在ios中的Document中创建多级文件夹以及文件


- (NSString *)dataPath:(NSString *)file
{

NSString *path = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"badge"];
BOOL bo = [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];
NSAssert(bo,@"创建目录失败");

NSString *result = [path stringByAppendingPathComponent:file];

return result;

}


- (void)viewDidLoad
{
[super viewDidLoad];
//此处首先指定了图片存取路径(默认写到应用程序沙盒 中)
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

//并给文件起个文件名
NSString *imageDir = [[[paths objectAtIndex:0] stringByAppendingPathComponent:@"163"] stringByAppendingPathComponent:@"songzi"];

//存放图片的文件夹
NSString *imagePath =[imageDir stringByAppendingPathComponent:@"0.png"];

NSData *data = nil;

//检查图片是否已经保存到本地
if([self isExistsFile:imagePath]){
data=[NSData dataWithContentsOfFile:imagePath];
}else{
data = [NSData dataWithContentsOfURL:[NSURL URLWithString: @"http://211.154.154.96:7071/press/163/songzi/0.jpg"]];

//创建文件夹路径
[[NSFileManager defaultManager] createDirectoryAtPath:imageDir withIntermediateDirectories:YES attributes:nil error:nil];

//创建图片
[UIImagePNGRepresentation([UIImage imageWithData:data]) writeToFile:imagePath atomically:YES];
}
imageView.image = [UIImage imageWithData:data];
}

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