iPhone：添加信息按鈕作爲代碼中的導航欄中的右欄按鈕項目

Question

有沒有人有成功地在代碼中創建信息按鈕（斜體'我'在一個圓圈中）（讀取：沒有界面生成器），然後分配它作爲導航欄的右側欄按鈕項？

我看遍了，我甚至找不到如何在代碼中創建信息按鈕。任何幫助將不勝感激。

Answer 1

UIButton *btn = [UIButton buttonWithType:UIButtonTypeInfoDark]; 
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btn]; 

Answer 2

這是一個非常好看的解決方案，我認爲它涵蓋了人們在上述評論中提到的所有要點。與接受的答案類似，但此方法包括額外的間距（通過修改框架），以便按鈕不會撞到右邊緣。

// Create the info button 
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight]; 

// Adjust the frame by adding an addition 10 points to its width so the button is padded nicely 
infoButton.frame = CGRectMake(infoButton.frame.origin.x, infoButton.frame.origin.y, infoButton.frame.size.width + 10.0, infoButton.frame.size.height); 

// Hook the button up to an action 
[infoButton addTarget:self action:@selector(showInfoScreen) forControlEvents:UIControlEventTouchUpInside]; 

// Add the button to the nav bar 
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:infoButton]; 

// Also make sure to add a showInfoScreen method to your class! 

Answer 3

我想這將是更完整的響應，它應該在任何情況下幫助：

-(void)viewDidLoad{ 

    //Set Navigation Bar 
    UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 64)]; 

    //Set title if needed 
    UINavigationItem * navTitle = [[UINavigationItem alloc] init]; 
    navTitle.title = @"Title"; 

    //Here you create info button and customize it 
    UIButton * tempButton = [UIButton buttonWithType:UIButtonTypeInfoLight]; 

    //Add selector to info button 
    [tempButton addTarget:self action:@selector(infoButtonClicked) forControlEvents:UIControlEventTouchUpInside]; 

    UIBarButtonItem * infoButton = [[UIBarButtonItem alloc] initWithCustomView:tempButton]; 

    //In this case your button will be on the right side 
    navTitle.rightBarButtonItem = infoButton; 

    //Add NavigationBar on main view 
    navBar.items = @[navTitle]; 
    [self.view addSubview:navBar]; 

} 

Answer 4

對於斯威夫特：

func addRightNavigationBarInfoButton() { 
    let button = UIButton(type: .infoDark) 
    button.addTarget(self, action: #selector(self.showInfoScreen), for: .touchUpInside) 
    self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button) 
} 

@objc func showInfoScreen() { 
    // info bar button pressed 
}