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我想乘以一个乘数的文本字段,但我不断收到下面的错误。谁能帮忙?使用Swift。乘以文本字段错误?
Binary operator '*' cannot be applied to operands of type 'Int?' and 'Double'
var Number1 = Int(weight.text!)
let lidocainemult = (1.5)
var lidoresult = Number1 * lidocainemult
lidocaine.text = NSString(format:"%d",lidoresult)as String;
您试图乘以可选整数和双精度。 –