ios 气泡聊天
2024-08-24 19:08:16
最近做的项目里面,有几个模块用到了聊天功能和评论回复的功能,使用的频率还是很高的,所以抽时间做了这个博客,希望能给自己和别人带来方便,
具体代码如下:
1,创建model,
#import <Foundation/Foundation.h> @interface MessageObj : NSObject @property(nonatomic,copy)NSString *message;
@property(nonatomic,assign)BOOL isMe; @end
2,自定义cell
1)声明一个label和imageview
@property(nonatomic,strong)UIImageView *messageImg;
@property(nonatomic,strong)UILabel *messageLab;
2)初始化构造方法
-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
//这里只需要初始化,不需要设置具体的坐标
self.backgroundColor = [UIColor clearColor];
self.selectionStyle = UITableViewCellSelectionStyleNone;
_messageImg = [[UIImageView alloc]init];
[self addSubview:_messageImg];
_messageLab = [[UILabel alloc]init];
_messageLab.numberOfLines = ;
[self addSubview:_messageLab];
} return self;
}
3,准备工作已做好,现在进行聊天功能的完善
1)声明所需的成员变量
@interface ViewController ()<UITextFieldDelegate,UITableViewDelegate,UITableViewDataSource>
{
UITextField *tf;
UIView *inputView;
UIButton *rightBtn;
UITableView *tableViews; int _count;
NSMutableArray *_datasArray;
}
2)界面的布局,做好适配
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
_datasArray = [NSMutableArray array];//这里一定要记得初始化 self.title = @"气泡聊天";
self.view.backgroundColor = [UIColor whiteColor]; tableViews = [[UITableView alloc]initWithFrame:CGRectMake(, , MainScreen_width, self.view.bounds.size.height-) style:UITableViewStylePlain];
tableViews.delegate = self;
tableViews.dataSource = self;
tableViews.tableFooterView = [[UIView alloc]init];
tableViews.separatorStyle = UITableViewCellSeparatorStyleNone;
[self.view addSubview:tableViews]; inputView = [[UIView alloc]initWithFrame:CGRectMake(, MainScreen_height - , MainScreen_width, )];
inputView.backgroundColor = RGBAColor(, , , );
[self.view addSubview:inputView]; tf = [[UITextField alloc]initWithFrame:CGRectMake(, , MainScreen_width - , )];
tf.delegate = self;
tf.returnKeyType = UIReturnKeyDefault;
[inputView addSubview:tf]; rightBtn = [UIButton buttonWithType:UIButtonTypeCustom];
rightBtn.frame = CGRectMake(MainScreen_width - -, , MainScreen_width - tf.frame.size.width, );
[rightBtn setTitle:@"发送" forState:UIControlStateNormal];
[rightBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[rightBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
[inputView addSubview:rightBtn]; //增加监听,当键盘改变是发出消息
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; //增加监听,当键盘退出时发出消息
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
注:这里最后,声明了两个通知,这样是为了,监听键盘弹出和弹下的高度,
具体实现如下:
-(void)keyboardWillShow:(NSNotification *)hNotification
{
//获取键盘的高度
NSDictionary *userInfo = [hNotification userInfo];
NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [aValue CGRectValue];
int height = keyboardRect.size.height;//获取到的键盘的高度
[UIView animateWithDuration:0.1 animations:^{
CGRect tableFrame = tableViews.frame;
tableFrame.size.height = MainScreen_height - height - ;
tableViews.frame = tableFrame;
CGRect rect = inputView.frame;
rect.origin.y = MainScreen_height - height - ;
inputView.frame = rect;
}]; } -(void)keyboardWillHide:(NSNotification *)hNotification
{
[UIView animateWithDuration:0.1 animations:^{
CGRect tableViewRect = tableViews.frame;
tableViewRect.size.height = MainScreen_height- ;
tableViews.frame = tableViewRect;
CGRect rect = inputView.frame;
rect.origin.y = MainScreen_height - ;
inputView.frame = rect;
}]; if (_datasArray.count > )
{
//让表的最后一行滚动到表的底部
NSIndexPath * indexPath = [NSIndexPath indexPathForRow:_datasArray.count- inSection:];
[tableViews scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
}
3)发送按钮的点击方法
-(void)btnClick:(id)sender
{
_count ++;//这里声明一个int类型的变量是为了下面区分是否是自己 //这里使用model,会很方便,单独作为对象来使用,方便进行设置
MessageObj *objets = [[MessageObj alloc]init];
objets.message = tf.text; if (objets.message != nil && [objets.message isEqualToString:@""]) {
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"温馨体香" message:@"不能为空" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:nil, nil];
[alertView show];
return;
}else
{
//这里通过第一个发送的顺序,设为自己,其他为别人,然后绑定一个bool值的状态,yes为自己,no为别人
if (_count% == ) {
objets.isMe = YES;
}else
{
objets.isMe = NO;
} [_datasArray addObject:objets];
NSLog(@"--%lu",(unsigned long)_datasArray.count);
[tableViews reloadData]; //让表的最后一行滚动到表的底部
NSIndexPath * indexPath = [NSIndexPath indexPathForRow:_datasArray.count- inSection:];
[tableViews scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES]; tf.text = nil;
}
}
注:这里面有比较重要的地方,代码很详细,我就不一一解释了,大家可以自己看
4)表的具体展现和自适应
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _datasArray.count;
} -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
MessageObj *object = _datasArray[indexPath.row]; CGFloat contentW = MainScreen_width - ; UIFont *fnt = [UIFont fontWithName:@"HelveticaNeue" size:18.0f]; //ios 7 以后的方法,这里得到自适应的高度,从而动态的设置cell的高度
CGRect tempRect = [object.message boundingRectWithSize:CGSizeMake(contentW, ) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:fnt,NSFontAttributeName, nil] context:nil];
CGFloat contenH = tempRect.size.height; return contenH + ;
} -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifiers = @"CELLES";
EightyTableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (!cell) {
cell = [[EightyTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifiers];
cell.selectionStyle = UITableViewCellSelectionStyleDefault;
}
MessageObj *object = _datasArray[indexPath.row];
/*
CGFloat contentW = MainScreen_width - 34;
UIFont *fnt = [UIFont fontWithName:@"HelveticaNeue" size:18.0f];
CGRect tempRect = [object.message boundingRectWithSize:CGSizeMake(320, 1000) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:fnt,NSFontAttributeName, nil] context:nil];
CGFloat contenH = tempRect.size.height;
*/
//在这里进行宽度和高度的自适应
UIFont *fnt = [UIFont fontWithName:@"HelveticaNeue" size:18.0f];
CGSize size = CGSizeMake(MainScreen_width,1000);
CGSize labSize = [object.message sizeWithFont:fnt constrainedToSize:size lineBreakMode:UILineBreakModeWordWrap];
if (object.isMe == YES) {
cell.messageLab.frame = CGRectMake(20, 0, labSize.width, labSize.height);
cell.messageLab.textAlignment = NSTextAlignmentLeft;
cell.messageLab.numberOfLines = 0;
cell.messageImg.frame = CGRectMake(10, 0, labSize.width+20, labSize.height+10);
}else
{
cell.messageLab.frame = CGRectMake(MainScreen_width - 20 - labSize.width, 5, labSize.width, labSize.height);
cell.messageLab.numberOfLines = 0;
cell.messageLab.textAlignment = NSTextAlignmentRight;
cell.messageImg.frame = CGRectMake(MainScreen_width - 30 - labSize.width, 2, labSize.width + 20, labSize.height + 10);
}
NSString *imageName = object.isMe?@"bubbleSelf.png":@"bubble.png";
UIImage *oldImage = [UIImage imageNamed:imageName];
UIImage *newImage = [oldImage stretchableImageWithLeftCapWidth:18 topCapHeight:8];
cell.messageImg.image = newImage;
cell.messageLab.font = fnt;
cell.messageLab.text = object.message;
return cell;
}
注:主要就是cellforrow方法里面的lab自适应坐标的设置,还有气泡背景图片的坐标设置,还有heightforrow里面根据lab的高度,动态判定cell的高度
效果图如下:
如需源码,可从这里下载:http://code.cocoachina.com/view/131767
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