介紹下iOS開(kāi)發(fā)動(dòng)畫的幾種方式吧：

一. 代碼放在Begin和Commit之間：

[UIView beginAnimations:nil context:nil]; // 開(kāi)始動(dòng)畫
// Code...
[UIView commitAnimations]; // 提交動(dòng)畫

e.g.

[UIView beginAnimations:nil context:nil]; // 開(kāi)始動(dòng)畫
[UIView setAnimationDuration:10.0]; // 動(dòng)畫時(shí)長(zhǎng)

/**
 *  圖像向下移動(dòng)
 */
CGPoint point = _imageView.center;
point.y += 150;
[_imageView setCenter:point];

[UIView commitAnimations]; // 提交動(dòng)畫

但這一方式好像是有些過(guò)時(shí)了梅猿，API文檔最后面是這樣寫的：

Use of this method is discouraged in iOS 4.0 and later. You should use the block-based animation methods to specify your animations instead.

二. Block

UIView類幾個(gè)類方法用于實(shí)現(xiàn)相對(duì)簡(jiǎn)單的動(dòng)畫
e.g.

//準(zhǔn)備工作
lazy var box:UIView = UIView()
.
.
.
self.view.addSubview(box)
box.backgroundColor = UIColor.red
box.snp.makeConstraints { (make) -> Void in
    make.width.height.equalTo(50)
    make.centerY.equalTo(self.view)
    make.left.equalTo(self.view.snp.left)
}

1. 基本動(dòng)畫

        UIView.animate(withDuration: 3) { 
            self.box.frame.origin.x = self.view.frame.width - 50
        }

2. 添加結(jié)束處理

        UIView.animate(withDuration: 3, animations: { 
            self.box.frame.origin.x = self.view.frame.width - 50
        }) { (isFinished) in
            if isFinished {
                UIView.animate(withDuration: 3, animations: { 
                    self.box.frame.origin.x = 0
                })
            }
        }

3. 添加動(dòng)畫配置

        UIView.animate(withDuration: 3, delay: 0.0, options: [.repeat,.autoreverse], animations: {
            self.box.frame.origin.x = self.view.frame.width - 50
        }) { (isFinished) in
            
        }

4. Spring動(dòng)畫

        UIView.animate(withDuration: 3, delay: 1, usingSpringWithDamping: 1.0, initialSpringVelocity: 5.0, options: .curveEaseIn, animations: {
            self.box.frame.origin.x = self.view.frame.width - 50
        }) { (isFinished) in
            
        }

5. 關(guān)鍵幀動(dòng)畫

    func doKeyFrameworkAnimation() {
        
        UIView.animateKeyframes(withDuration: 4.0, delay: 0.0, options: [.calculationModeCubic, .calculationModeLinear], animations: { 
            let colors:[UIColor] = [UIColor.black,UIColor.red,UIColor.blue,UIColor.yellow]
            let frames:[CGRect] = [CGRect.init(x: 0, y: 0, width: 20, height: 20),
                                   CGRect.init(x: 50, y: 50, width: 30, height: 30),
                                   CGRect.init(x: 100, y: 100, width: 40, height: 40),
                                   CGRect.init(x: 150, y: 150, width: 50, height: 50)]

            for index in 0 ..< colors.count {
                
                UIView.addKeyframe(withRelativeStartTime: Double(index)/Double(colors.count), relativeDuration: Double(1)/Double(colors.count), animations: {
                    self.box.backgroundColor = colors[index]
                    self.box.frame = frames[index]
                })
            }

        }) { (isFinished) in
            
        }   
    }

以上各方法說(shuō)明與參數(shù)說(shuō)明請(qǐng)參看文檔。不復(fù)制撕阎，不翻譯了??

三. Core Foundation(略)

四. Lottie

Lottie Git
使用這個(gè)庫(kù)以后，很多動(dòng)畫都讓UED去做了伸头。終于刚陡，開(kāi)發(fā)不用再寫動(dòng)畫了~！碧聪？??