Question

我目前有一个静态背景颜色：

self.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 1.0, alpha: 1.0)

我如何编码在一定的秒数内创建一系列动画颜色（例如每种颜色5秒），然后返回到颜色循环的开头？

我尝试了以下内容......

self.backgroundColor = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0)
UIView.animate(withDuration: 5.0, animations: { () -> Void in
    self.backgroundColor = UIColor(red: 0.0, green: 1.0, blue: 0.0, alpha: 1.0);
    self.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 1.0, alpha: 1.0)
})

......但这只是留在最后的蓝色。

Answer 1

您必须制作嵌套动画

    self.backgroundColor = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0)
    UIView.animate(withDuration: 5.0, animations: { () -> Void in
        self.backgroundColor = UIColor(red: 0.0, green: 1.0, blue: 0.0, alpha: 1.0);
    },
     completion: { finished in
        UIView.animate(withDuration: 5.0, animations: { () -> Void in
            self.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 1.0, alpha: 1.0)
        }, completion: { finished in
            //other color do the same
        })

    })

Answer 2

你可以试试这个：

onsubmit: function(e) {
                    var wholeText = editor.getContent();
                    var selected_text = editor.selection.getContent();

                    shortcode = '[checklist-box title="' + e.data.title + '" extraTitle="' + e.data.extraTitle + '" extraUrl="' + e.data.extraUrl + '"]' + selected_text + '[/checklist-box]';

                    var main = wholeText.replace(selected_text,shortcode);
                    editor.execCommand('mceSetContent', 0, main);
                }

动画背景颜色在Swift 3中

2 个答案: