无法弄清楚为什么archiveRootObject无法写入文件

Question

这似乎在模拟器中工作正常但在设备上没有写入文件。

这是代码。

-(void)saveOld{

NSArray *saveState = [NSArray arrayWithObjects:headArray,dropQArray,[NSNumber numberWithInt:dropLimit],[NSNumber numberWithInt:dropCount],[NSNumber numberWithInt:score],[NSNumber numberWithInt:level],[NSNumber numberWithInt:maxChain],nil];

NSMutableString *path = [[NSHomeDirectory() mutableCopy]autorelease];
[path appendString:@"/saveState"];

BOOL saved = [NSKeyedArchiver archiveRootObject:saveState toFile:path];
NSLog(@"did save state %d",saved);
path = [[NSHomeDirectory() mutableCopy]autorelease];
[path appendString:@"/isSaveState"];


saved = [NSKeyedArchiver archiveRootObject:[NSNumber numberWithBool:1] toFile:path];
NSLog(@"did save state %d",saved);
}

Answer 1

iPhone上没有主目录：D

你应该改用：

NSString *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

这将为您提供基本文档目录，然后为其附加字符串。