为什么我得到此NSDate的空值？

Question

I am getting a NSDictionary back form a web service that looks like this when logged: 我从网络服务获得NSDictionary的登录信息，如下所示：

NSLog(@"dictionary: %@", dictionary);

Gives me: 给我：

dictionary: {
    BackOrderDate = "1/1/0001 12:00:00 AM";
    Quantity = 15;
}

So then I try and get a date from that: 因此，我尝试从中获取日期：

NSDateFormatter *df = [[NSDateFormatter alloc] init];
NSDate *date = [df dateFromString: [dictionary objectForKey:@"BackOrderDate"]];

Logging this gives me a (null) but I know my dictionary has a value: 记录这个给我一个（空），但是我知道我的字典有一个值：

NSLog(@"setting back order date:%@ %@",date, [dictionary objectForKey:@"BackOrderDate"]);

Gives me: 给我：

setting back order date:(null) 3/1/2012 12:00:00 AM

Spending WAY to much time on this - what am I missing???? 在这方面花很多时间-我想念什么？？？？

Answer 1

我想你错过了

[df setDateFormat:@"dd/MM/yyyy HH:mm:ss aaa"];