Question

我正在尝试将NSMutableArray保存到预先存在的plist中。

当我尝试：

NSError *errorDesc;
NSPropertyListFormat format;
NSString *plistPath;
NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,  YES) objectAtIndex:0];
plistPath = [rootPath stringByAppendingPathComponent:@"Array_Label_Generiche.plist"];
if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath]) {
   NSLog(@"prima volta");
   plistPath = [[NSBundle mainBundle] pathForResource:@"Array_Label_Generiche" ofType:@"plist"];
}
NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:plistPath];
NSMutableArray *temp = (NSMutableArray *)[NSPropertyListSerialization
                                                      propertyListFromData:plistXML
                                                      mutabilityOption:NSPropertyListMutableContainersAndLeaves
                                                      format:&format
                                                        errorDescription:&errorDesc];
if (!temp) {
  NSLog(@"Error reading plist: %@, format: %lu", errorDesc, format);
}

contatore = (int)temp.count ;

NSMutableDictionary *dictionary = [[NSMutableDictionary alloc]init];
[dictionary setObject:array_copiato forKey:[NSString stringWithFormat: @"%@", [alertView textFieldAtIndex:0].text]];
NSDictionary *dictionary_da_salvare = [[NSDictionary alloc ] initWithDictionary: dictionary];

//AGGIUNGO I DATI CREATI
NSLog(@"TEMP %@",temp);
[temp addObject:dictionary_da_salvare];
BOOL didWriteArray = [temp writeToFile:plistPath atomically:YES];
if (didWriteArray)
{
     NSLog(@"Write to .plist file is a SUCCESS!");
}
else
{
     NSLog(@"Write to .plist file is a FAILURE!");
}

在这种情况下，输出显示“写入.plist文件是FAILURE！”。

在Apple指南中，我读到在写入plist之前我必须序列化数据。

然后我尝试编写这些代码行：

NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:temp format:NSPropertyListXMLFormat_v1_0 errorDescription:&errorDesc];
if(plistData == nil){
    NSLog (@"error writing to file: %@", errorDesc);
}

当我运行应用程序时，输出区域显示为：

写入文件时出错：属性列表格式无效（属性列表不能包含'CFType'类型的对象。）写入.plist文件是一个失败！

我认为因为数组测试是NSMutableArray，因为我已阅读Apple指南：

NSPropertyListSerialization类提供转换的方法属性列表与几种序列化格式之间的对象。属性列表对象包括NSData，NSString，NSArray，NSDictionary，NSDate，和NSNumber对象。这些物体与他们的免费桥接各自的Core Foundation类型（CFData，CFString等）。

将NSArray写入plist

0 个答案: