自定義UINavigationBar backButton

Question

我總是設置backgroundImages的UINavigationBars，但我從來沒有計算出如何設置UINavigationBar的後退按鈕的backgroundImage。

我該怎麼做？

Answer 1

我想你將不得不爲backBarButtonItem創建一個自定義按鈕，然後對其進行自定義。

如果你正在尋找教程，然後去這個問題 - How do you change color/image on the default backBarButtonItem?，我想你在那裏找到你的答案。

要使條形按鈕項目看起來像backBarButtonItem，請參閱此答案。 Creating a left-arrow button (like UINavigationBar's "back" style) on a UIToolbar

Answer 2

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; 
button.frame = CGRectMake(0,0,36,30); 
[button setBackgroundImage:[UIImage imageNamed:@"backgroundImage.png"] forState:UIControlStateNormal]; 

//[button setTitle:@" Back" forState:UIControlStateNormal]; 
//[button.titleLabel setFont:[UIFont boldSystemFontOfSize:11]]; 

[button addTarget:self.navigationController action:@selector(popViewControllerAnimated:) forControlEvents:UIControlEventTouchUpInside]; 
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button]; 
[self.navigationItem setLeftBarButtonItem:barButtonItem]; 

Answer 3

UIButton *backbutton = [UIButton buttonWithType:UIButtonTypeCustom]; 
backbutton.frame = CGRectMake(0,0,36,30); 
[backbutton setBackgroundImage:[UIImage imageNamed:@"backgroundImage.png"] forState:UIControlStateNormal]; 

[backbutton addTarget:self.navigationController action:@selector(popViewControllerAnimated:) forControlEvents:UIControlEventTouchUpInside]; 
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backbutton]; 
[self.navigationItem setLeftBarButtonItem:barButtonItem];