Swift中异常处理 —— try

let string = "{\"name\":\"hehe\"}"
let data = string.data(using: .utf8)
        
//方法一：推荐使用 try?，如果解析成功，就有值；解析失败，返回nil
let json = try? JSONSerialization.jsonObject(with: data!, options: [])
        
//方法二：不建议使用 try!，如果解析失败，会崩溃
let json = try! JSONSerialization.jsonObject(with: data!, options: [])
        
//方法三：do catch 手动捕获异常
do {
    let json = try JSONSerialization.jsonObject(with:data!, options: [])
} catch  {
    //输出错误信息
    print(error)
}