ios - 保存触摸点位置坐标

Question

我有 UIWebView 用于显示 HTML 文章页面。我使用 UILongPressGesture 获取触摸位置坐标。我需要将此坐标保存到 NSUserDefaults 或任何地方，稍后再获取它以供其他用途。如何保存这些触摸位置坐标

-(void)viewDidLoad{

UILongPressGestureRecognizer *tap = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(tapTest:)];
    [tap setDelegate:self];
    [wbCont.scrollView addGestureRecognizer:tap];

}


- (void)tapTest:(UILongPressGestureRecognizer *)sender {
    NSLog(@"coordinate is %f %f", [sender locationInView:wbCont].x,  [sender locationInView:wbCont].y);

}


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Answer 1

在 NSUserDefaults 中的存储位置

  - (void)tapTest:(UILongPressGestureRecognizer *)sender 
    {
        NSLog(@"coordinate is %f %f", [sender locationInView:wbCont].x,  [sender locationInView:wbCont].y);

    CGFloat x = [sender locationInView:wbCont].x;
    CGFloat y = [sender locationInView:wbCont].Y;

      NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
      [userDefaults setFloat:x forKey:@"xPoint"];
      [userDefaults setFloat:y forKey:@"yPoint"];
      [userDefaults synchronize];

    }

并从 NSUserDefaults 中检索点

NSUserDefaults *data = [NSUserDefaults standardUserDefaults];  
float xValue = [data floatForKey:@"xPoint"];
float yValue = [data floatForKey:@"yPoint"];