ios - UINavigationController 隐藏导航栏时弹出
<p><p>我有两个 ViewControler (ControllerA, ControllerB),它们都在 viewWillAppear 中隐藏导航栏,在 viewWillDisappear 中显示导航栏(因为有时, Controller 将它们插入必须使栏显示)</p>
<p>现在,当我在导航堆栈中获得 ControllerA 时遇到问题,而在 ControllerA 中,我必须推送 ControllerB。 </p>
<p>因为推送动画会调用A的viewWillDisappear,所以在动画中。该栏将快速显示和隐藏,弹出动画中也出现了同样的问题。</p>
<p>当viewControllers有不同的显示/隐藏导航设置时,如何很好地进行这种push&pop?</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>好的,我有一个解决方案似乎效果很好,我在这里分享
1st创建一个uiviewcontroller目录</p>
<pre><code>#import <UIKit/UIKit.h>
#pragma mark Catalog Property Synthesize Support
#import <objc/runtime.h>
#define SYNTHESIZE_CATALOG_OBJ_PROPERTY(propertyGetter, propertySetter) \
- (id) propertyGetter { \
return objc_getAssociatedObject(self, @selector( propertyGetter )); \
} \
- (void) propertySetter (id)obj{ \
objc_setAssociatedObject(self, @selector( propertyGetter ), obj, OBJC_ASSOCIATION_RETAIN_NONATOMIC); \
}
#define SYNTHESIZE_CATALOG_VALUE_PROPERTY(valueType, propertyGetter, propertySetter) \
- (valueType) propertyGetter { \
valueType ret = {0}; \
; \
return ret; \
} \
- (void) propertySetter (valueType)value{ \
NSValue *valueObj = ; \
objc_setAssociatedObject(self, @selector( propertyGetter ), valueObj, OBJC_ASSOCIATION_RETAIN_NONATOMIC); \
}
@interface UIViewController (NavigationBar)
@property(nonatomic,assign) BOOL needBarHide;
- (BOOL)checkPreviousControllerHideFlagInViewWillDisappear;
@end
</code></pre>
<p>和实现</p>
<pre><code>#import "UIViewController+NavigationBar.h"
@implementation UIViewController (NavigationBar)
SYNTHESIZE_CATALOG_VALUE_PROPERTY(BOOL, needBarHide, setNeedBarHide:)
- (BOOL)checkPreviousControllerHideFlagInViewWillDisappear
{
BOOL lastVCFlag =.needBarHide;
return lastVCFlag;
}
@end
</code></pre>
<p>在每个想要隐藏bar的类实现中,这样做:(必须注意的是在你使用的init方法中设置了needBarHide标志)</p>
<pre><code>@implementation RedViewController
- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
self = ;
if (self)
{
self.needBarHide = YES;
}
return self;
}
- (instancetype) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = ;
if (self)
{
self.needBarHide = YES;
}
return self;
}
- (void)viewWillAppear:(BOOL)animated
{
;
;
self.delegateObject = self.navigationController.interactivePopGestureRecognizer.delegate;
self.navigationController.interactivePopGestureRecognizer.delegate = self;
}
- (void)viewWillDisappear:(BOOL)animated
{
;
BOOL hide = ;
;
NSLog(@"red viewWillDisappear hide:%d",hide);
self.navigationController.interactivePopGestureRecognizer.delegate = self.delegateObject;
}
@end
</code></pre></p>
<p style="font-size: 20px;">关于ios - UINavigationController 隐藏导航栏时弹出,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/43089400/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/43089400/
</a>
</p>
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