在android或ios检查应用是否安装

android

包名: com.cabbagelol.bfban

https://developer.android.com/training/package-visibility

Java

isPackageInstalled.java

private boolean isPackageInstalled(String packageName, PackageManager packageManager) {
    try {
        packageManager.getPackageInfo(packageName, 0);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
        return false;
    }
}

kotlin

isPackageInstalled.kt

private fun isPackageInstalled(packageName: String, packageManager: PackageManager): Boolean =
    try {
        packageManager.getPackageInfo(packageName, 0)
        true
    } catch (e: PackageManager.NameNotFoundException) {
        false
    }

ios

bundle ID: com.cabbagelol.bfban

isPackageInstalled.swift

Class LSApplicationWorkspace_class = objc_getClass("LSApplicationWorkspace");
NSObject* workspace = [LSApplicationWorkspace_class performSelector:@selector(defaultWorkspace)];
NSArray *allApplications = [workspace performSelector:@selector(allApplications)];
NSInteger appConnt = 0;

for (NSString *appStr in allApplications) {
  NSString *app = [NSString stringWithFormat:@"%@",appStr];
    NSRange range = [app rangeOfString:@"BFBAN bundle ID"];
     if (range.length > 1) {
        appConnt ++;
     }
}
if (appConnt >= 1) {
    // 已安装
}