我无法弄清楚如何正确实现UILongPressGestureRecognizer

Question

我正在尝试实现UILongPressGestureRecognizer方法，但我不确定我是否正确实现了代码。我试图用长按更改为工具栏实现的颜色。

AwesomeFloatingToolbar.m


- (void) longPress:(UILongPressGestureRecognizer *)recognizer {

if (recognizer.state == UIGestureRecognizerStateBegan) {

    for (NSUInteger i = 0; i < [self.colors count] ; i++) {


        if (i < 2) {
            [self.colors objectAtIndex:i+1];


        } else if (i == 2) {

            [self.colors objectAtIndex:i+2];



        } else if (i == 3) {
            [self.colors objectAtIndex:0];

        }

    }

    for (UILabel *thisLabel in self.labels) {
                  NSUInteger currentLabelIndex = [self.labels indexOfObject:thisLabel];
                  UIColor *colorForThisLabel = [self.colors objectAtIndex:currentLabelIndex];
                   thisLabel.backgroundColor = colorForThisLabel ;
    }
}

这是self.colors

  self.currentTitles = titles;
    self.colors = [@[[UIColor colorWithRed:199/255.0 green:158/255.0 blue:203/255.0 alpha:1],
                    [UIColor colorWithRed:255/255.0 green:105/255.0 blue:97/255.0 alpha:1],
                    [UIColor colorWithRed:222/255.0 green:165/255.0 blue:164/255.0 alpha:1],
                    [UIColor colorWithRed:255/255.0 green:179/255.0 blue:71/255.0 alpha:1]]mutableCopy];