Objective-C：獲取最近的NSView拖動NSView

如果我有一個包含10個子視圖的NSView，並且拖動其中一個子視圖，那麼確定剩下的哪些視圖關閉到拖動的視圖最簡單的方法是什麼？我的代碼正在工作，但我不知何故覺得我在用扳手來調整小提琴。有沒有更優雅的方式？Objective-C：獲取最近的NSView拖動NSView

子視圖是該視圖的父視圖的子視圖的陣列（因此它包括這個視圖中）
的子視圖的工具提示包含他們的頁面＃格式化像「Page_＃」

- (void) mouseUp: (NSEvent*) e { 

    //set up a ridiclous # for current distance 
    float mtDistance = 12000000.0; 

    //get this page number 
    selfPageNum = [[[self toolTip] substringFromIndex:5] intValue]; 

    //set up pageViews array 
    pageViews = [[NSMutableArray alloc] init]; 

    //loop through the subviews 
    for (int i=0; i<[subviews count]; i++) { 

      //set up the view 
      thisView = [subviews objectAtIndex:i]; 

      //filter for view classes 
      NSString* thisViewClass = [NSString stringWithFormat:@"%@", [thisView className]]; 
      if ([thisViewClass isEqual:@"Page"]) { 

        //add to the pageViews array 
        [pageViews addObject:thisView]; 

        if (self != thisView) { 
          //get the view and self frame 
          NSRect movedViewFrame = [self frame]; 
          NSRect thisViewFrame = [thisView frame]; 

          //get the location area (x*y) 
          float movedViewLoc = movedViewFrame.origin.x * (movedViewFrame.origin.y * -1); 
          float thisViewLoc = thisViewFrame.origin.x * (thisViewFrame.origin.y * -1); 

          //get the difference between x locations 
          float mtDifference = movedViewLoc - thisViewLoc; 
          if (mtDifference < 0) { 
            mtDifference = mtDifference * -1; 
          } 

          if (mtDifference < mtDistance) { 
            mtDistance = mtDifference; 
            closesView = thisView; 
          } 
        } 

      }//end class check 
     }//end loop 

//....more stuff 

}

來源

2011-09-16 PruitIgoe

http://en.wikipedia.org/wiki/Distance

$distance formula$

sqrt(pow((x2 - x1), 2) + pow((y2 - y1), 2)))

編輯：既然你只需要找到笑rtest距離，而不是確切的距離，你不需要採取平方根。感謝您的見解Abizern

pow((x2 - x1), 2) + pow((y2 - y1), 2)

來源

2011-09-16 22:01:03

距離的標準答案。但是，當比較距離時，不需要浪費計算平方根的週期。如果d1 Abizern

Objective-C：獲取最近的NSView拖動NSView

回答

相關問題