领域抛catch Swift 2.0

Question

没有人知道下面的领域功能的try-catch语法是？

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

，我发现了以下错误：

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

Answer 1

从我想象realm.write（）可以抛出异常。在Swift 2中，你用do/catch处理异常并尝试。

我怀疑你应该做这样的事情：

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

如果realm.write（）抛出一个异常，print语句将被立即调用。

Answer 2

您也可以尝试

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

Answer 3

它看起来像一个NSError被抛出。见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 
}