NSIndexPath中是否存在节

Question

如何检查NSIndexPath对象的集合是否在特定部分中有项？我不关心这一行，如果有特定部分的项目，我想知道是/否。

按原样，我已根据程序中的行数静态写出，例如，有3行的0部分如下所示：

if ([array containsObject:[NSIndexPath indexPathForItem:0 inSection:0]] || [array containsObject:[NSIndexPath indexPathForItem:1 inSection:0]] || [array containsObject:[NSIndexPath indexPathForItem:2 inSection:0]]) 

Answer 1

假设array包含NSIndexPath个对象数组：

NSInteger someSection = ... // the section to check for
BOOL exists = NO;
for (NSIndexPath *path in array) {
    if (path.section == someSection) {
        exists = YES;
        break;
    }
}

if (exists) {
    // Yes, at least one of the index paths was for the desired section
}