本来很简单的一个东西,但是百度出来,各种答案,调研了爱奇艺,腾讯课堂,慕课网,网易云课堂App,发现同一部手机,居然计算出来的存储空间也是各不相同,相比较腾讯课堂,慕课网,网易云课堂App这三个误差较小.

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直接上代码(总结别人方法)

- (float)getFreeDiskspace{
    float totalSpace;
    float totalFreeSpace=0.f;
    NSError *error = nil;
    NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
    if (dictionary) {
        NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];
        NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
        totalSpace = [fileSystemSizeInBytes floatValue];
        totalFreeSpace = [freeFileSystemSizeInBytes floatValue];
    }
    return totalFreeSpace;
}

-(float)getTotalDiskSpaceInBytes {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    struct statfs tStats;
    statfs([[paths lastObject] cString], &tStats);
    float totalSpace = (float)(tStats.f_blocks * tStats.f_bsize);
    return totalSpace;
}