【代码笔记】两个时间字符串的比较

一，效果图。

二，代码。

- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view.
 [self initTimerCompare]; } #pragma -mark -functions
//比较时间
-(void)initTimerCompare { NSString *starTimer=@"2014-08-29"; NSString *finishTimer=@"2014-09-30"; BOOL result = [starTimer compare:finishTimer] == NSOrderedSame; NSLog(@"result:%d",result); if (result==1) { UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:@"开始时间和结束时间相等" delegate:self cancelButtonTitle:@"知道了" otherButtonTitles:nil, nil]; [alert show]; return; } BOOL result1 = [starTimer compare:finishTimer]==NSOrderedDescending; NSLog(@"result1:%d",result1); if (result1==1) { UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:@"开始时间晚于结束时间" delegate:self cancelButtonTitle:@"知道了" otherButtonTitles:nil, nil]; [alert show]; return; } BOOL result2 = [starTimer compare:finishTimer]==NSOrderedAscending; NSLog(@"result2:%d",result1); if (result2==1) { UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:@"开始时间早于结束时间" delegate:self cancelButtonTitle:@"知道了" otherButtonTitles:nil, nil]; [alert show]; return; } }