[Object-c]获取文件的大小 清除缓存

app功能: 清除缓存

//获取缓存文件路径
-(NSString *)getCachesPath{
// 获取Caches目录路径
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachesDir = [paths objectAtIndex:0];

NSString *filePath = [cachesDir stringByAppendingPathComponent:@"com.zxinsight.yiqiwan"];

return filePath;
}
///计算缓存文件的大小的M
- (long long) fileSizeAtPath:(NSString*) filePath{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){

return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}
- (float ) folderSizeAtPath:(NSString*) folderPath{
NSFileManager* manager = [NSFileManager defaultManager];
if (![manager fileExistsAtPath:folderPath]) return 0;
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];//从前向后枚举器／／／／//
NSString* fileName;
long long folderSize = 0;
while ((fileName = [childFilesEnumerator nextObject]) != nil){

NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
folderSize += [self fileSizeAtPath:fileAbsolutePath];
}
return folderSize/(1024.0*1024.0);
}

-(void)deleteFile {
NSFileManager* fileManager=[NSFileManager defaultManager];
//文件名
NSString *uniquePath=[self getCachesPath];
BOOL blHave=[[NSFileManager defaultManager] fileExistsAtPath:uniquePath];
if (!blHave) {
NSLog(@"no have");
return ;
}else {
NSLog(@" have");
BOOL blDele= [fileManager removeItemAtPath:uniquePath error:nil];
if (blDele) {
NSLog(@"dele success");
}else {
NSLog(@"dele fail");
}
}
}