ios - UIViewController 将浮点值传递给 UIView 方法

Question

我有一个带有HandlePan方法的 ViewController：

-(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];
    }

}

然后我UIView调用someview了这个方法：

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

但我得到了一个nilfor PanAngle。

这样做的正确方法是什么？谢谢！

Answer 1

float 不是对象，所以不需要指针

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