159 lines
4.8 KiB
Objective-C
159 lines
4.8 KiB
Objective-C
//
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// NSString+Extension.m
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// 新浪微博
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//
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// Created by 谢培艺 on 15/12/15.
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// Copyright © 2015年 iphone5solo. All rights reserved.
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//
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#import "NSString+PYExtension.h"
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@implementation NSString (PYExtension)
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- (CGSize)sizeWithMaxWidth:(CGFloat)maxWidth font:(UIFont *)font
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{
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NSMutableDictionary *attr = [NSMutableDictionary dictionary];
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attr[NSFontAttributeName] = font;
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return [self boundingRectWithSize:CGSizeMake(maxWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:attr context:nil].size;
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}
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// 时间转换 秒 -- > 具体日期
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+ (NSString *)intervalToDateWithIntervalString:(NSString *)intervalString
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{
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NSDate *date = [NSDate dateWithTimeIntervalSince1970:[intervalString longLongValue]];
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// 格式化时间
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NSDateFormatter *dateF = [[NSDateFormatter alloc] init];
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dateF.dateFormat = @"yyyy-MM-dd HH:mm:ss";
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NSString *dateStr = [dateF stringFromDate:date];
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return dateStr;
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}
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// 时间转换 具体日期 --> 秒数
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+ (NSString *)dateToIntervalWithDate:(NSDate *)date
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{
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NSTimeInterval time = [[NSDate date] timeIntervalSince1970];
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long long int dateStr = (long long int)time;
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return [NSString stringWithFormat:@"%lld", dateStr];
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}
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+ (NSString *)dayStringFromInterval:(NSTimeInterval)time
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{
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NSDate *date = [NSDate dateWithTimeIntervalSince1970:time];
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// 格式化时间
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NSDateFormatter *dateF = [[NSDateFormatter alloc] init];
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dateF.dateFormat = @"yyyy-MM-dd";
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NSString *dateStr = [dateF stringFromDate:date];
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return dateStr;
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}
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/**
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* 用于首页时间显示（刚刚、几分钟前、昨天...）
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*/
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- (NSString *)dateToNowWithDate:(NSDate *)createDate
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{
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// 转为发表时间
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// NSDate *time = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]];
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// NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
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// // 如果是真机调试，转换这种欧美时间，需要设置locale
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// fmt.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
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//
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// // 设置日期格式（声明字符串里面每个数字和单词的含义）
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// // E:星期几
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// // M:月份
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// // d:几号(这个月的第几天)
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// // H:24小时制的小时
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// // m:分钟
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// // s:秒
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// // y:年
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//// fmt.dateFormat = @"EEE MMM dd HH:mm:ss Z yyyy";
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// fmt.dateFormat = @"yyyy-MM-dd";
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// // _createAt = @"Tue Sep 30 17:06:25 +0800 2014";
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if ([self isThisYear:createDate]) { // 今年
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if ([self isYesterday:createDate]) { // 昨天
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return @"昨日";
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} else if ([self isToday:createDate]) { // 今天
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return @"今日";
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} else { // 今年的其他日子
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return nil;
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}
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} else { // 非今年
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return nil;
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}
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}
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/**
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* 判断是否为今天
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*/
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- (BOOL)isToday:(NSDate *)time
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{
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NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
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fmt.dateFormat = @"yyyy-MM-dd";
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NSString *dateStr = [fmt stringFromDate:time];
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NSString *nowDateStr = [fmt stringFromDate:[NSDate date]];
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NSDate *date = [fmt dateFromString:dateStr];
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NSDate *now = [fmt dateFromString:nowDateStr];
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// 比较时间差
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;
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NSDateComponents *cmp = [calendar components:unit fromDate:date toDate:now options:0];
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return cmp.year == 0 && cmp.month == 0 && cmp.day == 0;
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}
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/**
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* 判断是否为今年
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*/
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- (BOOL)isThisYear:(NSDate *)time
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{
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NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
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fmt.dateFormat = @"yyyy";
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NSString *dateStr = [fmt stringFromDate:time];
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NSString *nowDateStr = [fmt stringFromDate:[NSDate date]];
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NSDate *date = [fmt dateFromString:dateStr];
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NSDate *now = [fmt dateFromString:nowDateStr];
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// 比较时间差
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSCalendarUnit unit = NSCalendarUnitYear;
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NSDateComponents *cmp = [calendar components:unit fromDate:date toDate:now options:0];
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return cmp.year == 0;
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}
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/**
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* 判断是否为昨天
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*/
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- (BOOL)isYesterday:(NSDate *)time
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{
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NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
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fmt.dateFormat = @"yyyy-MM-dd";
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NSString *dateStr = [fmt stringFromDate:time];
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NSString *nowDateStr = [fmt stringFromDate:[NSDate date]];
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NSDate *date = [fmt dateFromString:dateStr];
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NSDate *now = [fmt dateFromString:nowDateStr];
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// 比较时间差
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;
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NSDateComponents *cmp = [calendar components:unit fromDate:date toDate:now options:0];
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return cmp.year == 0 && cmp.month == 0 && cmp.day == 1;
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}
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@end
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