1

保存数据:

- (NSString *)dataFilePath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:kFilename];
}
- (void)applicationWillTerminate:(NSNotification *)notification
{
NSMutableArray *array = [[NSMutableArray alloc] init];

NSNumber *number = [NSNumber numberWithInt:points];
  [array addObject:number];

  [array writeToFile:[self dataFilePath] atomically:YES];
  [array release];
}

读取数据: BestLabel.text 会显示高分。我收到警告:“赋值使指针从没有强制转换的整数”

-(void)LoadData{
BestLabel.center = CGPointMake(150,300);

NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
    NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    loadint = [array objectAtIndex:0];
    NSString *myString35 = [NSString stringWithFormat:@"%d", loadint]; 
    BestLabel.text = myString35;
    [array release];
}
}

我从中得到的示例代码可以毫无问题地保存和加载文本字段。我想我可以将字符串转换为 int,但这似乎没有必要。谢谢你的帮助!

编辑:

- (void)applicationWillTerminate:(NSNotification *)notification

{ NSMutableArray *array = [[NSMutableArray alloc] init];

if (points > highscore){

    NSString *myString35 = [NSString stringWithFormat:@"%d", points];
    [array addObject:myString35];
}else {
    NSString *myString35 = [NSString stringWithFormat:@"%d", highscore];
    [array addObject:myString35];
}


NSNumber *number = [NSNumber numberWithInt:GreenBlot.center.x];
[array addObject:number];
NSNumber *number2 = [NSNumber numberWithInt:GreenBlot.center.y];
[array addObject:number2];

现在加载:

NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
    NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    BestLabel.text = [array objectAtIndex:0];
    highscore = [[array objectAtIndex:0] intValue];


    lx = [[array objectAtIndex:1] intValue];
    ly = [[array objectAtIndex:2] intValue];
    GreenBlot.center = CGPointMake( lx,ly);


    [array release];
}

lx 和 ly 是整数。我首先尝试了 CGPointMake( [[array objectAtIndex:1] intValue], [[array objectAtIndex:2] intValue] )。同样的结果,GreenBlot 以 0,0 为中心。知道为什么吗?

4

3 回答 3

2

最简单的方法是使用NSNumber'sintValue方法:

loadint = [[array objectAtIndex:0] intValue];
于 2009-09-04T04:51:13.910 回答
1

您需要下面的第二行:

loadint = [array objectAtIndex:0];
int score = [loadint intValue];
NSString *myString35 = [NSString stringWithFormat:@"%d", loadint]; 

如果您只保存一个值,请使用带有键的 NSDictionary,以便您更轻松地标记要保存的值。

于 2009-09-04T04:55:05.570 回答
0

CGPointMake 定义:

CGPoint CGPointMake(
    float x,
    float y
)

您正在使用 GreenBlot.center.x 这大概是一个浮点数并将其作为一个 int 提供给 NSNumber ...。返回并查看变量的类型并更改为 [NSNumber numberWithFloat:...] 和 lx = [ [数组 objectAtIndex:1] floatValue]; 等,视情况而定。

此外,您在编辑原始问题时创建了一个不同的问题。

于 2009-09-04T11:43:47.447 回答