iOS7之后蘋果導(dǎo)航控制器增加了一個左側(cè)邊緣右滑pop的手勢，在非棧底的控制器里面，從左邊右滑之后相當于出棧（pop）樣子。
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以下設(shè)置均在自定義的UINavigationController里操作
// 默認是YES 設(shè)置為NO左側(cè)右滑手勢就不可用了 self.interactivePopGestureRecognizer.enabled = YES;
也可以通過手勢實現(xiàn)右滑
遵守UIGestureRecognizerDelegate協(xié)議，設(shè)置代理對象，實現(xiàn)一下代理方法即可：
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-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.navigationController.interactivePopGestureRecognizer.delegate = self;
}
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
if (self.viewControllers.count <= 1) {
return NO;
}
return YES;
}
個人的記憶方法：
backBarButtonItem設(shè)置下一個頁面的返回按鈕
leftBarButtonItem設(shè)置當前頁面的返回按鈕
項目中我們多數(shù)會自定義左側(cè)返回按鈕leftBarButtonItem，這個時候就算設(shè)置self.interactivePopGestureRecognizer.enabled = YES了或者實現(xiàn)手勢的代理，左邊緣的右滑動手勢依舊會失效，例如如下代碼寫過之后，可以驗證一下，失效了。
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (self.viewControllers.count > 0) {
/* 不是棧底控制器的時候隱藏tabbar */
viewController.hidesBottomBarWhenPushed = YES;
// 設(shè)置左邊的返回按鈕leftBarButtonItem
UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
backBtn.frame = CGRectMake(0, 0, 44, 44);
backBtn.imageView.contentMode = UIViewContentModeCenter;
backBtn.contentEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 34);
[backBtn setImage:[UIImage imageNamed:@"rrrr"] forState:UIControlStateNormal];
[backBtn setImage:[UIImage imageNamed:@"rrrr"] forState:UIControlStateHighlighted];
[backBtn addTarget: self action: @selector(back) forControlEvents: UIControlEventTouchUpInside];
UIBarButtonItem *backBtnItem=[[UIBarButtonItem alloc]initWithCustomView:backBtn];
viewController.navigationItem.leftBarButtonItem = backBtnItem;
// 此處改為設(shè)置backBarButtonItem 右滑手勢可以用，但自定義按鈕不展示?。? }
[super pushViewController:viewController animated:animated];
}
按照如下方式設(shè)置backBarButtonItem或leftBarButtonItem，其他不做任何設(shè)置，右滑效果可用：
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (self.viewControllers.count > 0) {
/* 不是棧底控制器的時候隱藏tabbar */
viewController.hidesBottomBarWhenPushed = YES;
}
[self.navigationBar setBackIndicatorImage:[UIImage imageNamed:@"rrrr"]];
[self.navigationBar setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"rrrr"]];
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem = backItem;
[super pushViewController:viewController animated:animated];
}
或者
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (self.viewControllers.count > 0) {
/* 不是棧底控制器的時候隱藏tabbar */
viewController.hidesBottomBarWhenPushed = YES;
[self.navigationBar setBackIndicatorImage:[UIImage imageNamed:@"rrrr"]];
[self.navigationBar setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"rrrr"]];
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.leftBarButtonItem = backItem;
}
[super pushViewController:viewController animated:animated];
}
進過上面的反復(fù)測試：在自定義導(dǎo)航欄控制器中backBarButtonItem不能用View視圖方法自定義，而leftBarButtonItem可以。
setBackIndicatorImage和setBackIndicatorTransitionMaskImage無論怎么設(shè)置都是只能看到setBackIndicatorImage的圖片，找不到原因?。?！
然后嘗試直接在root視圖控制器里面設(shè)置返回按鈕backBarButtonItem的自定義view,右滑手勢可用，但是設(shè)置leftBarButtonItem就不能使用右滑手勢：
- (void)viewDidLoad {
[super viewDidLoad];
// 設(shè)置左邊的返回按鈕
UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
backBtn.frame = CGRectMake(0, 0, 44, 44);
backBtn.imageView.contentMode = UIViewContentModeCenter;
backBtn.contentEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 34);
[backBtn setImage:[UIImage imageNamed:@"rrrr"] forState:UIControlStateNormal];
[backBtn setImage:[UIImage imageNamed:@"rrrr"] forState:UIControlStateHighlighted];
[backBtn addTarget: self action: @selector(back) forControlEvents: UIControlEventTouchUpInside];
backBtn.backgroundColor = [UIColor redColor];
[self.navigationController.navigationBar setBackIndicatorImage:[UIImage imageNamed:@"rrrr"]];
[self.navigationController.navigationBar setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"rrrr"]];
UIBarButtonItem *backBtnItem=[[UIBarButtonItem alloc]initWithCustomView:backBtn];
backBtnItem.title = @"";
self.navigationItem.backBarButtonItem = backBtnItem;
}
以上是自己的驗證，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持創(chuàng)新互聯(lián)。
