Question

我试图保存高分，我有5个文本框可以获得5个高分，而且我想在他们被殴打时更换它们，显然。但对我来说，它总是进入if语句：if ([hs.text floatValue] == 0)，它只是替换了第一个高分文本框，无论我运行它多少次。我做错了什么？

- (void)viewDidLoad
    {
        [super viewDidLoad];
        highscore = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore"];
        highscore1 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore1"];
        highscore2 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore2"];
        highscore3 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore3"];
        highscore4 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore4"];

    if ([hs.text floatValue] == 0) {
        hs.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if ([hs1.text floatValue] == 0) {
        hs1.text = [NSString stringWithFormat:@"%.4f",finTime];        
    }
    else if ([hs2.text floatValue] == 0) {
        hs2.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if ([hs3.text floatValue] == 0) {
        hs3.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if ([hs4.text floatValue] == 0) {
        hs4.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if (finTime < highscore) {
        hs4.text = hs3.text;
        hs3.text = hs2.text;
        hs2.text = hs1.text;
        hs1.text = hs.text;
        hs.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if (finTime < highscore1) {
        hs4.text = hs3.text;
        hs3.text = hs2.text;
        hs2.text = hs1.text;
    }
    else if (finTime < highscore2) {
        hs4.text = hs3.text;
        hs3.text = hs2.text;
        hs2.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if (finTime < highscore3) {
        hs4.text = hs3.text;
        hs3.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    else if (finTime < highscore4) {
        hs4.text = [NSString stringWithFormat:@"%.4f",finTime];
    }
    [self saveScore];
}

-(void) saveScore
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setFloat:finTime forKey:@"highScore"];
    [defaults setFloat:finTime forKey:@"highScore1"];
    [defaults setFloat:finTime forKey:@"highScore2"];
    [defaults setFloat:finTime forKey:@"highScore3"];
    [defaults setFloat:finTime forKey:@"highScore4"];

    [[NSUserDefaults standardUserDefaults] synchronize];

}

Answer 1

问题是hs.text被调用时，viewDidLoad将不会被设置（或者如果你在xib / Storyboard中那样设置为0）。因此，它始终进入第一个if语句，并且您不使用NSUserDefaults中存储的值。

我建议按如下方式设置文本字段：

- (void)viewDidLoad
{
  [super viewDidLoad];
  highscore = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore"];
  highscore1 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore1"];
  highscore2 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore2"];
  highscore3 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore3"];
  highscore4 = [[NSUserDefaults standardUserDefaults] floatForKey: @"highScore4"];

  if (highscore)
    hs.text = [NSString stringWithFormat:@"%.4f", highscore];
  if (highscore1)
    hs1.text = [NSString stringWithFormat:@"%.4f", highscore1];
  if (highscore2)
    hs2.text = [NSString stringWithFormat:@"%.4f", highscore2];
  if (highscore3)
    hs3.text = [NSString stringWithFormat:@"%.4f", highscore3];
  if (highscore4)
    hs4.text = [NSString stringWithFormat:@"%.4f", highscore4];

  ...

此外，我认为saveScore方法无法正常工作，因为它将所有高分设置为finTime。您可能希望将它们设置为每个hs文本字段的浮点值。

保存高分并不适合我

1 个答案: