本文介绍了一个用于获取iOS设备上当前可用磁盘空间的方法。通过使用Objective-C编程语言，该方法能够准确地计算出设备上的剩余磁盘空间，并以GB为单位显示出来。
+ (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]/1024.0f/1024.0f/1024.0f;
totalFreeSpace = [freeFileSystemSizeInBytes floatValue]/1024.0f/1024.0f/1024.0f;
NSLog(@"Memory Capacity of %f GB with %f GB Free memory available.", totalSpace, totalFreeSpace);
} else {
NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
}
return totalFreeSpace;
}
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