iOS 常见问题解决办法

1.在项目中碰到一个问题:在UIWebView中,调用原生相机或图库,程序会重启到启动画面。查看打印信息,如下:

Warning: Attempt to present on whose view is not in the window hierarchy!

网上查了很多资料才知道,选择一个选项时,会把当前的ViewController dismiss掉,但是这里貌似是一个bug,dismiss了两次,结果第二次把tabbar(我的项目是tabbar-nav-viewController)给销毁了(断点到dealloc可以看到),然后就理所当然的崩溃了。

解决办法:
在自定义的tabbar中,重写dismiss方法,之所以第二次会dismiss tabbar,是因为第二次dismiss时,self.presentedViewController是一个nil。所以解决代码如下:

-(void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion
{
    if ( self.presentedViewController)
    {
        [super dismissViewControllerAnimated:flag completion:completion];
    }
}

参考:ios 10 在WebView中选择文件上传 出现 whose view is not in the window hierarchy!


2.Xcode 7以后没有dylib文件

解决办法:

  1. Go to Build Phases >Link Binary with Librairies > + > Add other
  1. Once in the file selection window do "CMD"+Shift+G (Go to folder) and type /usr/lib/
  2. From /usr/lib you can add : libz.dylib and more...
  3. Compile and have fun

参考:libz.dylib not found

3.Profile doesn't match the entitlements file's value for the application-identifier entitlement

解决办法:
target-capbilities-打开iCloud,然后关闭icloud,即可

Profile doesn't match the entitlements file's value for the application-identifier entitlement

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