iOS-搜索实验错误的地方-红色部分

经验教训：很多代码没有必要手动敲，知道逻辑，复制也可以。

代码一定要规范，层次要分明。

import UIKit

class ViewController: UITableViewController,UISearchBarDelegate{
   
    //这一段没有问题
    @IBOutlet weak var searchtext: UISearchBar!
    var pathdata:NSArray!
    var pathfliterdata:NSMutableArray!
   
    //这一段没有问题
    override func viewDidLoad(){
        super.viewDidLoad()
       
        self.searchtext.delegate = self
        self.searchtext.showsScopeBar = false
        self.searchtext.sizeToFit()
        let plistpath = NSBundle.mainBundle().pathForResource("team", ofType: "plist")
        self.pathdata = NSArray(contentsOfFile: plistpath!)
        self.filtercontentforsearchtext("", scope:-1)
    }
   
   
   
    func filtercontentforsearchtext(searchText:NSString,scope:Int){
        if(searchText.length == 0){
            self.pathfliterdata = NSMutableArray(array: self.pathdata)
            return
        }
       
        var tempArray :NSArray!
       
        if(scope == 1){ //中文 name字段是中文名
            let scopepredicate = NSPredicate(format: "SELF.name contains[c] %@",searchText)
            tempArray = self.pathdata.filteredArrayUsingPredicate(scopepredicate!)
            self.pathfliterdata = NSMutableArray(array: tempArray)
        }
        else if(scope == 0){ //英文 image字段保存英文名
            let scopepredicate = NSPredicate(format: "SELF.image contains[c] %@",searchText)
            tempArray = self.pathdata.filteredArrayUsingPredicate(scopepredicate!)
            self.pathfliterdata = NSMutableArray(array: tempArray)
        }else {                //查询所有
            self.pathfliterdata = NSMutableArray(array: self.pathdata)
        }
    }
   
   
   
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
   
   
   
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.pathfliterdata.count
    }
   
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
       
        let cellIdentifier = "cellidentifier"
       
        var cell:UITableViewCell! = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath:indexPath) as? UITableViewCell
       
        let row = indexPath.row
        let rowDict = self.self.pathfliterdata[row] as NSDictionary
       
        cell.textLabel?.text = rowDict["name"] as? String
        let imagePath = NSString(format: "%@.png", rowDict["image"] as String)
        cell.imageView?.image = UIImage(named: imagePath)
       
       
       
        return cell
    }
    
    
    /// 实现 UISearchBarDelegate 协议方法
    //  获得焦点，成为第一响应者
    func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
        self.searchtext.showsScopeBar = true
        self.searchtext.sizeToFit()
        return true
    }
   
    //点击键盘上的搜索按钮
    func searchBarSearchButtonClicked(searchBar: UISearchBar) {
        self.searchtext.showsScopeBar = false
        self.searchtext.resignFirstResponder()
        self.searchtext.sizeToFit()
    }
    //点击搜索栏取消按钮
    func searchBarCancelButtonClicked(searchBar : UISearchBar) {
        //查询所有
        self.filtercontentforsearchtext("", scope:-1)
        self.searchtext.showsScopeBar = false
        self.searchtext.resignFirstResponder()
        self.searchtext.sizeToFit()
    }
   
    //当文本内容发生改变时候调用
    func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
        self.filtercontentforsearchtext(searchText, scope:self.searchtext.selectedScopeButtonIndex)
        self.tableView.reloadData()
    }
   
    //当搜索范围选择发生变化时候调用
    func searchBar(searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {
        self.filtercontentforsearchtext(self.searchtext.text, scope:selectedScope)
        self.tableView.reloadData()
    }
}