'NSString的！' 不能转换为'String'; 您是要使用“ as！”吗？ 强迫垂头丧气？
[英]'NSString!' is not convertible to 'String'; did you mean to use 'as!' to force downcast?
问题描述
Code: 
码：
var strCategIds = ""
for(var i = 0; i < arrCateName.count; i++){
var prCate:PropCategory = arrCateName.objectAtIndex(i) as! PropCategory
if(prCate.bSelected == true){
strCategIds = strCategIds + prCate.strCategoryId as! String!
}
}
What is this error meaning?I have spent lot of time on it.but no success.any help will be appreciated.thanks in advance 这个错误是什么意思？我花了很多时间在上面，但没有成功，任何帮助将不胜感激。
1 个解决方案
解决方案1
5 已采纳 2015-03-05 14:24:34
strCategIds + prCate.strCategoryId as! String!
is compiled as 被编译为
(strCategIds + prCate.strCategoryId) as! String!
Instead, I think you should: 相反，我认为您应该：
strCategIds + (prCate.strCategoryId as! String)
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