yinmeng-ios/xplan-ios/Main/Message/Session/MessageCell.m

//
//  MessageCell.m
//  xplan-ios
//
//  Created by zu on 2021/11/28.
//

#import "MessageCell.h"
#import "NetImageView.h"
#import "ThemeColor.h"

#import "XPMacro.h"
#import <Masonry/Masonry.h>

@interface MessageCell()

/**
 左侧头像（私聊对象）
 */
@property (nonatomic, strong) NetImageView * leftAvatar;

/**
 右侧头像（自己）
 */
@property (nonatomic, strong) NetImageView * rightAvatar;

/**
 消息背景
 */
@property (nonatomic, strong) UIView * messageBackground;
@property (nonatomic, strong) MASConstraint * messageBackgroundLeft;
@property (nonatomic, strong) MASConstraint * messageBackgroundRight;

/**
 消息文本
 */
@property (nonatomic, strong) UILabel * messageText;

@end

@implementation MessageCell

/**
 当前仅支持 Text Message。
 
 扩展方向：
 新增Measure（Layout）工具类，按照 NIMMessageType 进行 measure 和生成对应的 Message content view。
 */
+ (CGFloat)measureHeight:(NIMMessage *)message {
    CGFloat minHeight = 45 + 15 * 2;
    if (!message) {
        return minHeight;
    }
    
    NSString * messageText = message.text;
    if (!messageText || (message.messageType != NIMMessageTypeTip && message.messageType != NIMMessageTypeText)) {
        messageText = @"未知消息类型";
    }
    
    CGSize dstRect = CGSizeMake(KScreenWidth - 15 * 2 * 2 - 45 * 2 - 10 * 2, MAXFLOAT);
    
    CGFloat msgHeight = [messageText boundingRectWithSize:dstRect options:NSStringDrawingUsesLineFragmentOrigin attributes:[self messageTextAttibutes] context:nil].size.height;
    CGFloat height = msgHeight + 5 + 15 * 2;
    
    return MAX(minHeight, height);
}

+ (NSDictionary<NSAttributedStringKey, id> *)messageTextAttibutes {
    UIFont *font = [UIFont systemFontOfSize:13.f];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:2.5];
    return @{
        NSFontAttributeName:font,
        NSParagraphStyleAttributeName: paragraphStyle
    };
}

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        [self initViews];
        [self initLayout];
    }
    return self;
}

- (void)initViews {
    self.backgroundColor = UIColor.clearColor;
    self.leftAvatar.backgroundColor = UIColor.redColor;
    self.rightAvatar.backgroundColor = UIColor.blueColor;
    [self.contentView addSubview:self.leftAvatar];
    [self.contentView addSubview:self.rightAvatar];
    [self.messageBackground addSubview:self.messageText];
    [self.contentView addSubview:self.messageBackground];
}

- (void)initLayout {
    [self.leftAvatar mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.top.mas_equalTo(self).offset(15);
        make.width.height.mas_equalTo(45);
    }];
    
    [self.rightAvatar mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(self).offset(15);
        make.right.mas_equalTo(self).offset(-15);
        make.width.height.mas_equalTo(45);
    }];
    
    [self.messageBackground mas_makeConstraints:^(MASConstraintMaker *make) {
        self.messageBackgroundLeft = make.left.mas_equalTo(self.leftAvatar.mas_right).offset(15);
        self.messageBackgroundRight = make.right.mas_equalTo(self.rightAvatar.mas_left).offset(-15);
        make.top.mas_equalTo(self).offset(20);
    }];
    
    [self.messageText mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.messageBackground).with.insets(UIEdgeInsetsMake(10, 10, 10, 10));
    }];
}

- (void)renderWithMessage:(NIMMessage *)message {
    NSString * avatarUrl = [[NIMSDK sharedSDK].userManager userInfo:message.from].userInfo.avatarUrl;
    avatarUrl = [avatarUrl stringByReplacingOccurrencesOfString:@"https" withString:@"http"];
    BOOL isSelf = [[NIMSDK sharedSDK].loginManager.currentAccount isEqualToString:message.from];
    if (isSelf) {
        self.leftAvatar.hidden = YES;
        self.rightAvatar.hidden = NO;
        [self.messageBackgroundLeft uninstall];
        [self.messageBackgroundRight install];
        self.rightAvatar.imageUrl = avatarUrl;
    } else {
        self.leftAvatar.hidden = NO;
        self.rightAvatar.hidden = YES;
        [self.messageBackgroundLeft install];
        [self.messageBackgroundRight uninstall];
        self.leftAvatar.imageUrl = avatarUrl;
    }
    
    NSString * messageText = message.text;
    if (!messageText || (message.messageType != NIMMessageTypeTip && message.messageType != NIMMessageTypeText)) {
        messageText = @"未知消息类型";
    }
    
    _messageText.attributedText = [[NSAttributedString alloc] initWithString:messageText attributes:[MessageCell messageTextAttibutes]];
}

- (NetImageView *)leftAvatar {
    if (!_leftAvatar) {
        NetImageConfig * config = [[NetImageConfig alloc] init];
        config.placeHolder = [UIImageConstant defaultAvatarPlaceholder];
        config.radius = MAXFLOAT;
        _leftAvatar = [[NetImageView alloc] initWithConfig:config];
        _leftAvatar.layer.masksToBounds = YES;
        _leftAvatar.layer.cornerRadius = 45.f / 2;
        _leftAvatar.hidden = YES;
    }
    return _leftAvatar;
}

- (NetImageView *)rightAvatar {
    if (!_rightAvatar) {
        NetImageConfig * config = [[NetImageConfig alloc] init];
        config.placeHolder = [UIImageConstant defaultAvatarPlaceholder];
        config.radius = MAXFLOAT;
        _rightAvatar = [[NetImageView alloc] initWithConfig:config];
        _rightAvatar.layer.masksToBounds = YES;
        _rightAvatar.layer.cornerRadius = 45.f / 2;
        _rightAvatar.hidden = YES;
    }
    return _rightAvatar;
}

- (UIView *)messageBackground {
    if (!_messageBackground) {
        _messageBackground = [[UIView alloc]init];
        _messageBackground.backgroundColor = ThemeColor.appCellBackgroundColor;
        _messageBackground.layer.masksToBounds = YES;
        _messageBackground.layer.cornerRadius = 8.f;
    }
    return _messageBackground;
}

- (UILabel *)messageText {
    if (!_messageText) {
        _messageText = [[UILabel alloc]initWithFrame:CGRectZero];
        _messageText.preferredMaxLayoutWidth = KScreenWidth - 15 * 2 * 2 - 45 * 2 - 10 * 2;
        _messageText.textColor = ThemeColor.mainTextColor;
        _messageText.numberOfLines = 0;
    }
    return  _messageText;
}

@end