背景：之前写过一篇关于时间转换问题的文章，是通过类别来做的。在使用过程中发现以下几点不方便之处，故更改为继承的方式来实现。
1.手机系统切换时区后会有异常错误
2.日期转换过程中针对时区、时间风格的可定制性很小
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface ConvertDateFormatter : NSDateFormatter
- (instancetype)initWithDateFormat:(nullable NSString *)dateFormat timeZone:(nullable NSTimeZone *)timeZone;
/// 时间转换为字符串
- (NSString *)dateConverToTimeStr:(NSDate *)date;
/// 时间转换为时间戳
- (double)dateConverToTimeStamp:(NSDate *)date;
/// 时间戳转换为时间字符串
- (NSString *)timeStampConverToTimeStr:(double)timeStamp;
/// 时间戳转换为时间
- (NSDate *)timeStampConverToNSDate:(double)timeStamp;
/// 时间字符串转换为时间戳
- (double)timeStrConverToTimeStamp:(NSString *)timeStr;
@end
NS_ASSUME_NONNULL_END
#import "ConvertDateFormatter.h"
@implementation ConvertDateFormatter
#pragma mark --- instancetype
- (instancetype)initWithDateFormat:(nullable NSString *)dateFormat timeZone:(nullable NSTimeZone *)timeZone {
self = [super init];
if (!self) return nil;
// 设置默认dateFormat
if (!dateFormat) dateFormat = @"YYYY-MM-dd HH:mm:ss";
// 设置默认timeZone
if (!timeZone) timeZone = [NSTimeZone timeZoneWithName:@"Asia/Shanghai"];
self.dateFormat = dateFormat;
self.timeZone = timeZone;
return self;
}
- (instancetype)init {
return [self initWithDateFormat:nil timeZone:nil];
}
#pragma mark --- conver
- (NSString *)dateConverToTimeStr:(NSDate *)date {
return [self stringFromDate:date];
}
- (double)dateConverToTimeStamp:(NSDate *)date {
NSTimeInterval stamp = [date timeIntervalSince1970];
return stamp;
}
- (NSString *)timeStampConverToTimeStr:(double)timeStamp {
NSDate *date = [self timeStampConverToNSDate:timeStamp];
NSString *timeStr = [self dateConverToTimeStr:date];
return timeStr;
}
- (NSDate *)timeStampConverToNSDate:(double)timeStamp {
return [NSDate dateWithTimeIntervalSince1970:timeStamp];
}
- (double)timeStrConverToTimeStamp:(NSString *)timeStr {
NSDate *date = [self dateFromString:timeStr];
double timeStamp = [self dateConverToTimeStamp:date];
return timeStamp;
}
@end
使用
// 以下测试均为北京时间
NSString *testTimeStr = @"2019-11-13 15:03:16";
double testTimeStamp = 1573628596;
// ConvertDateFormatter *formatter = [[ConvertDateFormatter alloc]initWithDateFormat:@"YYYY-MM-dd HH:mm:ss" timeZone:[NSTimeZone timeZoneWithName:@"Asia/Shanghai"]];
ConvertDateFormatter *formatter = [[ConvertDateFormatter alloc]init];
NSDate *strToDate = [formatter dateFromString:testTimeStr];
NSDate *timeStampToDate = [formatter timeStampConverToNSDate:testTimeStamp];
double timeStamp = [formatter timeStrConverToTimeStamp:testTimeStr];
NSLog(@"strToDate: %@",strToDate);
NSLog(@"timeStampToDate: %@",timeStampToDate);
NSLog(@"timeStamp: %.0f",timeStamp);
在使用过程中有问题的话，还望评论中告知，多谢
