摘要: NSArray *array = [NSArray arrayWithObjects:@"2.0", @"2.3", @"3.0", @"4.0", @"10", nil]; CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] f... 阅读全文
posted @ 2016-01-19 20:40 言五六 阅读(452) 评论(0) 推荐(0) 编辑