自定义UINavigationBar backButton

Question

我一直在设置backgroundImages的{​​{1}}，但我从未想过如何设置UINavigationBars后退按钮的backgroundImage。

我怎么能这样做？

Answer 1

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 2

我认为你必须为backBarButtonItem创建一个自定义按钮，然后自定义它。

如果您正在寻找教程，请转到此问题 - How do you change color/image on the default backBarButtonItem?，我认为您可以在那里找到答案。

要使条形按钮项看起来像backBarButtonItem，请参阅此答案。 Creating a left-arrow button (like UINavigationBar's "back" style) on a UIToolbar

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];