最近在做基于XMPP的IM,开发到发送语音消息的功能.在某度上搜了很久也没有找到适合的方法.索性自己琢磨了一个,提供给大家参考.(其中找到的很多文章都是一个复制另一个的,很烦!没格式没头没尾的.给不了人任何思路的一堆文字)

发送语音功能模块主要有三个模块

• 手势按钮
• 语音录音机(压缩音频数据用于上传发送)
• 语音播放器(播放接收的压缩语音消息)

Part 1 :手势按钮

仿照经常使用的微信"发送消息"按钮.当时第一想法就是想到- (BOOL)containsPoint:(CGPoint)p;方法.

直接上代码

.h

#import <UIKit/UIKit.h>

@protocol DPChatToolBarAudioDelegate <NSObject>

/*
 * 录音完成
 *
 * @param audioData amr文件data
 * @prram body      附带信息,比如录音时长等信息
 */
- (void)DPAudioRecordingFinishWithData:(NSData *)audioData withBodyString:(NSString *)body;

@optional

/*
 * 开始录音
 *
 * @param isRecording 是否开始
 *
 */
- (void)DPAudioStartRecording:(BOOL)isRecording;

/*
 * 录音失败
 */
- (void)DPAudioRecordingFail:(NSString *)reason;

/*
 * 音频值测量
 *
 * @param power 音频值
 */
- (void)DPAudioSpeakPower:(float)power;

@end

@interface ChatToolBarAudioButton : UIButton

@property (nonatomic, assign) id <DPChatToolBarAudioDelegate> delegate;

@end

.m

#import "ChatToolBarAudioButton.h"

@interface ChatToolBarAudioButton () <DPAudioRecorderDelegate>
{
    BOOL isShouldSendAudioMessage;         //用户是否取消发送消息
    NSUInteger __block audioTimeLength; //录音时长
}

@end

@implementation ChatToolBarAudioButton

- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        
        self.layer.cornerRadius = 4;
        self.clipsToBounds = YES;
        [self.titleLabel setTextAlignment:NSTextAlignmentCenter];
        [self setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [self setTitle:@"按住 说话" forState:UIControlStateNormal];
        [self setTitle:@"松开 结束" forState:UIControlStateHighlighted];
        [self setBackgroundImage:[UIImage imageNamed:@"chatBar_recordBg"] forState:UIControlStateNormal];
        [self setBackgroundImage:[UIImage imageNamed:@"chatBar_recordSelectedBg"] forState:UIControlStateHighlighted];
        
        //增加长按手势
        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
        longPress.minimumPressDuration = 0;
        [self addGestureRecognizer:longPress];
    }
    return self;
}

- (void)longPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
    CGPoint point = [gestureRecognizer locationInView:self];
    
    if(gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        [self setTitle:@"松开 结束" forState:UIControlStateNormal];
        [self setBackgroundImage:[UIImage imageNamed:@"chatBar_recordSelectedBg"] forState:UIControlStateNormal];
        [self audioStart];
    } else if(gestureRecognizer.state == UIGestureRecognizerStateEnded) {
        [self setTitle:@"按住 说话" forState:UIControlStateNormal];
        [self setBackgroundImage:[UIImage imageNamed:@"chatBar_recordBg"] forState:UIControlStateNormal];
        [self audioStop];
    } else if(gestureRecognizer.state == UIGestureRecognizerStateChanged) {
        if ([self.layer containsPoint:point]) {
            [self setTitle:@"松开 结束" forState:UIControlStateNormal];
            isCancelSendAudioMessage = NO;
        } else {
            [self setTitle:@"松开 取消" forState:UIControlStateNormal];
            isCancelSendAudioMessage = YES;
        }
    } else if (gestureRecognizer.state == UIGestureRecognizerStateFailed) {
        NSLog(@"失败");
    } else if (gestureRecognizer.state == UIGestureRecognizerStateCancelled) {
        NSLog(@"取消");
    }
}

- (void)audioStart
{
    //开始录音
    [[DPAudioRecorder sharedInstance] startRecording];
}

//结束录音
- (void)audioStop
{
    [[DPAudioRecorder sharedInstance] stopRecording];
}

//录音失败
- (void)audioFailed
{
    //do something
}
@end

效果图:

发送语音按钮.gif

Demo 地址 :https://github.com/XL-Andrew/ChatToolBarAudioButton