Question

我有一个包含字典数组的plist。

每个字典都有几列。

我想访问字典wito for loop的每个数据。

var qplist = NSArray(contentsOfFile: path)
// qplist  is array of dictionary

 for meta in qplist! { //Type 'Any' does not conform to protocol 'Sequence'
     //meta['test']
 }

如何循环字典数组？

我想这样的东西,,,,但它不起作用。

for var meta:Dictionary in qplist! {

Answer 1

尝试这样。

if let qplist = NSArray(contentsOfFile: path),
   let array = qplist.objectEnumerator().allObjects as? [[String:Any]] {   
    for dictionary in array { 
        print(dictionary["test"])
    }
}

Answer 2

您需要这样做：

declare @cols1 varchar(max)
declare @cols2 varchar(max)
declare @query nvarchar(max)

--Row Numbers with tally
;with c1 as (
select * from ( values  (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) v(n) )
,c2 as (select n1.* from c1 n1, c1 n2, c1 n3, c1 n4) 
,RowNumbers as ( 
select top (select max(cnt) from (select cnt = count(*) from Categories group by pid ) a) convert(varchar(6), row_number() over (order by (select null))) as RowN 
from c2 n1, c2 n2
)
select  @cols1 = stuff((select ','+QuoteName(RowN) from RowNumbers group by RowN for xml path('')),1,1,''),
        @cols2 = stuff((select ',' + QuoteName(RowN) + ' as '+ QuoteName(concat('Category' , RowN)) from RowNumbers group by RowN for xml path('')),1,1,'')

select @cols1, @cols2

Set @query = ' Select Pid, '+ @cols2 +' from ( '
Set @query += '     select *, RowN = row_number() over(partition by pid order by Category) from Categories) a '
Set @query += ' pivot (max(category) for RowN in (' + @cols1 + ')) p'

--select @query
exec sp_executesql @query

对于字典的循环数组

2 个答案: