的UIViewController通float值的UIView方法

Question

我有一個HandlePan方法的視圖控制器：

-(void)handlePan:(UIPanGestureRecognizer *)gestureRecognizer 
{ 
    UIView *piece = [gestureRecognizer view]; 

    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer]; 

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) { 
     CGPoint translation = [gestureRecognizer translationInView:[piece superview]]; 
     CGFloat panSpeed = (translation.x+translation.y)/2; 
     NSLog(@"PanSpeed %f",panSpeed); 
     [someview viewPan:panSpeed]; 
    } 

} 

然後，我有一個UIView稱爲someview與方法：

- (void) viewPan:(float *)PanAngle { 
    NSLog(@"Panning...%@",PanAngle); 
} 

但我得到一個nil爲PanAngle。

這樣做的正確方法是什麼？謝謝！

Answer 1

浮動不是一個對象，所以沒有必要對你是如何定義的語句[someview viewPan：panSpeed（得到一個參考）「someview」指針

- (void)viewPan:(float)PanAngle{ 
    NSLog(@"Panning...%f",PanAngle); 
}