2016-11-01T00:00:00+08:00转换为2016-11-01 00:00:00

主要是这个yyyy-MM-dd'T'HH:mm:ssZZZZ，要正确匹配时间格式

下面是代码：

+(NSString *) timeChange:(NSString *)timeString

{

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZ"];

NSDate *currentDate = [dateFormatter dateFromString:timeString];

NSDateFormatter *outputFormatter = [[NSDateFormatter alloc]init];

[outputFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSString *timeChanged = [outputFormatter stringFromDate:currentDate];

NSLog(@"datestr = %@", timeChanged);

return timeChanged;

}