Question

好的，我一直有问题覆盖我创建的plist的内容。我已经包含了以下所有代码：

因此，在我的第一个视图控制器中，我创建了plist，然后使用update目录方法更新它。好的，我的问题出现在覆盖plist区域。我的想法是从文件创建一个字典，然后添加/覆盖某些键，然后重新写入该文件。这段代码允许我编写没有错误的对象，但是当我尝试从文件中读取值时，我对所有新值都获取null。

更新：代码现在有效。我需要将Area _＃_ Total_L更改为Area _＃_ Total_L.text。这是因为可以添加到字典中的项目数量有限（请参阅对象类型的答案）。

创建目录：

-(void)Create_Directory {

    // Create File Location

    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0]; //2
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"Temporary_Variable_Repository.plist"];

    NSFileManager *fileManager = [NSFileManager defaultManager];

    if (![fileManager fileExistsAtPath: path])
    {
        NSString *bundle = [[NSBundle mainBundle] pathForResource:@"Temporary_Variable_Repository" ofType:@"plist"];
        [fileManager copyItemAtPath:bundle toPath: path error:&error];
    }

    // End
        NSLog(@"path in ViewController: %@", path);
    DataLocation = path;

}

更新目录：

-(void)Update_Directory {

    NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile: DataLocation];

    //All Variables that need to be saved need to be listed here
    //Creating Directory Example
    //[data setObject:@"Directory" forKey:@"Key"];

    NSLog(@"Saving Variables...");

    int Temp = [[data valueForKey:@"-Run_ID"] intValue]+1;
    NSLog(@"Run ID: %d", Temp);

    [data setObject:[NSNumber numberWithInt:Temp] forKey:@"-Run_ID"];
    [data setObject:Date_Time forKey:@"-Run_Date_Time"];
    [data setObject:@"In Progress" forKey:@"-Run_Status"];
    [data setObject:@"ViewController" forKey:@"-Run_Chapter"];
    [data setObject:@"0" forKey:@"-Run_Page"];
    [data setObject:@"User" forKey:@"-User"];
    [data setObject:@"0001" forKey:@"-User_Device"];

    //End

    BOOL result = [data writeToFile: DataLocation atomically:YES];
    NSLog(result ? @"Yes" : @"No");    
}

覆盖Plist

NSLog(@"Saving Variables...");

//Verify the variables are updated prior to transfer
[self RefreshAreaLabels];

//Close keypad
[self closeKeypad];


//Prep next screen for loading
RoofSlope *NewView = [[RoofSlope alloc] initWithStyle:UITableViewStylePlain];

//Send location of Temp Var Rep
NewView.DataLocation_Pass2 = DataLocation_Pass1;

//Create a copy of Temp Var Rep
NSMutableDictionary *ViewController_Reference = [[NSMutableDictionary alloc] initWithContentsOfFile:DataLocation_Pass1];

//Write variables
[ViewController_Reference setObject:@"AtticArea" forKey:@"-Run_Chapter"];

[ViewController_Reference setObject:[NSString stringWithFormat:@"%@", Area_1_Length_TF.text] forKey:@"Area_1_Length"];
[ViewController_Reference setObject:Area_1_Width_TF.text forKey:@"Area_1_Width"];
[ViewController_Reference setObject:Area_1_Total_L.text forKey:@"Area_1_Total"];

[ViewController_Reference setObject:Area_2_Length_TF.text forKey:@"Area_2_Length"];
[ViewController_Reference setObject:Area_2_Width_TF.text forKey:@"Area_2_Width"];
[ViewController_Reference setObject:Area_2_Total_L.text forKey:@"Area_2_Total"];

[ViewController_Reference setObject:Area_3_Length_TF.text forKey:@"Area_3_Length"];
[ViewController_Reference setObject:Area_3_Width_TF.text forKey:@"Area_3_Width"];
[ViewController_Reference setObject:Area_3_Total_L.text forKey:@"Area_3_Total"];

[ViewController_Reference setObject:Area_4_Length_TF.text forKey:@"Area_4_Length"];
[ViewController_Reference setObject:Area_4_Width_TF.text forKey:@"Area_4_Width"];
[ViewController_Reference setObject:Area_4_Total_L.text forKey:@"Area_4_Total"];

 [ViewController_Reference setObject:@"TEST" forKey:@"-Run_ID"];

[ViewController_Reference setObject:[NSNumber numberWithDouble:[TotalAreaValue_L.text doubleValue]] forKey:@"Total_Area"];

//Debug
NSLog(@"Area_1_Length: %@", [ViewController_Reference valueForKey:@"Area_1_Length"]);
NSLog(@"_Run_ID: %@", [ViewController_Reference valueForKey:@"-Run_ID"]);

//Update Variable Repository
//This writes the updated variables to the plist
BOOL result = [ViewController_Reference writeToFile: DataLocation_Pass1 atomically:YES];    

NSLog(result ? @"Yes" : @"No");

Answer 1

作为苹果文件：

如果数组的内容都是属性列表对象（NSString， NSData，NSArray或NSDictionary对象），由此编写的文件方法可用于使用类方法初始化新数组 arrayWithContentsOfFile：或实例方法 initWithContentsOfFile :.此方法递归验证所有在写出之前，包含的对象是属性列表对象 file，如果所有对象都不是属性列表对象，则返回NO，因为结果文件不是有效的属性列表。

确保所有对象都是属性列表对象（NSString，NSData，NSArray或NSDictionary对象）。

[NSNumber numberWithInt:Temp]可能是问题。

重写一个plist的问题

1 个答案: