分享这个功能基本每个APP都会有，我今天给大家分享一款我自己封装好的，代码的话，我会加到文章最后可以去下载，比较简单，先上个效果图吧：
友盟分享3.gif
这个代码主要都在ShareView.swift文件里，比较简单，我觉得效果挺实用的，不想动手的朋友，可以直接拿着撸。
下面我就一步一步说说怎么实现的：
第一步确定你要分享给别人什么玩意，无非就是图片，文字内容，标题，URL吧，我们来定义几个属性
private var shareContent:String!
private var shareImage:UIImage!
private var shareUrl:String!
private var shareTitle:String!
这里我直接用private来修饰了，作为一个准全栈工程师，这点严谨性还是得有的，接着我大致来说说我的思路吧，我准备先添加个灰色视图(bgView)当遮罩背景，然后在添加一个充当容器的视图(contentView)在它上面做些文章，当然ShareView是要集成自UIView的，毕竟封装的东西越简单越好，别人一看就能懂，自己也得劲。（适当装逼，有益健康）
我准备在这个contentView上面添加一个可以左右滑动的UIScollView,中间是个UIPageControl，下面直接搞个UIButton，基本控件就这么多
private var bgView:UIView!
private var contentView:UIView!
private var rootVC:UIViewController!
private var scrollView:UIScrollView!
private var pageControl:UIPageControl!
有人会有疑惑rootVC是个什么鬼，关于这个咱们得往大东家友盟看了，人家有个参数专门让你传的，你不传不行啊是吧，接着往下看。这里为了表达出我优雅的封装，代码的可扩展性，我依然决断的把contentView的高度当成个属性拿出来了，你可以随意写高度，绝对不定死。
private var contentHeight:CGFloat = 220
不闲扯了，下面上代码：
初始化布局，都在这里了
override init(frame: CGRect) {
super.init(frame: frame)
//添加一个遮罩视图
self.bgView = UIView.init(frame: self.bounds)
self.bgView.backgroundColor = UIColor.blackColor()
self.bgView.alpha = 0.0
self.addSubview(self.bgView)
//给遮罩添加一个手势，用来隐藏视图并移除
let tapGesture = UITapGestureRecognizer.init(target: self, action: #selector(self.bgViewTapped))
self.bgView.addGestureRecognizer(tapGesture)
//这个是容器视图，上面的有scrollView、pageControl、cancelBtn三个子视图
self.contentView = UIView.init(frame: CGRectMake(0, CGRectGetHeight(frame), CGRectGetWidth(frame), contentHeight))
self.contentView.backgroundColor = UIColor.groupTableViewBackgroundColor()
self.addSubview(self.contentView)
//数组里面是两个数组，第一个数组管图片文件名，第二个管标题名
let sharePaltformArray = [
[ "share_weixin", "share_friend", "share_sina" , "share_qq", "share_zone"],
[ "微信","朋友圈", "微博", "QQ", "QQ空间"]
]
//添加一个可以左右滑动的视图
self.scrollView = UIScrollView.init(frame: CGRectMake(0, 0, CGRectGetWidth(frame), 130))
self.scrollView.showsHorizontalScrollIndicator = false
self.scrollView.showsVerticalScrollIndicator = false
self.scrollView.pagingEnabled = true
self.scrollView.delegate = self
self.scrollView.backgroundColor = UIColor.whiteColor()
self.scrollView.contentOffset = CGPointMake(0, 0)
self.scrollView.contentSize = CGSizeMake(CGRectGetWidth(frame) * CGFloat(self.pageNum(sharePaltformArray[0].count)), 0)
self.contentView.addSubview(self.scrollView)
//这个是显示UIScrollView到哪一页的小按钮
self.pageControl = UIPageControl.init(frame: CGRectMake(0, CGRectGetHeight(self.scrollView.frame), CGRectGetWidth(frame), 35))
self.pageControl.backgroundColor = UIColor.whiteColor()
self.pageControl.currentPageIndicatorTintColor = UIColor.grayColor()
self.pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
self.pageControl.numberOfPages = pageNum(sharePaltformArray[0].count)
self.contentView.addSubview(self.pageControl)
//下面这一大坨全是将的怎么在scrollView上布局小图标
let buttonWidth:CGFloat = 55.0
let buttonGap = ( CGRectGetWidth(frame) - buttonWidth * 4 ) / 5
for i in 0 ..< 5 {
let shareButton = UIButton(type:.Custom)
let btnRect = CGRectMake(buttonGap * ( CGFloat(i) + 1) + buttonWidth * CGFloat(i) + (i % 4 == 0 && i != 0 ? 20 : 0), 40, buttonWidth, buttonWidth)
shareButton.frame = btnRect
shareButton.tag = 100 + i
shareButton.addTarget(self, action: #selector(self.shareButtonClicked(_:)), forControlEvents: .TouchUpInside)
shareButton.setBackgroundImage(UIImage(named: sharePaltformArray[0][i]), forState: .Normal)
shareButton.setBackgroundImage(UIImage(named: sharePaltformArray[0][i] + "_hover"), forState: .Highlighted)
shareButton.layer.cornerRadius = buttonWidth / 2
shareButton.layer.masksToBounds = true
self.scrollView.addSubview(shareButton)
let shareLabel = UILabel.init(frame: CGRectMake(CGRectGetMinX(shareButton.frame), CGRectGetMaxY(shareButton.frame) + 10 , CGRectGetWidth(shareButton.frame), 15))
shareLabel.font = UIFont.systemFontOfSize(13)
shareLabel.textColor = UIColor.init(red: 0.24, green: 0.24, blue: 0.25, alpha: 1.0)
shareLabel.textAlignment = .Center
shareLabel.text = sharePaltformArray[1][i]
self.scrollView.addSubview(shareLabel)
}
//最后就是添加个取消按钮了
let cancelBtn = UIButton(type:.Custom)
cancelBtn.frame = CGRectMake(0, CGRectGetHeight(self.contentView.frame) - 44, CGRectGetWidth(self.contentView.frame), 44)
cancelBtn.backgroundColor = UIColor.whiteColor()
cancelBtn.setTitle("取消", forState: .Normal)
cancelBtn.setTitleColor(UIColor.blackColor(), forState: .Normal)
cancelBtn.titleLabel?.font = UIFont.systemFontOfSize(16)
cancelBtn.addTarget(self, action: #selector(self.cancelBtnClicked), forControlEvents: .TouchUpInside)
self.contentView.addSubview(cancelBtn)
}
然后对外写个方法，用来把图片，内容，标题，url这些乱七八糟的东西全传进来
func setShareModel(content:String , image:UIImage , url:String , title:String) {
self.shareContent = content
self.shareImage = image
self.shareUrl = url
self.shareTitle = title
}
下面是取消按钮和遮罩视图的轻拍手势响应的事件
/**
遮罩背景响应事件
*/
func bgViewTapped() {
self.dismiss()
}
/**
取消按钮响应事件
*/
func cancelBtnClicked() {
self.dismiss()
}
现在来撸一下，这个移除视图的操作是这么玩的
private func dismiss(){
UIView.animateWithDuration(0.3, animations: {
self.bgView.alpha = 0.0
self.contentView.frame = CGRectMake(0, CGRectGetHeight(self.frame), CGRectGetWidth(self.frame), self.contentHeight)
}) { (finished) in
self.removeFromSuperview()
}
}
还有就是点击分享按钮要实现跳转APP分享的功能了，差点忘了自己在干啥，要不还是直接看代码吧
/**
分享按钮响应事件
*/
func shareButtonClicked(sender:UIButton) {
let snsTypes:Array<AnyObject>!
var currentShareType:String!
if sender.tag == 100 {
snsTypes = [UMShareToWechatSession]
currentShareType = "1"
UMSocialData.defaultData().extConfig.wechatSessionData.title = self.shareTitle
UMSocialData.defaultData().extConfig.wechatSessionData.url = self.shareUrl
}else if sender.tag == 100 + 1 {
snsTypes = [UMShareToWechatTimeline]
currentShareType = "0"
if self.shareTitle != nil && self.shareTitle.characters.count > 0 {
UMSocialData.defaultData().extConfig.wechatTimelineData.title = self.shareTitle
}else{
UMSocialData.defaultData().extConfig.wechatTimelineData.title = self.shareContent
}
}else if sender.tag == 100 + 2 {
snsTypes = [UMShareToSina]
currentShareType = "2"
self.shareContent = self.shareUrl + self.shareContent
guard self.shareTitle.characters.count > 0 else{
UMSocialData.defaultData().extConfig.qzoneData.title = " "
return
}
UMSocialData.defaultData().extConfig.qzoneData.title = self.shareTitle
UMSocialData.defaultData().extConfig.qzoneData.url = self.shareUrl
}else if sender.tag == 100 + 3 {
snsTypes = [UMShareToQQ]
currentShareType = "4"
guard self.shareTitle.characters.count > 0 else{
UMSocialData.defaultData().extConfig.qqData.title = " "
return
}
UMSocialData.defaultData().extConfig.qqData.title = self.shareTitle
UMSocialData.defaultData().extConfig.qqData.url = self.shareUrl
}else if sender.tag == 100 + 4 {
snsTypes = [UMShareToQzone]
currentShareType = "3"
guard self.shareTitle.characters.count > 0 else{
UMSocialData.defaultData().extConfig.qzoneData.title = " "
return
}
UMSocialData.defaultData().extConfig.qzoneData.title = self.shareTitle
UMSocialData.defaultData().extConfig.qzoneData.url = self.shareUrl
}else{
snsTypes = []
currentShareType = " "
}
UMSocialDataService.defaultDataService().postSNSWithTypes(snsTypes, content: self.shareContent, image: self.shareImage, location: nil, urlResource: UMSocialUrlResource.init(snsResourceType: UMSocialUrlResourceTypeDefault, url: self.shareUrl), presentedController: self.rootVC) { (shareResponse) in
if shareResponse.responseCode == UMSResponseCodeSuccess {
print("分享成功")
dispatch_async(dispatch_get_main_queue(), {
})
}
}
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(0.3)), dispatch_get_main_queue(), {
self.dismiss()
})
}
基本实现的代码就是这些，下面我们要把它这个ShareView加在ViewController上来显示出来
首先定义一个方法
private func showInView(parentView:UIView) {
parentView.addSubview(self)
UIView.animateWithDuration(0.3) {
self.bgView.alpha = 0.4
self.contentView.frame = CGRectMake(0, CGRectGetHeight(self.frame) - self.contentHeight, CGRectGetWidth(self.frame), self.contentHeight)
}
}
然后在外面调用下面这个方法来把视图添加上去
func showInViewController(viewController:UIViewController){
self.rootVC = viewController
self.showInView(viewController.view)
}
主要方法就是这些，下面我贴出来别的辅助方法：
//根据意思，我们知道这个方法是根据传入的个人，来判断需要几页显示的
//打比方，我要分享的平台只有三个(QQ,微信,微博),那我一页就能显示完，返回的值就是1,表示一页
private func pageNum(num:Int) -> Int {
return (num % 4 == 0 ? 0 : 1) + num / 4
}
//MARK: - UIScrollViewDelegate
func scrollViewDidScroll(scrollView: UIScrollView) {
let pageWidth = CGRectGetWidth(self.bounds)
let pageFraction = self.scrollView.contentOffset.x / pageWidth
self.pageControl.currentPage = Int(pageFraction)
}
然后，下面就是最最重要的方法调用了，本来以为写完了，要关电脑睡觉了-_-!!
let shareView = ShareView.init(frame: CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT))
shareView.setShareModel("我是分享的主要内容，我先强调一下，这里我最帅", image: UIImage(named: "share_logo")!, url: "http://www.wufeiyue.com", title: "我是标题，URL是对的")
//你可以这样用:
shareView.showInViewController(self.navigationController)
//你也可以这样用：
let tabBarVC = appDelegate.window?.rootViewController
shareView.showInViewController(tabBarVC!)
//你同样可以这样用：
shareView.showInViewController(SharedApp.tabbarController)
//这么多种选择，总有一样适合你，选其一
下面是demo地址
https://github.com/eppeo/ShareViewTest
