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TUIKit/TUIChat/UI_Classic/Cell/Custom/TUILinkCell.m

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+//
+//  MyCustomCell.m
+//  TUIKitDemo
+//
+//  Created by annidyfeng on 2019/6/10.
+//  Copyright © 2019 Tencent. All rights reserved.
+//
+
+#import "TUILinkCell.h"
+#import <TUICore/TUIGlobalization.h>
+#import <TUICore/TUIThemeManager.h>
+
+@implementation TUILinkCell
+
+- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
+    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
+    if (self) {
+        _myTextLabel = [[UILabel alloc] init];
+        _myTextLabel.numberOfLines = 0;
+        _myTextLabel.font = [UIFont systemFontOfSize:15];
+        _myTextLabel.textAlignment = isRTL()?NSTextAlignmentRight:NSTextAlignmentLeft;
+        _myTextLabel.textColor = TUIChatDynamicColor(@"chat_link_message_title_color", @"#000000");
+        [self.container addSubview:_myTextLabel];
+
+        _myLinkLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+        _myLinkLabel.text = TIMCommonLocalizableString(TUIKitMoreLinkDetails);
+        _myLinkLabel.font = [UIFont systemFontOfSize:15];
+        _myLinkLabel.textAlignment = isRTL()?NSTextAlignmentRight:NSTextAlignmentLeft;
+        _myLinkLabel.textColor = TUIChatDynamicColor(@"chat_link_message_subtitle_color", @"#0000FF");
+        [self.container addSubview:_myLinkLabel];
+    }
+    return self;
+}
+
+- (void)fillWithData:(TUILinkCellData *)data;
+{
+    [super fillWithData:data];
+    self.customData = data;
+    self.myTextLabel.text = data.text;
+    
+    // tell constraints they need updating
+    [self setNeedsUpdateConstraints];
+
+    // update constraints now so we can animate the change
+    [self updateConstraintsIfNeeded];
+
+    [self layoutIfNeeded];
+}
+
+
++ (BOOL)requiresConstraintBasedLayout {
+    return YES;
+}
+
+// this is Apple's recommended place for adding/updating constraints
+- (void)updateConstraints {
+     
+    [super updateConstraints];
+    CGRect rect = [self.myTextLabel.text boundingRectWithSize:CGSizeMake(245, MAXFLOAT)
+                                                      options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
+                                                   attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:15]}
+                                                      context:nil];
+    [self.myTextLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
+        make.top.mas_equalTo(10);
+        make.leading.mas_equalTo(10);
+        make.width.mas_equalTo(245);
+        make.height.mas_equalTo(rect.size.height);
+    }];
+    [self.myLinkLabel sizeToFit];
+    [self.myLinkLabel mas_remakeConstraints:^(MASConstraintMaker *make) {
+        make.top.mas_equalTo(self.myTextLabel.mas_bottom).mas_offset(15);
+        make.leading.mas_equalTo(10);
+        make.width.mas_equalTo(self.myLinkLabel.frame.size.width);
+        make.height.mas_equalTo(self.myLinkLabel.frame.size.height);
+    }];
+}
+- (void)layoutSubviews {
+    [super layoutSubviews];
+}
+
+#pragma mark - TUIMessageCellProtocol
++ (CGSize)getContentSize:(TUIMessageCellData *)data {
+    NSAssert([data isKindOfClass:TUILinkCellData.class], @"data must be kind of TUILinkCellData");
+    TUILinkCellData *linkCellData = (TUILinkCellData *)data;
+    
+    CGFloat textMaxWidth = 245.f;
+    CGRect rect = [linkCellData.text boundingRectWithSize:CGSizeMake(textMaxWidth, MAXFLOAT)
+                                                  options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
+                                               attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:15]}
+                                                  context:nil];
+    CGSize size = CGSizeMake(textMaxWidth + 15, rect.size.height + 56);
+    return size;
+}
+
+@end