Crash on Swift Project

[robmontesinos]

Hi Andrea,
I'm having problems implementing AMWaveTransition on a Swift project - iOS 8 - Xcode 6.

The crash message is: -[__NSArrayI setTransform:]: unrecognized selector sent to instance 0x7fba99c5d930

the crash occurs in this method on the line: [view setTransform:CGAffineTransformMakeTranslation(delta, 0)];

Any help with this error and implementing in Swift would be greatly appreciated.

Thanks
Rob

- (void)hideView:(UIView *)view withDelay:(NSTimeInterval)delay andDelta:(float)delta
{
    void (^animation)() = ^{
        [view setTransform:CGAffineTransformMakeTranslation(delta, 0)];
        [view setAlpha:0];
    };
    void (^completion)(BOOL) = ^(BOOL finished){
        [view setTransform:CGAffineTransformIdentity];
    };
    if (self.transitionType == AMWaveTransitionTypeSubtle) {
        [UIView animateWithDuration:self.duration delay:delay options:UIViewAnimationOptionCurveEaseIn animations:animation completion:completion];
    } else if (self.transitionType == AMWaveTransitionTypeNervous) {
        [UIView animateWithDuration:self.duration delay:delay usingSpringWithDamping:0.75 initialSpringVelocity:1 options:UIViewAnimationOptionCurveEaseIn animations:animation completion:completion];
    } else if (self.transitionType == AMWaveTransitionTypeBounce){
        [UIView animateWithDuration:self.duration delay:delay options:UIViewAnimationOptionCurveEaseInOut animations:animation completion:completion];
    }
}

[andreamazz]

Hi @robmontesinos
Can I see your implementation of the visibleCells method?
My guess is that you are not properly passing an array of UIViews, so that method call is calling setTransform on an array instead.

[robmontesinos]

Oh oh. You pretty damn smart. Here you go:

lazy var visibleCells: [AnyObject] = self.waveCells()

func waveCells() -> [AnyObject] {
    var cells = [AnyObject]()
    cells.append(self.mainImageView)
    cells.append(self.mainTableView.visibleCells())
    return cells
}

I wanted lazy initialization but maybe that was not the way to go.

[andreamazz]

Lazy instantiation is fine, but when you append self.mainTableView.visibleCells() you are appending an array. So your cells array looks like this: [UIImageView, NSArray]. In order for that to work you need to flatten the array. A fast way is to use the += operand instead of append:

var cells = [AnyObject]()
cells += self.mainImageView
cells += self.mainTableView.visibleCells()
return cells

[robmontesinos]

Andrea, you rock!
Implementing the above caused a complaint - something about self.mainImageView and AnyObject not being a CGFloat.

This below does work thanks to you.

func waveCells() -> [AnyObject] {
    var cells = [AnyObject]()
    cells.append(self.mainImageView)
    cells += self.mainTableView.visibleCells()
    return cells
}

Salud!!!!

[andreamazz]

Happy to help 👍