获取所有文件的数组并计算大小

//获取所有文件的数组

NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachePath];

for(NSString *path in files) {

NSString*filePath = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",path]];

//累加

folderSize += [[NSFileManager defaultManager]attributesOfItemAtPath:filePath error:nil].fileSize;

}

//获取缓存路径

NSString*cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)objectAtIndex:0];

//返回路径中的文件数组

NSArray*files = [[NSFileManager defaultManager]subpathsAtPath:cachePath];

//    NSLog(@"文件数：%ld",[files count]);

for(NSString *p in files){

NSError*error;

NSString*path = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",p]];

if([[NSFileManager defaultManager]fileExistsAtPath:path])

{

BOOL isRemove = [[NSFileManager defaultManager]removeItemAtPath:path error:&error];

if(isRemove) {

NSLog(@"清除成功");

//这里发送一个通知给外界，外界接收通知，可以做一些操作（比如UIAlertViewController）

self.cacheLabel.text = @"0.00M";

//                    CGFloat MemorySize = [self folderSize] + [self cachesSize];

self.memoryLabel.text = [NSString stringWithFormat:@"%.2fM",[self cachesSize]];

}else{

NSLog(@"清除失败");

}

}

}