我正在尝试创建一个尚不存在的UIManagedDocument。这里是我的代码:UIManagedDocument saveToURL总是返回false
url = [NSURL URLWithString:@"file://ProjectSSDB"];
document = [[UIManagedDocument alloc] initWithFileURL:url];
if ([[NSFileManager defaultManager] fileExistsAtPath:[url path]]) {
[document openWithCompletionHandler: ^(BOOL success) {
if (success) [ProjectSSViewController documentIsReady];
if (!success) NSLog(@"Couldn't open document at %@", url);
}];
} else {
[document saveToURL:url forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success) {
NSLog(@"Returned %d", success);
if (success) [ProjectSSViewController documentIsReady];
if (!success) NSLog(@"Couldn't create document at %@", url);
}];
}
我的问题是,该文件不存在,而saveToURL操作似乎总是返回false。无论如何,我可以进一步调试,为什么会发生这种情况?
编辑:
好了,所以我不能写入到该网址。我现在试着这样做:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSURL *url = [NSURL URLWithString:documentsDirectory];
NSLog(@"The URL is %@", [url absoluteString]);
当它运行时,日志似乎返回URL为空。还有什么我做错了吗?
我已经更新我的回答,请使用我已经张贴 – Manu