我正在努力拯救NSMutableDictionary in applicationDidEnterBackground of AppDelegate.m一个到一个plist文件。保存后，我立即尝试检查该文件是否存在并读回，但找不到该文件。
NSString *photoCacheFilename = @"photoCache.plist";
[photoDict writeToFile:photoCacheFilename atomically:YES];
NSLog(@"File name: %@", photoCacheFilename);
BOOL isFile = [[NSFileManager defaultManager] fileExistsAtPath:photoCacheFilename];
if(isFile)
{
NSLog (@"File found");
NSMutableDictionary *newDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:photoCacheFilename];
}
else
{
NSLog (@"File not found");
}
我按照一些用户的建议修改了代码，但仍然找不到该文件。我不确定我是否正确检查文件是否存在。
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *photoCacheFilename = [documentsPath stringByAppendingPathComponent:@"photoCache.plist"];
[photoDict writeToFile:photoCacheFilename atomically:YES];
BOOL isFile = [[NSFileManager defaultManager] fileExistsAtPath:photoCacheFilename];
if(isFile)
{
NSLog (@"File found");
NSMutableDictionary *newDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:photoCacheFilename];
}
else
{
NSLog (@"File not found");
}
您没有指定正确的路径Documents目录
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *photoCacheFilename = [documentsPath stringByAppendingPathComponent:@"photoCache.plist"]; // Correct path to Documents Dir in the App Sand box
[photoDict writeToFile:photoCacheFilename atomically:YES]; //Write
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