我尝试在苹果公司的新版Swift语言中将数组类型对象推送到数组中的特定索引。它应该看起来像这样= [ [...], [...], ...]
,根据文档所述-如果是var
,则NSMutableArray
类型会自动分配给变量,但即使在playground中也会抛出错误:
var arr = [];
arr[0] = []; // Error: cannot assign to result of this expression
arr.insert([], atIndex:0) // Error: 'NSArray' does not have member named 'insert'