如何將兩個按鈕添加到UINavigation欄標題視圖

Question

任何人都可以幫助我如何使用標題視圖屬性將兩個按鈕添加到導航標題視圖。我試過，但能夠使用下面的代碼只能添加一個按鈕。

UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]; 
customView.backgroundColor = [UIColor redColor]; 

UIButton *b1 = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 50, 50)]; 
UIButton *b2 = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 50, 50)]; 

[b1 setTitle:@"Hai" forState:UIControlStateNormal]; 
[b2 setTitle:@"Hello" forState:UIControlStateNormal]; 

[customView insertSubview:b1 atIndex:0]; 
[customView insertSubview:b2 atIndex:1]; 

self.navigationItem.titleView = customView; 

Answer 1

使用此代碼：

UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 44)]; 
customView.backgroundColor = [UIColor redColor]; 

UIButton *b1 = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 50, 50)]; 
UIButton *b2 = [[UIButton alloc] initWithFrame:CGRectMake(50, 0, 50, 50)]; 

[b1 setTitle:@"Hai" forState:UIControlStateNormal]; 
[b2 setTitle:@"Hello" forState:UIControlStateNormal]; 

[customView insertSubview:b1 atIndex:0]; 
[customView insertSubview:b2 atIndex:1]; 

self.navigationItem.titleView = customView; 

輸出：

Answer 2

這是因爲您已經爲兩個按鈕添加了相同的框架。所以，按鈕實際上是重疊的。您應該使用此代碼：

UIButton *b1=[[UIButton alloc]initWithFrame:CGRectMake(0, 0, 50, 50)]; 
UIButton *b2=[[UIButton alloc]initWithFrame:CGRectMake(60, 0, 50, 50)]; 

然後，您可以簡單地將這些按鈕添加到您的自定義視圖。

[cusotmView addSubView:b1]; 
[cusotmView addSubView:b2]; 

---

錯誤原因：

你不能直接添加UIButtons。你需要先把它們包裝成UIBarButtonItems。

示例代碼：

UIBarButtonItem *btn1 = [[UIBarButtonItem alloc] initWithCustomView:b1]; 
UIBarButtonItem *btn2 = [[UIBarButtonItem alloc] initWithCustomView:b2]; 
[cusotmView addSubView:btn1]; 
[cusotmView addSubView:btn2];