阅读背景:

将NSArrayController中项的属性的聚合设置为从属键

来源:互联网 

Lets say I have an NSArrayController which contains items each with netCost and netProfit properties and I want to create a Total Percent Profit label (containing the sum of the profits divided by the sum of the costs).Lets say I have an NSArrayController which cont




你的当前访问异常,请进行认证后继续阅读剩余内容。

分享到: