如何判断是否存在此问题？:
[[dataArray objectAtIndex:indexPathSet.row] valueForKey:@"SetEntries"]
我想知道这把 keys 是否存在.我怎么才能做到这一点呢？
非常感谢您:)
EDIT: dataArray has Objects in it. And these objects are NSDictionaries.
如何判断是否存在此问题？:
[[dataArray objectAtIndex:indexPathSet.row] valueForKey:@"SetEntries"]
我想知道这把 keys 是否存在.我怎么才能做到这一点呢？
非常感谢您:)
EDIT: dataArray has Objects in it. And these objects are NSDictionaries.
我假设[dataArray objectAtIndex:indexPathSet.row]返回NSDictionary，在这种情况下，您可以简单地判断valueForKey与nil.的结果
例如:
if ([[dataArray objectAtIndex:indexPathSet.row] valueForKey:@"SetEntries"] != nil) {
// The key existed...
}
else {
// No joy...
}