转载1

1获取系统语言设置

     NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];

     NSArray *languages = [userDefault objectForKey:@"AppleLanguages"];

     NSString *preferredLang = [languages objectAtIndex:0];

2缓存路径下文件大小

- (unsigned long long int) cacheFolderSize 

{

    NSFileManager  *_manager = [NSFileManager defaultManager];

    NSArray *_cachePaths =  NSSearchPathForDirectoriesInDomains(NSCachesDirectory,
                                                NSUserDomainMask, YES);

    NSString  *_cacheDirectory = [_cachePaths objectAtIndex:]; 

    NSArray  *_cacheFileList;

    NSEnumerator *_cacheEnumerator;

    NSString *_cacheFilePath;

    unsigned long long int _cacheFolderSize = ;

    _cacheFileList = [ _manager subpathsAtPath:_cacheDirectory];

   _cacheEnumerator = [_cacheFileList objectEnumerator];

    while (_cacheFilePath = [_cacheEnumerator nextObject]) 

   {

         NSDictionary *_cacheFileAttributes = [_managerfileAttributesAtPath:  

         [_cacheDirectory   stringByAppendingPathComponent:_cacheFilePath]

         traverseLink:YES];

      _cacheFolderSize += [_cacheFileAttributes fileSize];

    }

// 单位是字节

    return _cacheFolderSize;

}

3Popover push 时 Frame无法改变解决办法在popover中的ViewController中实现：

- (void)viewWillAppear:(BOOL)animated 
{

   CGSize size = CGSizeMake(320, 480); // size of view in popover  

   self.contentSizeForViewInPopover = size; 

   [super viewWillAppear:animated]; 

}4tableview滑动导致NSTimer和委托回调停止解决办法

/ /请求回调

NSURLRequest  * 请求  =  ...

scheduleInRunLoop ：[ NSRunLoop  currentRunLoop ] 
                                            forMode ：NSRunLoopCommonModes ] 
[ 连接开始] / /定时器回调

NSTimer * updateTimer = [NSTimer scheduledTimerWithTimeInterval：0.01f目标：自我选择：选择（updatePencent）的UserInfo：无重复：是];

* NSRunLoop主要= [NSRunLoop currentRunLoop] 
[主要addTimer：updateTimer forMode：NSRunLoopCommonModes];

5手势识别类

UIGestureRecognizer

6SFHFKeychainUtils 存储信息

苹果SDK自带的就有密码保护，使用方法很简单，如下：

1、引入Security.frameWork框架。

2、引入头文件：SFHKeychainUtils.h.

3、存密码：

[SFHFKeychainUtils storeUsername:@"dd" andPassword:@"aa"forServiceName:SERVICE_NAMEupdateExisting:1 error:nil];

[SFHFKeychainUtils deleteItemForUsername:@"dd" andServiceName:SERVICE_NAME error:nil];

4、取密码：

NSString *passWord =  [SFHFKeychainUtils getPasswordForUsername:@"dd"andServiceName:SERVICE_NAMEerror:nil];

7missing required architecture i386 in file 解决办法

在TargetInfo里面修改 Framework Search Pasths 删除里面内容就可以了。

8view 放大缩小动画效果

//创建缩小了的视图
myWeiBoImageVC = [[UIViewController alloc] init];
myWeiBoImageVC.view.clipsToBounds = YES;
myWeiBoImageVC.view.alpha = 0.0;
myWeiBoImageVC.view.frame = CGRectMake(64, 0, 1024-64, 768-20);
[self.view addSubview:myWeiBoImageVC.view];
    
CGAffineTransform newTransform = 
CGAffineTransformScale(myWeiBoImageVC.view.transform, 0.1, 0.1);
[myWeiBoImageVC.view setTransform:newTransform];
myWeiBoImageVC.view.center = CGPointMake(670, 100);
 
[self performSelector:@selector(imageViewControllerBigAnimation)];

//放大刚刚创建缩小后的视图
- (void)imageViewControllerBigAnimation{
   
    [UIView beginAnimations:@"imageViewBig" context:nil];
    [UIView setAnimationDuration:0.5];   
    CGAffineTransform newTransform =            CGAffineTransformConcat(myWeiBoImageVC.view.transform,  CGAffineTransformInvert(myWeiBoImageVC.view.transform));
    [myWeiBoImageVC.view setTransform:newTransform];
    myWeiBoImageVC.view.alpha = 1.0;
    myWeiBoImageVC.view.center = CGPointMake(416, 510)；
    [UIView commitAnimations];
   
}

//缩小视图 隐藏

- (void)imageViewControllerSmallAnimation{

    [UIView beginAnimations:@"imageViewSmall" context:nil];
    [UIView setAnimationDuration:0.5];
    CGAffineTransform newTransform =  CGAffineTransformScale(myWeiBoImageVC.view.transform, 0.1, 0.1);
    [myWeiBoImageVC.view setTransform:newTransform];
    myWeiBoImageVC.view.center = CGPointMake(670, 100);
    [UIView commitAnimations];
   
}

9UIScrollView 控制View缩放

allImageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 768, 1024)];
allImageScrollView.minimumZoomScale = 0.3;
allImageScrollView.maximumZoomScale = 1.0;
allImageScrollView.backgroundColor = [UIColor clearColor];
allImageScrollView.delegate = self;
[self.view addSubview:allImageScrollView];

mPicStatusesViewController = [[PicStatusesViewController alloc] init];
[allImageScrollView addSubview:mPicStatusesViewController.view];

//UIScrollView Delegete 实现

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

{
    return mPicStatusesViewController.view; //返回ScrollView上添加的需要缩放的视图
}

- (void)scrollViewDidZoom:(UIScrollView *)scrollView

{
    //缩放操作中被调用
}

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale

{
    //缩放结束后被调用
  }

10iOS3.2 播放视频

NSString *urlString = [NSString stringWithString:@"视频url"];

NSURL *movieUrl = [[NSURL alloc] initWithString:urlString];
    
MPMoviePlayerController *myMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieUrl];
myMoviePlayer.view.frame = CGRectMake(250, 250, 350, 350);
[self.view addSubview:myMoviePlayer.view];    
myMoviePlayer.shouldAutoplay = YES;
myMoviePlayer.scalingMode= MPMovieScalingModeAspectFit;  
[myMoviePlayer play];