1. 1. 取得当前系统时间戳
   
2. 
   
3. long long timestamp = [[[[NSDate alloc] init] autorelease] timeIntervalSince1970];
   
4. NSLog(@"t:%qi", timestamp);
   
5. 
   
6. 2. 根据具体的时间，取得其时间戳
   
7. 
   
8. NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
   
9. [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
   
10. NSDate *date =[dateFormatter dateFromString:@"2014-12-01 10:11:54"];
    
11.    

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1. 1. 取得当前系统时间戳
   
2. 
   
3. long long timestamp = [[[[NSDate alloc] init] autorelease] timeIntervalSince1970];
   
4. NSLog(@"t:%qi", timestamp);
   
5. 
   
6. 2. 根据具体的时间，取得其时间戳
   
7. 
   
8. NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
   
9. [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
   
10. NSDate *date =[dateFormatter dateFromString:@"2014-12-01 10:11:54"];
    
11.    

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