ios - 更新图像位置

Question

我是 iOS 新手。我正在尝试在特定位置绘制图像。我正在使用 NSMutableArray 来存储它的位置。

// I am calling addCutter method in init method of ViewController
- (void) addCutter 
{
     //gameModel.cutters is NSMutable Array for position
      [gameModel.cutters addObject:[NSValue valueWithCGRect:gameModel.cutterRect]];

      cutter = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"cutter.png"]];

      //cutter is UIImageView
      [cutter setFrame:[[gameModel.cutters objectAtIndex:[gameModel.cutters count]-1] CGRectValue]];

      cutter.tag = [cutters count] + 100;

      [cutters addObject:cutter];

      [self.view addSubview:[cutters objectAtIndex:([cutters count]-1)]];

}

但是图像没有更新它的位置

//code for update the position

-(void) moveCutter 
{
     for(int i=0;i<[gameModel.cutters count]-1;i++) 
     {
          CGRect newCutterRect = [[gameModel.cuttersobjectAtIndex:i] CGRectValue];

          newCutterRect.origin.x += [[disX objectAtIndex:i]floatValue];
          newCutterRect.origin.y += [[disY objectAtIndex:i]floatValue];

          [gameModel.cutters replaceObjectAtIndex:i withObject:[NSValue valueWithCGRect:newCutterRect]];
     }
}

Answer 1

您实际上需要为 View 设置新框架。您刚刚更改了 View 原始框架的副本，它与 View 不再有任何联系。