在 objective c 中按日期月份和年份对日期数组进行排序

Question

我想用日期对数组进行排序，但日期只按日期和月份排序，而不按年份排序我的代码:

NSArray *sortedArray = [arrClassSehedule sortedArrayUsingComparator:^NSComparisonResult(NSDictionary *obj1, NSDictionary *obj2) {
    NSDate *d1 = [appSharedData.CommanFormatForConditional dateFromString: [obj1 objectForKey:@"scheduleStart"]];
    NSDate *d2 = [appSharedData.CommanFormatForConditional dateFromString: [obj1 objectForKey:@"scheduleStart"]];
    return [d1 compare: d2];
}];

它没有按日期正确排序。

Answer 1

问题是 d1 您正在使用 obj1，而 d2 您也使用 obj1。所以只是 Lal Krishna 写的一个错字。这是固定版本：

NSArray *sortedArray = [arrClassSehedule sortedArrayUsingComparator:^NSComparisonResult(NSDictionary *obj1, NSDictionary *obj2) {
    NSDate *d1 = [appSharedData.CommanFormatForConditional dateFromString:[obj1 objectForKey:@"scheduleStart"]];
    NSDate *d2 = [appSharedData.CommanFormatForConditional dateFromString:[obj2 objectForKey:@"scheduleStart"]];
    return [d1 compare:d2];
}];

Answer 2

好像打错了。

请将代码替换为

 NSDate *d2 = [appSharedData.CommanFormatForConditional dateFromString: [obj2 objectForKey:@"scheduleStart"]];

在 objective c 中按日期月份和年份对日期数组进行排序

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