istudy学生端项目的总结(二)

当有navigationBar的时候不设置向下移动64个单位 textView和tableView都是scrollView，因此当有navigationBar的时候都会自动的往下移
因此可以用这两句话 其中一种方法来解决
不设置自动往下移，本来默认是true

self.automaticallyAdjustsScrollViewInsets = false

还有一种是跟新tableView的subView 因为tableView的subView是scrollView

override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
self.tableView?.contentInset = UIEdgeInsetsZero
self.tableView?.scrollIndicatorInsets = UIEdgeInsetsZero
}

设置隐藏自己的tabBar

self.tabBarController?.tabBar.hidden = true

当向服务器传图片时，一种是传url，还有一种是传base64的字符串，需将图片变成base64的字符串

//每张图片转化成base64的字符串
func imageToBae64(image:UIImage) -> String{
let data = UIImageJPEGRepresentation(image, 0.5)
let encodeString = data?.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)
return encodeString!
}

将系统里面选择的相册转化成为image

//当选择好相册后
func photoPicker(picker: AJPhotoPickerViewController!, didSelectAssets assets: [AnyObject]!) {
for i in 0 ..< assets.count {
let asset = assets[i]
let tempImage = UIImage(CGImage: asset.defaultRepresentation().fullScreenImage().takeUnretainedValue())
self.photos.addObject(tempImage)
}
picker.dismissViewControllerAnimated(true, completion: nil)

self.collectionView?.reloadData()
}

将图片的base64字符串组装成html的格式

//转换成base64字符串
for i in 0 ..< self.photos.count{
let widthAndHeight = " width = " + "\(50)" + " height = " + "\(50)"
let base64String = imageToBae64(self.photos[i] as! UIImage)
let imgHtml = "<img"  + widthAndHeight +  " src = " + "\"" +  "data:image/jpg;base64," + base64String +  "\"" + "/>"

content += imgHtml

}

类似QQ的分组表

只要在每个tablView的sectonView中添加一个按钮 随后用一个是非值进行保存即可

//实现sectionView的视图
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let view = UIView(frame: CGRectMake(0,0,SCREEN_WIDTH,30))
view.backgroundColor = UIColor.whiteColor()

//组的名称 还有箭头图片 记录人数
let tempArray = self.items[section].valueForKey("ContacterList") as! NSArray

let groupNameLabel = UILabel(frame: CGRectMake(40,0,SCREEN_WIDTH - 40,30))
groupNameLabel.text = (self.items[section].valueForKey("Label") as? String)! + "(" + "\(tempArray.count)" + "人)"
//箭头的视图

let imageView = UIImageView(frame: CGRectMake(0, 0, 40, 30))
if(self.selectArr[section] as! NSObject == 1){
imageView.image = UIImage(named: "选择信件")
}else{
imageView.image = UIImage(named: "未选择信件")
}

let btn = UIButton(frame: CGRectMake(0,0,SCREEN_WIDTH,50))

btn.tag = section
btn.addTarget(self, action: #selector(ContactPersonViewController.btnOpenList(_:)), forControlEvents: .TouchUpInside)
view.addSubview(btn)
view.addSubview(imageView)
view.addSubview(groupNameLabel)
view.bringSubviewToFront(btn)
view.autoresizingMask = .FlexibleWidth
return view
}

点击按钮的事件

func btnOpenList(sender:UIButton){
if(self.selectArr[sender.tag] as! NSObject == 0){
self.selectArr[sender.tag] = 1
}else{
self.selectArr[sender.tag] = 0
}
self.contactPersonTableView?.reloadData()
}

随后跟新视图的时候跟新每个section的row的行数

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//每一组究竟有几个列表
if(self.selectArr[section] as! NSObject == 1){
self.contacterlistArray = self.items[section].valueForKey("ContacterList") as! NSArray
return self.contacterlistArray.count
}else{
return 0
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//首先赋值每个组的联系人表
self.contacterlistArray = self.items[indexPath.section].valueForKey("ContacterList") as! NSArray
let cell = tableView.dequeueReusableCellWithIdentifier("ContactPersonTableViewCell")
as! ContactPersonTableViewCell
//先不赋值
if(self.selectArr[indexPath.section] as! NSObject == 1){
cell.teacherHeadImageView?.image = UIImage(named: "教师头像")
cell.teacherNameLabel?.text = self.contacterlistArray[indexPath.row].valueForKey("Name") as? String
cell.selectedBtn?.addTarget(self, action: #selector(ContactPersonViewController.selectPerson(_:)), forControlEvents: .TouchUpInside)
cell.id = self.contacterlistArray[indexPath.row].valueForKey("Id") as! NSInteger
cell.isSelect = false
//自定义btn的tag
cell.selectedBtn?.setImage(UIImage(named: "未选择信件" ), forState: .Normal)
cell.selectedBtn!.customTag = "\(indexPath.section)" + "-" + "\(indexPath.row)"
for i in 0 ..< self.selectedPersonIdArray.count{
if(self.selectedPersonIdArray[i] as! NSInteger == cell.id){
cell.isSelect = true
cell.selectedBtn?.setImage(UIImage(named: "选择信件" ), forState: .Normal)
}
}

cell.selectionStyle = .None
}
return cell
}

因为每个indexPath的row都一样 所以要自定义button 改变他的tag即可

import UIKit

class CustomContactSelectBtn: UIButton {

//自定义tag
var customTag = ""

}

当有doc,ppt等文件类型的时候 一种选择是打开safari浏览器，但是用户体验不好，还有一种是用PreviewController

继承协议

QLPreviewControllerDataSource

var fileUrl = NSURL()

用Url 进行预览

随后点击的时候进行预览即可

func previewController(controller: QLPreviewController, previewItemAtIndex index: Int) -> QLPreviewItem {
return self.fileUrl
}

字符串的分割 后台返回来的时间类型是yyyyMMddhhmmss类型的 因此需要进行分割 分割必须是NSString类型的

定义其实位置 和长度

let yearRange = NSMakeRange(0, 4)
let monthRange = NSMakeRange(4, 2)
let dateRange = NSMakeRange(6, 2)
let hourRange = NSMakeRange(8, 2)
let minuateRange = NSMakeRange(10, 2)
let secondRange = NSMakeRange(12, 2)

进行切割

tempStartDate = items[indexPath.row].valueForKey("datestart") as! NSString

date += "开始时间:" + tempStartDate.substringWithRange(yearRange) + "-" + tempStartDate.substringWithRange(monthRange) + "-" + tempStartDate.substringWithRange(dateRange) + " " + tempStartDate.substringWithRange(hourRange) + ":" + tempStartDate.substringWithRange(minuateRange) + ":" + tempStartDate.substringWithRange(secondRange) + "\n"

将截止时间得到的字符串转化为date类型 随后与现在的时间进行比较，要注意日期的格式 第一个是晚于现在的日期 第二个是早于现在的日期

//string转化为date
if(jsonDateString != ""){
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let jsonDate = formatter.dateFromString(jsonDateString)
let currentDate = NSDate()
cell.endDate  = jsonDate!
//进行比较
let result:NSComparisonResult = currentDate.compare(jsonDate!)
if result == .OrderedAscending{
cell.answerQusBtn?.setTitle("答题", forState: .Normal)

}else{
cell.answerQusBtn?.setTitle("查看", forState: .Normal)
if(!self.isExercise){
cell.Score?.text = "成绩:" + score
}
}

tableView顶部加一个搜索条 首先继承协议

UISearchResultsUpdating,UISearchControllerDelegate

定义搜索条

var sc:UISearchController!

sc = UISearchController(searchResultsController: nil)

sc.searchResultsUpdater = self
sc.dimsBackgroundDuringPresentation = false
sc.hidesNavigationBarDuringPresentation = true
sc.searchBar.placeholder = "请输入试卷名称"
sc.searchBar.searchBarStyle = .Minimal
sc.searchBar.sizeToFit()
self.tableView?.tableHeaderView = sc.searchBar
sc.delegate = self

当有搜索条的时候sc为活跃状态 否则为沉寂状态 根据这个的不同 来改变tableView中显示的值

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if(sc?.active == false) {
return self.items.count
}else{
return filterItems.count
}
}

当搜索条中有文字输入时，跟新视图 实际就是创建一个数组 随后进行谓词匹配来添加新的数组的值，随后视图中来展现新的匹配后的东西

func updateSearchResultsForSearchController(searchController: UISearchController) {
self.filterItems.removeAllObjects()
let scopePredicate = NSPredicate(format: "SELF contains[c] %@", searchController.searchBar.text!)
for i in 0 ..< self.items.count{
if(scopePredicate.evaluateWithObject(self.items[i].valueForKey("title")) == true){
self.filterItems.addObject(self.items[i])
}
}

self.tableView?.reloadData()
}
func willPresentSearchController(searchController: UISearchController) {
self.tableView?.mj_header.hidden = true
}
func willDismissSearchController(searchController: UISearchController) {
self.tableView?.mj_header.hidden = false
}

当点击背景的时候 来使搜索条拿掉

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.sc.active = false
self.sc.searchBar.text = ""
sc.dismissViewControllerAnimated(true, completion: nil)
}

当这个页面完全拿出时，调用析构函数时，搜索条移除

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.sc.active = false
self.sc.searchBar.text = ""
sc.dismissViewControllerAnimated(true, completion: nil)
}

回退回上一个viewController 在navigation的栈里面 进行遍历

f(sender.tag == 1) {
let vc = UIStoryboard(name: "OneCourse", bundle: nil).instantiateViewControllerWithIdentifier("MyHomeWorkVC") as! MyHomeWorkViewController

for temp in (self.navigationController?.viewControllers)!{
if(temp .isKindOfClass(vc.classForCoder)){
self.navigationController?.popToViewController(temp, animated: true)
}
}

但是若是改变vc的值，是不会有任何作用的 这种遍历情况下的回退 注意

点击webView随后进行图片的放大
获取到图片的url

func webViewShowBig(sender:UITapGestureRecognizer){
var pt = CGPoint()
var urlToSave = ""
if(sender.view?.tag == 1){
pt = sender.locationInView(self.answerWebView)
let imgUrl = String(format: "document.elementFromPoint(%f, %f).src",pt.x, pt.y);
urlToSave = self.answerWebView.stringByEvaluatingJavaScriptFromString(imgUrl)!
}else{

图片放大的手势识别，手势也要有delegate随后进行识别，是点击在要放大的那个webView上

//图片放大时候的动作
func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {

return true

}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
if(gestureRecognizer == self.tap){
return true
}else{
return false
}
}

随后将url转化成data，在转化成url 传到放大的视图里

let image = UIImage(data: data!)
let previewPhotoVC = UIStoryboard(name: "Problem", bundle: nil).instantiateViewControllerWithIdentifier("previewPhotoVC") as! previewPhotoViewController
previewPhotoVC.toShowBigImageArray = [image!]
previewPhotoVC.contentOffsetX = 0
self.navigationController?.pushViewController(previewPhotoVC, animated: true)
}

webView加载好自动适应高度 不让他滚动 继承协议

UIWebViewDelegate

self.qusDes.delegate = self

随后在webViewdidStart里面初始化webView的长宽，因为若加载新的html文档，的话，他会保留上次加载的长宽，因此要初始化

让webView自动适应宽度

func webViewDidStartLoad(webView: UIWebView) {
webView.frame = CGRectMake(0, 0, SCREEN_WIDTH, 1)
}
var resetBtnAndQusHeight:CGFloat = 0.0
func webViewDidFinishLoad(webView: UIWebView) {
let height = NSInteger(webView.stringByEvaluatingJavaScriptFromString("document.body.offsetHeight")!)

var NewFrame = webView.frame
NewFrame.size.height = CGFloat(height!) + 5
webView.frame = NewFrame
let scrollView = webView.subviews[0] as! UIScrollView
scrollView.showsVerticalScrollIndicator = false
let width = NSInteger(webView.stringByEvaluatingJavaScriptFromString("document.body.scrollWidth")!)
scrollView.contentSize = CGSizeMake(CGFloat(width!), 0)

当有一个view时，要加阴影的偏移效果时

//顶部加条线
//设置阴影效果
self.topView?.layer.shadowOffset = CGSizeMake(2.0, 1.0)
self.topView?.layer.shadowColor = UIColor.blueColor().CGColor
self.topView?.layer.shadowOpacity = 0.5

注意collectionView是要有资源的 没有资源，异步从后台获取的话，就会崩溃

这里题目 例如选择题，填空题等都是用tableView来实现的 header加载题目描述，随后每个cell加载选项或者空格 选项时有可能会有图片，因此要自适应图片的高度 因此只要在cell的方法中代理webView的delegate 随后等Html加载好以后发送通知到viewController，随后每个cell的高度用一个数组保存，初始化，当通知拿来的时候 要进行判断 自己的数组中的值和发来的这个通知是否一样 若不一样 进行改变即可 刷新tableView 注意在这里实现cell的方法中，不是重用cell，而是每次初始化一个Cell,这也是一个bug吧，随后在cell中也是用代码的方式添加控件，而不是用拖拽的方式

<pre name="code" class="plain">    NSNotificationCenter.defaultCenter().postNotificationName("ChoiceWebViewHeight", object: self, userInfo: nil)

//注册通知
NSNotificationCenter.defaultCenter().addObserver(self, selector:#selector(ChoiceQusViewController.reloadCellHeight(_:)), name: "ChoiceWebViewHeight", object: nil)

随后改变cell的高度即可

func reloadCellHeight(sender:NSNotification){
let cell = sender.object as! ChoiceTableViewCell
if(self.cellHeight[cell.Custag] as! CGFloat != cell.cellHeight){
self.cellHeight.replaceObjectAtIndex(cell.Custag, withObject: cell.cellHeight)
self.tableView?.reloadData()
}

}

设置btn的下划线 用富文本的方式

let str1 = NSMutableAttributedString(string: (self.forgetPasswordBtn?.titleLabel?.text)!)
let range1 = NSRange(location: 0, length: str1.length)
let number = NSNumber(integer: NSUnderlineStyle.StyleSingle.rawValue)
str1.addAttribute(NSUnderlineStyleAttributeName, value: number, range: range1)
str1.addAttribute(NSForegroundColorAttributeName, value: UIColor.blueColor(), range: range1)
self.forgetPasswordBtn?.setAttributedTitle(str1, forState: .Normal)

随后设置键盘的时候，最好是设置约束中的layout的值，最好不要设置frame的值 有时会失效

设置label或texTView的字体的颜色时，首先有值，在设置颜色

self.displayMarkingTextView?.text = totalString
self.displayMarkingTextView?.textColor = UIColor.redColor()

将点击事件传到下一个view中去 可以首先自定义一个view

class mainTableView: UITableView {
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect) {
// Drawing code
}
*/
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.nextResponder()?.touchesBegan(touches, withEvent: event)
}
}

随后用到的tableView 用这个自定义的即可

@IBOutlet weak var courseDesTableView:mainTableView?

随后的点击事件

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.sc.active = false
self.sc.searchBar.text = ""
self.tabBarController?.tabBar.hidden = false

}

差不多现在是这样，愿项目赶紧上线吧

Alamofire来进行上传文件

Alamofire.upload(.POST, string, multipartFormData: { (formData) in
formData.appendBodyPart(data: self.selectedImageData, name: "name", fileName: "head.jpg", mimeType: "image/jpeg")
}) { (encodingResult) in
switch encodingResult {
case .Success(let upload, _, _):
//         print((upload.request?.allHTTPHeaderFields))
upload.responseJSON(completionHandler: { (response) in
switch response.result{
case .Success(let Value):
let json = JSON(Value)
userDefault.setValue(json["info"]["uploadedurl"].string, forKey: "avtarurl")
self.save()
case .Failure(_):
print(2)
ProgressHUD.showError("保存失败")
}
})
case .Failure(_):
ProgressHUD.showError("保存失败")
print(3)
}
}

selectedImageData是自己的图片的二进制文件 将图片进行命名随后上传 定义类型为jpg 随后上传即可