ios - UITableView 冻结直到循环完成

问题描述

我正在使用此代码在Database表格中搜索文本：

func runSearch(_ pattern: String) {
    for book in selectedBooks {
        let path = Bundle.main.path(forResource: "library", ofType: "sqlite")!
        let sqlState = "select * from \(book.name)"
        
        guard
            let db = FMDatabase(path: path), db.open(),
            let result = db.executeQuery(sqlState, withArgumentsIn: [])
        else { return }
        
        while result.next() {
            RunLoop.current.run(mode: .default, before: .distantPast)
            
            let pageID = result.long(forColumn: "Id")
            let pageText = result.string(forColumn: "page_text") ?? ""
            
            if isMatches(regex: pattern, in: pageText) {
                dataSource.append(dbItem(id: pageID, text: pageText))
                resultsLabel.text = "Results count: " + dataSource.count.description

                let indexPath = IndexPath(row: dataSource.count - 1, section: 0)
                tableView.insertRows(at: [indexPath], with: .automatic)
            }
        }
    }
    
}


func isMatches(regex: String, in str: String) -> Bool {
    do {
        let regex = try NSRegularExpression(pattern: regex)
        let matches = regex.matches(in: str, range: NSRange(location: 0, length: str.count))
        return matches.count != 0
        
    } catch {
        print("Something went wrong! Error: \(error.localizedDescription)")
    }
    return false
}

我有 40 多本书要搜索。并且搜索完成得很好，但是“UITableView”会冻结，直到搜索完成。我想让用户滚动浏览这个表格并选择他想要在搜索时显示的结果。

有人可以帮我解决这个问题吗？

标签： iosswiftuitableview

ios - UITableView 冻结直到循环完成

问题描述

解决方案

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