1
ΩI've一直在努力現在就像一個小時做到這一點，似乎沒有任何工作：的UINavigationController - 按鈕改回圖像
事情我已經嘗試：
1）不工作。
UIImage *image = [UIImage imageNamed:@"scr1_button_topbar.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setBackgroundImage: [image stretchableImageWithLeftCapWidth:7.0 topCapHeight:0.0] forState:UIControlStateNormal];
button.frame= CGRectMake(0.0, 0.0, image.size.width, image.size.height);
[button addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
UIView *v=[[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, image.size.width, image.size.height) ];
[v addSubview:button];
UIBarButtonItem *forward = [[UIBarButtonItem alloc] initWithCustomView:v];
self.navigationItem.backBarButtonItem= forward;
2）工程，但看起來非常愚蠢，它留下了「後退」文本。
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[UIImage imageNamed:@"scr2_btnback"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
3）按鈕不會顯示
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[UIImage imageNamed:@"scr2_btnback"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
和設置設置左邊欄按鈕項目文本@ 「」
4） - 作品，但是這是一個有點作弊，我想要後退按鈕，而不是左側按鈕。
UIImage *backImage = [UIImage imageNamed:@"scr2_btnback.png"];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(0, 0, backImage.size.width, backImage.size.height);
[backButton setImage:backImage forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(backButton:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton] ;
self.navigationItem.hidesBackButton = YES;
self.navigationItem.leftBarButtonItem = backBarButtonItem;