應觸摸事件。 這是我設置按鈕的方式：

UIImageView *iv = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"arrow_up_24.png"]];

iv.userInteractionEnabled=YES;
UIBarButtonItem * logoutButton = [[UIBarButtonItem alloc] initWithCustomView:iv ];

logoutButton.target=self;
logoutButton.action=@selector(logoutButtonPressed);

我錯過了什么？

Answer 1

如果我沒記錯的話，我在過去的一個項目中遇到了這個問題。 我相信這是UIBarButtonItem一個問題。 解決方法是......

UIButton *imageButton = [UIButton buttonWithStyle:UIButtonStyleCustom];
imageButton.frame = CGRectMake(0,0,24,24);//Standard size of a UIBarButtonItem i think.
[imageButton setImage:[UIImage imageNamed:@"arrow_up_24.png"] forState:UIControlStateNormal];
[imageButton addTarget:self action:@selector(logoutButtonPressed) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *barItem = [[UIBarButtonItem alloc] initWithCustomView:imageButton];

//將它添加到您的欄或此處的任何內容。

如果你想像常規按鈕一樣白色發光，你必須設置

imageButton.showsTouchWhenHighlighted = YES;

Answer 2

試試這個，我認為問題是你正在設置圖像對象而不是按鈕對象。

UIButton *navBarButton = [[UIButton alloc] init];
[navBarButton setImage:[UIImage imageNamed:@"arrow_up_24.png"] forState:UIControlStateNormal];
[navBarButton addTarget:self action:@selector(logoutButtonPressed) forControlEvents:UIControlEventTouchUpInside];

// Use self.navigationItem.leftBarButtonItem if that's your preference
UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithCustomView:rightItemImage];
self.navigationItem.rightBarButtonItem = rightItem;