領域拋catch Swift 2.0

Question

沒有人知道下面的領域功能的try-catch語法是？

realm.write() { 
    realm.add(whatever) 
} 

，我發現了以下錯誤：

call can throw but it is not marked with 'try' and the error is not handled

Answer 1

從我想象realm.write（）可以拋出異常。在Swift 2中，你用do/catch處理異常並嘗試。

我懷疑你應該做這樣的事情：

do { 
    try realm.write() { 
     realm.add(whatever) 
    } 
} catch { 
    print("Something went wrong!") 
} 

如果realm.write（）拋出一個異常，print語句將被立即調用。

Answer 2

您也可以嘗試

try! realm.write { 
    realm.add(whatever) 
} 

Answer 3

它看起來像一個NSError被拋出。見Swift 2.0 source

添加到@ tgebarowski的回答是：

do { 
    try self.realm.write { 
     realm.add(whatever) 
    } 
} catch let error as NSError { 
    print("Something went wrong!") 
    // use the error object such as error.localizedDescription 
}