Objective c iOS 7视图未调整大小或隐藏

我有一个问题，几个星期来我一直在想这个问题。请帮忙。我有一个iOS 7应用程序，它具有导航栏视图、嵌入文本字段的视图（addressBarView）和web视图。我正在实现WebScriptObject（我不关心iTunes存储的可通过性），这样网页JavaScript就可以启动Objective C方法。这非常有效，直到我启动了一个应该隐藏导航栏和地址栏的方法

这里是风景

…这是子视图的结构和弹簧

加载网页时，会检查

META

标记。如果他们说

或

，那么下面的

showHideNavBar

或

showHideNavBar

方法将被触发。这些很好用

现在，这里有什么是不需要的

我不会对WebScript对象的细节感到厌烦，但这里是相关的代码段

#pragma mark - webScript Bridge

+ (NSString *)webScriptNameForSelector:(SEL)sel {
    // Naming rules can be found at:http://goo.gl/GAkziE
    if (sel == @selector(showHideAddressBar::)) {return @"showHideAddressBar";} else
    if (sel == @selector(showHideNavBar::)) {return @"showHideNavBar";}
}

因为所有的UI更改都必须在主线程上完成，所以我这样做

- (void)showHideNavBar:(BOOL)hide :(BOOL)animate {
    NSDictionary *navBarOptions = @{@"hide": [NSString stringWithFormat:@"%hhd", hide],
                                    @"animate": [NSString stringWithFormat:@"%hhd", animate]};
    [self performSelectorOnMainThread:@selector(navBarState:) withObject:navBarOptions waitUntilDone:NO];
}

然后是真正时髦的东西

- (void)navBarState:(NSDictionary *)navBarOptions {
    float addressBarY = navBarHidden ? 20.0f : 0.0f;
    BOOL animate = [navBarOptions[@"animate"] boolValue];
    BOOL hide = [navBarOptions[@"hide"] boolValue];
    float webViewY = addressBarY + (addressBarHidden ? 0.0f : 40.0f);
    float webViewHeight = [self view].frame.size.height - webViewY;

    self.navigationController.navigationBar.translucent = NO;
    if (hide && !navBarHidden) {
        navBarHidden = YES;
        [self.navigationController setNavigationBarHidden:YES animated:animate];
    }
    else if (!hide && navBarHidden) {
        navBarHidden = NO;
        [self.navigationController setNavigationBarHidden:NO animated:animate];
    }

    CGRect rectAddrBar = self.addressBarView.frame;
    rectAddrBar.origin.y = addressBarY;
    self.addressBarView.frame = rectAddrBar;

    CGRect rectWebView = self.webView.frame;
    rectWebView.origin.y = webViewY;
    rectWebView.size.height = webViewHeight;
    self.webView.frame = rectWebView;

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.view layoutSubviews];
    });
}

这是正常状态

当导航栏和地址栏隐藏在网页加载上时，使用META-tag指令隐藏这些栏

现在，当栏被隐藏，我离开页面并返回时，我得到了这个

我把这个屏幕截图拉下来，你可以看到地址栏隐藏在导航栏后面

当我在视图更新点设置断点时，我看到正在使用主线程

---

我已经尝试了很多模式来让它起作用。我尝试过不使用dispatch_async（崩溃应用程序）、使用LayoutFneed、LayoutSubview等。有人有解决方案吗？

你知道，一个角色可以决定你的心智是否健全。启动显示/隐藏操作的方法是类方法，

webScriptNameForSelector

。我必须为需要操作的UI元素创建实例变量

- (void)navBarState:(NSDictionary *)navBarOptions {
    float addressBarY = navBarHidden ? 20.0f : 0.0f;
    BOOL animate = [navBarOptions[@"animate"] boolValue];
    BOOL hide = [navBarOptions[@"hide"] boolValue];
    float webViewY = addressBarY + (addressBarHidden ? 0.0f : 40.0f);
    float webViewHeight = [self view].frame.size.height - webViewY;

    self.navigationController.navigationBar.translucent = NO;
    if (hide && !navBarHidden) {
        navBarHidden = YES;
        [self.navigationController setNavigationBarHidden:YES animated:animate];
    }
    else if (!hide && navBarHidden) {
        navBarHidden = NO;
        [self.navigationController setNavigationBarHidden:NO animated:animate];
    }

    CGRect rectAddrBar = self.addressBarView.frame;
    rectAddrBar.origin.y = addressBarY;
    self.addressBarView.frame = rectAddrBar;

    CGRect rectWebView = self.webView.frame;
    rectWebView.origin.y = webViewY;
    rectWebView.size.height = webViewHeight;
    self.webView.frame = rectWebView;

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.view layoutSubviews];
    });
}

- (void)addressBarState:(NSDictionary *)adrBarOptions {
    float addressBarY = navBarHidden ? 20.0f : 0.0f;
//    BOOL animate = [adrBarOptions[@"animate"] boolValue];
    BOOL hide = [adrBarOptions[@"hide"] boolValue];
    float webViewY = addressBarY + (addressBarHidden ? 0.0f : 40.0f);
    float webViewHeight = [self view].frame.size.height - webViewY;

    if (hide && addressBarHidden == NO) {
        addressBarHidden = YES;
        self.addressBarView.hidden = YES;
        self.urlTextField.hidden = YES;
        webViewY = addressBarY;
        webViewHeight = [self view].frame.size.height - webViewY;
    } else if (!hide && addressBarHidden == YES) {
        addressBarHidden = NO;
        self.addressBarView.hidden = NO;
        self.urlTextField.hidden = NO;
        webViewY = self.addressBarView.frame.size.height;
        webViewHeight = [self view].frame.size.height - webViewY;
    }
    CGRect rectAddrBar = self.addressBarView.frame;
    rectAddrBar.origin.y = addressBarY;
    self.addressBarView.frame = rectAddrBar;

    CGRect rectWebView = self.webView.frame;
    rectWebView.origin.y = webViewY;
    rectWebView.size.height = webViewHeight;
    self.webView.frame = rectWebView;

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.view layoutSubviews];
    });
}