** 判断iPhone是否越狱 **

• ** 注意以下代码不要单独写在一个方法里将是否越狱的状态返回（越狱之后可以修改方法的返回值） **

//是否越狱
BOOL jailBroken = false;
    
    if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"cydia:"]]) {
        jailBroken = YES;
    }
    
#define ARRAY_SIZE(a) sizeof(a)/sizeof(a[0])
    
    const char* jailbreak_tool_pathes[] = {
        "/Applications/Cydia.app",
        "/Library/MobileSubstrate/MobileSubstrate.dylib",
        "/bin/bash",
        "/usr/sbin/sshd",
        "/etc/apt"
    };
    
    for (int i=0; i<ARRAY_SIZE(jailbreak_tool_pathes); i++) {
        if ([[NSFileManager defaultManager] fileExistsAtPath:[NSString stringWithUTF8String:jailbreak_tool_pathes[i]]]) {
            NSLog(@"The device is jail broken!");
            jailBroken = YES;
        }
    }
    
#define USER_APP_PATH     @"/User/Applications/"

    if ([[NSFileManager defaultManager] fileExistsAtPath:USER_APP_PATH]) {
        NSLog(@"The device is jail broken!");
        NSArray *applist = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:USER_APP_PATH error:nil];
        NSLog(@"applist = %@", applist);
        jailBroken = YES;
    }
    
    NSLog(@"------%d-",jailBroken);

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以上进行了3次越狱检测

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方法名不要太直接 太明显