iOS 判断设备是否越狱

根据是否能读取Cydia或apt或Applications来判断

+(BOOL)deviceIsJailBreak{
    BOOL isJailBreak = NO;
    NSString *cydiaPath = @"/Applications/Cydia.app";
    NSString *aptPath = @"/private/var/lib/apt/";
    if ([[NSFileManager defaultManager] fileExistsAtPath:cydiaPath]||[[NSFileManager defaultManager] fileExistsAtPath:aptPath]||[[NSFileManager defaultManager] fileExistsAtPath:@"User/Applications/"]) {
        isJailBreak = YES;
    }
    return isJailBreak;
}

也可以直接用友盟的 MobClick.h 里提供的方法，注释上看也是判断Cydia或apt：

/** 判断设备是否越狱，依据是否存在apt和Cydia.app
 */
+ (BOOL)isJailbroken;