- 计算单个文件大小
+(float)fileSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if([fileManager fileExistsAtPath:path]){ long long size=[fileManager attributesOfItemAtPath:path error:nil].fileSize;
return size/1024.0/1024.0;
}
return 0;
}
- 计算目录大小
+(float)folderSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
float folderSize;
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileName in childerFiles) {
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
folderSize +=[FileService fileSizeAtPath:absolutePath];
}
//SDWebImage框架自身计算缓存的实现
folderSize+=[[SDImageCache sharedImageCache] getSize]/1024.0/1024.0;
return folderSize;
}
return 0;
}
- 清除缓存文件
+(void)clearCache:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileName in childerFiles) {
//如有需要，加入条件，过滤掉不想删除的文件
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
[fileManager removeItemAtPath:absolutePath error:nil];
}
}
[[SDImageCache sharedImageCache] cleanDisk];
}
- 数据存储到iCloud
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSURL *fileURL = [NSURL fileURLWithPath:[documentsPath stringByAppendingPathComponent:@"Document.pages"]];
//这里的 identifier 应该设置为 entitlements 的第一个元素；当你使用这段代码的时候需要把 identifier 设置为你自己的真实 identifier
NSString *identifier = nil;
NSURL *ubiquitousContainerURL = [fileManager URLForUbiquityContainerIdentifier:identifier];
NSURL *ubiquitousFileURL = [ubiquitousContainerURL URLByAppendingPathComponent:@"Document.pages"];
NSError *error = nil;
BOOL success = [fileManager setUbiquitous:YES
itemAtURL:fileURL
destinationURL:ubiquitousFileURL
error:&error];
if (!success) {
NSLog(@"[Error] %@ (%@) (%@)", error, fileURL, ubiquitousFileURL);
}
});
Snip20160511_2.png
