在做环信中，有些方法一直写也烦躁，所以封装了一些在环信中有用到的方法，可以直接调用使用。
1.取出消息中的文本
#pragma mark - 取出消息中的文本
+(NSString *)textFromMessage:(EMMessage *)message
{
EMMessageBody *body = message.body;
EMTextMessageBody *textBody = (EMTextMessageBody *)body;
NSString *text = textBody.text;
return text;
}
2.取出语音时间
#pragma mark - 取出语音时间
+(NSString*)voiceFromMessage:(int)duration
{
NSString *voiceDuration=[NSString stringWithFormat:@"%d''",duration];
return voiceDuration;
}
3.取出位置中的文本
#pragma mark - 取出位置中的文本
+(NSString *)locationFromMessage:(EMMessage *)message
{
EMMessageBody *body = message.body;
EMLocationMessageBody *locationBody = (EMLocationMessageBody *)body;
NSString *address = locationBody.address;
return address;
}
4.取出图片计算高
#pragma mark - 取出图片计算高
+(CGFloat)imgFromMessage:(EMMessage*)message
{
EMMessageBody *mesBody = message.body;
EMImageMessageBody *body=((EMImageMessageBody*)mesBody);
return EMImageHeihgt;
}
#define EMImageHeihgt 300*body.size.height/(body.size.width+body.size.height)
5.取出消息中的文本
#pragma mark计算文本高度
+(CGSize)heightWithLable:(NSString*)txtStr
andFont:(CGFloat)font
andWidth:(CGFloat)width
{
return [txtStr boundingRectWithSize:CGSizeMake(width+30, 10000) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:font]} context:nil].size;
}
//多加30是因为文字是放在button里面，边距距上下都是15
6.根据时间戳进行时间判断
#pragma mark根据时间戳进行时间判断
+(NSString *)timeStr:(long long)timestamp
{
// 创建日历对象
NSCalendar *calendar = [NSCalendar currentCalendar];
// 获取当前时间
NSDate *currentDate = [NSDate date];
// 获取当前时间的年、月、日。利用日历
NSDateComponents *components = [calendar components:NSCalendarUnitYear| NSCalendarUnitMonth|NSCalendarUnitDay fromDate:currentDate];
NSInteger currentYear = components.year;
NSInteger currentMonth = components.month;
NSInteger currentDay = components.day;
// 获取消息发送时间的年、月、日
NSDate *msgDate = [NSDate dateWithTimeIntervalSince1970:timestamp / 1000.0];
components = [calendar components:NSCalendarUnitYear| NSCalendarUnitMonth|NSCalendarUnitDay fromDate:msgDate];
CGFloat msgYear = components.year;
CGFloat msgMonth = components.month;
CGFloat msgDay = components.day;
// 进行判断
NSDateFormatter *dateFmt = [[NSDateFormatter alloc] init];
if (currentYear == msgYear && currentMonth == msgMonth && currentDay == msgDay)
{
//今天
dateFmt.dateFormat = @"HH:mm";
}
else if (currentYear == msgYear && currentMonth == msgMonth && currentDay-1 == msgDay)
{
//昨天
dateFmt.dateFormat = @"昨天 HH:mm";
}
else if(currentYear==msgYear && currentMonth==msgMonth && currentDay-msgDay>1 &¤tDay-msgDay<=7)
{
//当前时间的2天之前且一周之内
NSString *week=[MessageTool getWeekDayFordate:timestamp];
dateFmt.dateFormat=[NSString stringWithFormat:@"%@ HH:mm",week];
}
else if(currentYear-msgYear>=1)
{
//今年之前
dateFmt.dateFormat=@"yyyy-MM-dd HH:mm";
}
else
{
//前天前
dateFmt.dateFormat = @"MM-dd HH:mm";
}
// 返回处理后的结果
return [dateFmt stringFromDate:msgDate];
}
#pragma mark根据时间戳获取周几
+(NSString *)getWeekDayFordate:(long long)data
{
NSArray *weekday = [NSArray arrayWithObjects: [NSNull null], @"星期日", @"星期一", @"星期二", @"星期三", @"星期四", @"星期五", @"星期六", nil];
NSDate *newDate = [NSDate dateWithTimeIntervalSince1970:data];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *components =[calendar components:NSCalendarUnitWeekday fromDate:newDate];
NSString *weekStr =[weekday objectAtIndex:components.weekday];
return weekStr;
}
//用的时候直接调用+(NSString *)timeStr:(long long)timestamp这个方法
6.取出图片计算高
#pragma mark 类型为图片的时候做的操作
/**
* 图片
* @param imgV 赋值图片
* @param bgImgStr 图片底部气泡
*/
+(void)setBtnImgVWithChatImgV:(UIImageView*)imgV
andbgImgVStr:(NSString*)bgImgStr
{
UIImageView *bgImgV=[[UIImageView alloc]init];
bgImgV.image=[UIImage imageNamed:bgImgStr];
bgImgV.frame=imgV.frame;
//拉伸
[bgImgV setImage:[bgImgV.image stretchableImageWithLeftCapWidth:30 topCapHeight:30]];
CALayer *layer= bgImgV.layer;
layer.frame = (CGRect){{0,0},bgImgV.layer.frame.size};
imgV.layer.mask = layer;
[imgV setNeedsDisplay];
}
效果是这样的：
气泡图片效果
7.图片循环动画
#pragma mark 图片动画
/**
* 图片动画
*
* @param num 图片张数
* @param imgStr 图片名字
* @param animationDuration 图片动画时长
* @param repeatTime 图片动画重复次数
*
* @return 图片动画
*/
+(void)imgVVoiceWithNum:(int)num
andImgStr:(NSString*)imgStr
andImgV:(UIImageView*)imgV
andAnimationDuration:(float)animationDuration
andRepeatTime:(int)repeatTime
{
//创建一个数组，数组中按顺序添加要播放的图片（图片为静态的图片）
NSMutableArray *imgArray = [NSMutableArray array];
for (int i=1; i<=num; i++)
{
NSString *str=[NSString stringWithFormat:@"%@%d@2x",imgStr,i];
UIImage *image =Image(str);
[imgArray addObject:image];
}
//把存有UIImage的数组赋给动画图片数组
imgV.animationImages = imgArray;
//设置执行一次完整动画的时长
imgV.animationDuration = animationDuration;
//动画重复次数 （0为重复播放）
imgV.animationRepeatCount =repeatTime ;
//开始播放动画
[imgV startAnimating];
}
好啦，以上封装很实用，明天再整环信啦！
