答案 0 :(得分：4)
使用此代码：
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0,0,36,30);
[button setBackgroundImage:[UIImage imageNamed:@"backgroundImage.png"] forState:UIControlStateNormal];
[button addTarget:self.navigationController action:@selector(popViewControllerAnimated:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
[self.navigationItem setLeftBarButtonItem:barButtonItem];
或使用此库。非常容易和美观的结果。
https://github.com/boctor/idev-recipes/tree/master/CustomBackButton
答案 1 :(得分：0)
答案 2 :(得分：-2)