警告：Warning: Attempt to present <UIAlertController: 0x102095720> on <ljNavigationController: 0x10283bc00> whose view is not in the window hierarchy!
解决方法：
- (UIViewController*)topViewController {
return [self topViewControllerWithRootViewController:self.window.rootViewController];
}
- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {
if ([rootViewController isKindOfClass:[UITabBarController class]]) {
UITabBarController *tabBarController = (UITabBarController *)rootViewController;
return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
} else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController* navigationController = (UINavigationController*)rootViewController;
return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
} else if (rootViewController.presentedViewController) {
UIViewController* presentedViewController = rootViewController.presentedViewController;
return [self topViewControllerWithRootViewController:presentedViewController];
} else {
return rootViewController;
}
}
警告：[Common] _BSMachError: port 8207; (os/kern) invalid capability (20) "Unable to insert COPY_SEND" [Common] _BSMachError: port 8207; (os/kern) invalid name (15) "Unable to deallocate send right"
原因：是自己在alertAction中添加了时间，但是并未采用延时机制。
解决方法：[alertVC addAction:[UIAlertAction actionWithTitle:@"现在升级" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//这里添加了多线程，消除警告
dispatch_after(0.2, dispatch_get_main_queue(), ^{
NSURL *appStoreUrl = [NSURL URLWithString:[NSString stringWithFormat:kAppStore_APPVersionUrl,APP_ID]];
[[UIApplication sharedApplication] openURL:appStoreUrl];
NSLog(@"链接--%@",appStoreUrl);
});
}]];
Xcode 真机调试报错：This application's application-identifier entitlement does not match that of the installed application. These values must match for an upgrade to be allowed
解决方法：
iPhone上已经装了包标识符一样的 App，删掉再运行
1、Xcode－Window->Devices
2、选中你的设备，在右边的installed Apps中删除这个App
3、重新编绎即可
报错：ld: '/Users/yun/Library/Developer/Xcode/DerivedData/ZSXQ-bqqqiowivvvifvcutgqglfrkrhvc/Build/Products/Debug-iphoneos/AFNetworking/libAFNetworking.a(AFAutoPurgingImageCache.o)' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. file '/Users/yun/Library/Developer/Xcode/DerivedData/ZSXQ-bqqqiowivvvifvcutgqglfrkrhvc/Build/Products/Debug-iphoneos/AFNetworking/libAFNetworking.a' for architecture arm64
错误解析：你添加的SDK（例如：友盟、环信）的二进制库不支持bitcode，但是Xcode默认是支持bitcode的,而且如果支持的话,其中所有的二进制库和framework都必须包含bitcode。
解决方法：
警告：/xxx/Assets.xcassets: A 76x76@2x app icon is required for iPad apps targeting iOS 7.0 and later
解决方法： 如果App支持iPad的话，就需要添加上对应的尺寸；如果只支持iPhone的话：Xcode－Targets－General － Deployment info － Devices
提示：做混合开发时JS那边返回过来的接口最好中文转义处理一下，否则接口如果带中文的话会报错：Error code 101
报错：dyld: Library not loaded: /System/Library/Frameworks/UserNotifications.framework/UserNotifications Referenced from: /var/containers/Bundle/Application/6112ED05-088A-4790-A80A-F05DA0C86C31/ZSXQ.app/ZSXQ Reason: image not found
解决方案：方案一：1、在Xcode中的Build Phases中的Copy Files项中，将你要引用的framework拖到“Linked Frameworks and Libraries“中【如果已经添加了，跳过这一步】；2、把Build Phases 里Social.framework后边的选项修改成为Optional就可以了
方案二：在Embedded Binaries点击“+”号，把动态库添加进来
控制台报错：Unbalanced calls to begin/end appearance transitions for <XXX: 0x7fd76290ed70>
原因：控制器之间的跳转动画引起的视图控制器转换显示不协调，没有正确的 开始和结束转换显示
警告：Block implicitly retains 'self'; explicitly mention 'self' to indicate this is intended behavior Insert 'self->'
解决方法：Building Settings ->搜索implicit retain of 'self’，将对应的值改为NO
检查项目中是否存在IDFA的方法：
1. 打开终端cd到要检查的文件的根目录。
2. 执行下列语句：grep -r advertisingIdentifier .（别少了最后那个点号）
手机连接Xcode显示在充电状态但不显示设备时，需要关闭Xcode，再在终端输入命令行：
```sudo pkill usbmuxd```
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