ios - 将保存在plist中的NSNumbers转换为整数

Question

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将显示高分。我收到警告:“赋值从指针进行整数转换而无需强制转换”

-(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是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正以0,0为中心。知道为什么吗？

Answer 1

最简单的方法是使用NSNumber的 intValue 方法:

loadint = [[array objectAtIndex:0] intValue];