ios指定目录不进行icloud检测

时间真的是过得飞快，一周过去，现在来总结想想，好像都没有什么收获。这是一件让人非常恼怒的事情，明明每天都加班，明明连周六都在上班，钱没多拿，经验和知识却没有增加。上一周主要是在同事做过的模块里添加新功能，由于同事去做新的游戏，原先的应用完全由我来维护。同事的代码不错，采用MVC结构，结构剥离的相当明确，C层采用一个驱动，驱动里面嵌套了一个状态机。M数据采用装饰者模式嵌入C 层，利用事件响应机制来实现C层与V层的通讯。比较有价值的应该是他实现状态机的过程，可惜我要赶项目，而且当时编译原理也没学透彻，所以有点囫囵吞枣了。再者就是看同事定义的与后台的协议了，我们现在的做的是德州扑克的回放，状态比较多。着实是花了一些时间去看，代码是如何读取数据的。

当然这不是一篇抱怨的文章，虽然我老是抱怨这抱怨那的，其实我也挺讨厌那样的自己，只是控制不住罢了。比较有意义的一点可能是如何绕过ios的icloud审核。我们的应用是一个弱联网的，为了节省用户流量因此在app里面预存了一些数据。在程序第一次运行时，将数据从程序包拷贝到document目录。由于这个原因，app被app store拒绝过一次，提示程序未做任何操作，但是icloud多了一些数据。

绕过的方法如下:

- (BOOL)addSkipBackupAttributeToItemAtURLHigh:(NSURL *)URL
{
//    5.1 +
    assert([[NSFileManager defaultManager] fileExistsAtPath: [URL path]]);

    NSError *error = nil;
    BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES]
                                  forKey: NSURLIsExcludedFromBackupKey error: &error];
    if(!success){
        NSLog(@"Error excluding %@ from backup %@", [URL lastPathComponent], error);
    }
    return success;
}

- (BOOL)addSkipBackupAttributeToItemAtURLLow:(NSURL *)URL

{
//    5.0.1:
    assert([[NSFileManager defaultManager] fileExistsAtPath: [URL path]]);

    const char* filePath = [[URL path] fileSystemRepresentation];

    const char* attrName = "com.apple.MobileBackup";

    u_int8_t attrValue = 1;

    int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);

    return result == 0;

}

没有找到好的检测版本的方法，就用了最土的一种：

  <p class="p1"><span class="s1">    </span><span class="s2">NSURL</span><span class="s1"> *tempURL = [</span><span class="s2">NSURL</span><span class="s1"> </span>fileURLWithPath<span class="s1">:[</span><span class="s2">NSString</span><span class="s1"> </span>stringWithUTF8String<span class="s1">:(</span><span class="s3">CCFileUtils</span><span class="s1">::</span><span class="s4">sharedFileUtils</span><span class="s1">()-></span><span class="s4">getWritablePath</span><span class="s1">()+</span><span class="s5">"temp/"</span><span class="s1">).</span>c_str<span class="s1">()]];</span></p><p class="p2">   </p><p class="p3">    <span class="s2">NSString</span> *stringVersion =[[<span class="s2">UIDevice</span> <span class="s6">currentDevice</span>] <span class="s6">systemVersion</span>];</p><p class="p3">    <span class="s2">NSArray</span> * array = [stringVersion <span class="s6">componentsSeparatedByString</span>:<span class="s5">@"."</span>];</p><p class="p3">    <span class="s7">int</span> symbol = <span class="s8">0</span>;</p><p class="p3">    <span class="s7">for</span> (<span class="s2">NSInteger</span> i = <span class="s8">0</span>; i < array.<span class="s6">count</span>; ++ i) {</p><p class="p3">        <span class="s7">if</span> (i == <span class="s8">0</span>) {</p><p class="p3">            <span class="s7">if</span> ([[array <span class="s6">objectAtIndex</span>:i] <span class="s6">integerValue</span>] > <span class="s8">5</span>) {</p><p class="p3">                symbol = <span class="s8">3</span>;</p><p class="p3">                <span class="s7">break</span>;</p><p class="p3">            }<span class="s7">else</span> <span class="s7">if</span>([[array <span class="s6">objectAtIndex</span>:i] <span class="s6">integerValue</span>] < <span class="s8">5</span>){</p><p class="p3">                symbol = <span class="s8">0</span>;</p><p class="p3">                <span class="s7">break</span>;</p><p class="p3">            }</p><p class="p3">        }<span class="s7">else</span> <span class="s7">if</span>(i == <span class="s8">1</span>){</p><p class="p3">            <span class="s7">if</span> ([[array <span class="s6">objectAtIndex</span>:i] <span class="s6">integerValue</span>] >= <span class="s8">1</span>) {</p><p class="p3">                symbol = <span class="s8">3</span>;</p><p class="p3">                <span class="s7">break</span>;</p><p class="p3">            }</p><p class="p3">        }<span class="s7">else</span> <span class="s7">if</span>(i == <span class="s8">2</span>){</p><p class="p3">            <span class="s7">if</span> ([[array <span class="s6">objectAtIndex</span>:i] <span class="s6">integerValue</span>] > <span class="s8">0</span>) {</p><p class="p3">                symbol = <span class="s8">2</span>;</p><p class="p3">                <span class="s7">break</span>;</p><p class="p3">            }</p><p class="p3">        }</p><p class="p3">    }</p><p class="p3">    <span class="s7">if</span> (symbol == <span class="s8">2</span>) {</p><p class="p4"><span class="s1">        [</span><span class="s7">self</span><span class="s1"> </span>addSkipBackupAttributeToItemAtURLLow<span class="s1">:tempURL];</span></p><p class="p3">    }<span class="s7">else</span> <span class="s7">if</span>(symbol == <span class="s8">3</span>){</p><p class="p4"><span class="s1">        [</span><span class="s7">self</span><span class="s1"> </span>addSkipBackupAttributeToItemAtURLHigh<span class="s1">:tempURL];</span></p><p class="p3">    }</p>

值得注意的是：5.0一下的不存在icloud检测；不允许将document整个目录作为icloud忽略目录；检测V5.0.1时需要导入sys/xattr.h