iOS 开发常见问题&知识汇总

Alan

4 年前

删除 Storyboard

首先删除项目下的Main.storyboard 文件，然后打开Info.plist, 删除SceneDelegate的StoryboardName

iOS 13之前，修改文件为AppDelegate.m：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    if (@available(iOS 13.0, *)){
        
    }else{
        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        ViewController *viewController = [[ViewController alloc] init];
        self.window.rootViewController = viewController;
        [self.window makeKeyAndVisible];
    }
    return YES;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

// Override point for customization after application launch.

if (@available(iOS 13.0, *)){

}else{

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

ViewController *viewController = [[ViewController alloc] init];

self.window.rootViewController = viewController;

[self.window makeKeyAndVisible];

}

return YES;

}

iOS 13之后修改的为SceneDelegate.m，以上文件不进行判断会报错Exception: “-[AppDelegate setWindow:]: unrecognized selector sent to instance

- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
        UIWindowScene *windowScene = (UIWindowScene *)scene;
    self.window = [[UIWindow alloc] initWithWindowScene:windowScene];
    ViewController *viewController = [[ViewController alloc] init];
    self.window.rootViewController = viewController;
    [self.window makeKeyAndVisible];
}

- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {

UIWindowScene *windowScene = (UIWindowScene *)scene;

self.window = [[UIWindow alloc] initWithWindowScene:windowScene];

ViewController *viewController = [[ViewController alloc] init];

self.window.rootViewController = viewController;

[self.window makeKeyAndVisible];

}

以上都通过ViewController.m来对背景色等进行初始化，因此需进行导入

 #import "ViewController.h"

1	#import "ViewController.h"

CocoaPods

# 安装https://www.jianshu.com/p/45f2ec14644b
pod init # 在项目目录下进行 CocoaPods 初始化

pod repo # 查看镜像源
# 修改镜像源
cd ~/.cocoapods/repos 
pod repo remove master
git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git master
在项目工程 podfile 的第一行添加source 'https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git'
rm ~/Library/Caches/CocoaPods/search_index.json
pod repo remove trunk
# 搜索三方库
pod search 'AFNetworking'

# 安装https://www.jianshu.com/p/45f2ec14644b

pod init # 在项目目录下进行 CocoaPods 初始化

pod repo # 查看镜像源

# 修改镜像源

cd ~/.cocoapods/repos

pod repo remove master

git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git master

在项目工程 podfile 的第一行添加source 'https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git'

rm ~/Library/Caches/CocoaPods/search_index.json

pod repo remove trunk

# 搜索三方库

pod search 'AFNetworking'

常见问题

1、NSLog 不输出

Product -> Scheme -> Edit Scheme -> Run -> Arguments -> Environment Variables，取消对OS_ACTIVITY_MODE值为disable的勾选

2、Showing All Issues Undefined symbol: _kJPFNetworkDidReceiveMessageNotification

Build Settings中的 Build Active Architecture Only设置由NO改为YES

3、iframe 内获取WebView Cookie 问题

# android
if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
    CookieManager.getInstance().setAcceptThirdPartyCookies(mWebView,true);
}

# android

if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){

CookieManager.getInstance().setAcceptThirdPartyCookies(mWebView,true);

}