问Xcode UIWebView不使用更改的URL更改页面

EN

@property (weak, nonatomic) IBOutlet UIWebView *webView;
@property float slicenumber;
@property NSURL *dynamicUrl;

- (void)viewDidLoad {
  [super viewDidLoad];
  NSString *fullURL = @"http://localhost:8080/remote/slicer/slice?view=Green&orientation=Axial&scrollTo=.50&size=native&fmt=png";
  NSURL *url = [NSURL URLWithString:fullURL];
  NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
  [self.webView loadRequest:requestObj];
  [self.webView reload];
  self.webView.scrollView.scrollEnabled = NO;
  self.webView.scrollView.bounces = NO;
  self.slicenumber=.5;
  [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(UpdateSlice) userInfo:nil repeats:YES];}

- (IBAction)handlePan:(UIPanGestureRecognizer *)recognizer {
  CGPoint translation = [recognizer translationInView:self.view];
  [recognizer setTranslation:CGPointMake(0, 0) inView:self.view];

  self.slicenumber=self.slicenumber+translation.y/350;
  if (self.slicenumber<0) {
    self.slicenumber=0;
  }
  if (self.slicenumber>1) {
    self.slicenumber=1;
  }
  self.sliceloc.text= [NSString stringWithFormat:@"%.2f",self.slicenumber];
  NSString *fullURL2 = [NSString stringWithFormat:@"http://localhost:8080/remote/slicer/slice?view=Green&orientation=Axial&scrollTo=%.2f&size=native&fmt=png",self.slicenumber];
  self.dynamicUrl = [[NSURL alloc] initWithString:[fullURL2 stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]];
  NSLog(@"urlString = %@",self.dynamicUrl);}

- (void)UpdateSlice {
  [self.webView loadRequest:[NSURLRequest requestWithURL:self.dynamicUrl]];
  [self.webView reload];}