iOS使用系統相冊、相機、音視頻工具類

在IOS開發中經常會用到系統相冊，相機，音視頻等功能。每次都寫比較麻煩，自己封裝了一個工具類，實現一句話調用系統相冊，相機，音視頻等功能。方便以后項目的開發。

//選擇圖片

[[OCSystemTool shareTool]choosePicture:self editor:YES finished:^(UIImage * _Nullable image) {

_headerView.image = image;

}];

//視頻：http://baobab.wdjcdn.com/14562919706254.mp4

[[OCSystemTool shareTool]playVideoWithPath:@"apple.mp4" viewController:self];

//音樂

[[OCSystemTool shareTool]playAudioWithPath:@"song.mp3"];

//停止音樂播放

[[OCSystemTool shareTool]stopAudioPlayer];

本文附上OC版代碼：（PS:Swift3.0版見鏈接www.lxweimin.com/p/c8e99bf35970）

.h文字

////? Tool.h//? SystemFunction////? Copyright (c) 2017年 hailong. All rights reserved.//#import#import#import#import@interface Tool : NSObject///<1>定義block

typedef void(^myBlock)(UIImage * _Nullable image);

///<2>聲明屬性

@property (nonatomic, copy) myBlock _Nullable block;

//音頻播放器

@property (nonatomic, strong) AVAudioPlayer * _Nullable audioPlayer;

//帶有視頻播放器的控制器,能夠播放MP4、MOV、avi、以及流媒體m3u8格式的視頻,能夠播放遠程和本地的視頻資源

@property (nonatomic, strong) AVPlayerViewController * _Nullable playerController;

@property (nonatomic, strong) AVPlayer *_Nullable videoPlayer;

//1 返回單例的靜態方法

+(Tool *_Nullable)shareTool;

//2 選擇圖片

- (void)choosePicture:(UIViewController *_Nullable)controller editor:(BOOL)editor finished:(void (^_Nullable)(UIImage * _Nullable image))success;

//3 播放聲音

- (void)playAudioWithPath:(NSString *_Nullable)sound;

//停掉音頻

- (void)stopAudioPlayer;

///4 播放視頻

-(void)playVideoWithPath:(NSString *_Nullable)videoPath viewController:(UIViewController*_Nullable)viewController;

//返回特定尺寸的UImage? ,? image參數為原圖片，size為要設定的圖片大小

-(UIImage*_Nonnull)resizeImageToSize:(CGSize)size

sizeOfImage:(UIImage *_Nullable)image;

//在指定的視圖內進行截屏操作,返回截屏后的圖片

-(UIImage *_Nullable)imageWithScreenContentsInView:(UIView *_Nullable)view;

@end

.m文件

////? Tool.m//? SystemFunction////? Copyright (c) 2017年 hailong. All rights reserved.//#import "Tool.h"#import//里面預置了跟系統設置資源相關的常量和一些參數#import@implementation Tool

static Tool *_shareTool =nil;

///1 返回單例的靜態方法

+(Tool *)shareTool

{

//確保線程安全

@synchronized(self){

//確保只返回一個實例

if (_shareTool == nil) {

_shareTool = [[Tool alloc] init];

}

}

return _shareTool;

}

-(id)init

{

self = [super init];

if (self) {

}

return self;

}

///2 選擇圖片

- (void)choosePicture:(UIViewController *)controller editor:(BOOL)editor finished:(void (^)(UIImage * _Nullable image))success{

///<3>實現block

self.block = success;

UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"請選擇圖片" message:nil preferredStyle:(UIAlertControllerStyleActionSheet)];

[alertC addAction:[UIAlertAction actionWithTitle:@"拍照" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {

//相機

[self loadImagePickerWithSourceType:UIImagePickerControllerSourceTypeCamera controller:controller editor:editor];

}]];

[alertC addAction:[UIAlertAction actionWithTitle:@"從相冊選取" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {

//相冊庫

[self loadImagePickerWithSourceType:UIImagePickerControllerSourceTypePhotoLibrary controller:controller editor:editor];

}]];

[alertC addAction:[UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) {

}]];

[controller presentViewController:alertC animated:YES completion:nil];

}

///3 播放聲音

- (void)playAudioWithPath:(NSString *_Nullable)audioPath{

//音頻

NSURL *url;

//https 更安全的http協議

if ([audioPath rangeOfString:@"http://"].location != NSNotFound||[audioPath rangeOfString:@"https://"].location != NSNotFound) {

//遠程的地址

url = [NSURL URLWithString:audioPath];

}else{

//本地的路徑

NSString *localPath = [[NSBundle mainBundle] pathForResource:audioPath ofType:nil];

if (localPath.length==0) {

NSLog(@"沒有讀到資源!");

return;

}

url = [NSURL fileURLWithPath:localPath];

}

if (_audioPlayer) {

_audioPlayer = nil;

}

//AVPlayer

_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];

//設置代理

_audioPlayer.delegate = self;

[_audioPlayer prepareToPlay];//預處理

[_audioPlayer play];//播放

}

//停掉音頻

- (void)stopAudioPlayer{

if (_audioPlayer) {

[_audioPlayer stop];//停止播放

_audioPlayer = nil;

}

}

///4 播放視頻

-(void)playVideoWithPath:(NSString *)videoPath viewController:(UIViewController*)viewController{

NSURL *url;

//https 更安全的http協議

if ([videoPath rangeOfString:@"http://"].location !=NSNotFound||[videoPath rangeOfString:@"https://"].location!=NSNotFound) {

//遠程的地址

url = [NSURL URLWithString:videoPath];

}else{

NSString *localPath = [[NSBundle mainBundle] pathForResource:videoPath ofType:nil];

if (localPath.length==0) {

NSLog(@"沒有找到資源");

return;

}

url = [NSURL fileURLWithPath:localPath];

}

_playerController = [[AVPlayerViewController alloc]init];

_videoPlayer = [[AVPlayer alloc]initWithURL:url];

_playerController.player = _videoPlayer;

/*

可以設置的值及意義如下：

AVLayerVideoGravityResizeAspect? 不進行比例縮放 以寬高中長的一邊充滿為基準

AVLayerVideoGravityResizeAspectFill 不進行比例縮放 以寬高中短的一邊充滿為基準

AVLayerVideoGravityResize? ? 進行縮放充滿屏幕

*/

_playerController.videoGravity = AVLayerVideoGravityResizeAspect;

[viewController presentViewController:_playerController animated:YES completion:^{

[self stopAudioPlayer];//停掉音頻

//播放

[_playerController.player play];

}];

//NSNotificationCenter 通知中心，單例,可以理解為程序中的廣播站

//在通知中心注冊self成為某條廣播的觀察者(具有接收某條廣播能力的一個對象)

//name 廣播的名稱

//作用:一旦有其他對象通過通知中心發送MPMoviePlayerPlaybackDidFinishNotification這條廣播,self就能接收到，進而觸發@selector方法

//涉及到對象一對多的場景(非常重要)

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playFinished) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];

//通過通知中心發廣播

//點擊Done按鈕，播放器會自動通過通知中心發送廣播

//[[NSNotificationCenter defaultCenter] postNotificationName:MPMoviePlayerPlaybackDidFinishNotification object:nil];

}

- (void)playFinished{

//通過通知中心注銷(移除)self對廣播的觀察

[[NSNotificationCenter defaultCenter] removeObserver:self name:AVPlayerItemDidPlayToEndTimeNotification object:nil];

if (_playerController) {

[_playerController.player pause];

_playerController = nil;

}

}

#pragma mark - AVAudioPlayerDelegate

//一首歌播放完成后，調用此方法

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{

NSLog(@"finshed!");

}

//當操作系統級別的功能介入(短信、電話)，播放器被打斷時，調用

- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player{

NSLog(@"begin interruption!");

}

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags{

if (player) {

[player play];//播放和繼續播放

}

}

#pragma mark - 調用相機和相冊庫資源

- (void)loadImagePickerWithSourceType:(UIImagePickerControllerSourceType)type controller:(UIViewController *)controller editor:(BOOL)editor{

if (![UIImagePickerController isSourceTypeAvailable:type]){

[self showAlertWithMessage:@"相機無法使用" controller:controller];

return;

}

//UIImagePickerController 系統封裝好的加載相機、相冊庫資源的類

UIImagePickerController *picker = [[UIImagePickerController alloc] init];

//加載不同的資源

picker.sourceType =type;

//是否允許picker對圖片資源進行優化

picker.allowsEditing = editor;

picker.delegate = self;

//軟件中習慣通過present的方式，呈現相冊庫

[controller presentViewController:picker animated:YES completion:^{

}];

}

- (void)showAlertWithMessage:(NSString *)message controller:(UIViewController *)controller {

UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"溫馨提示" message:message preferredStyle:(UIAlertControllerStyleAlert)];

[alertC addAction:[UIAlertAction actionWithTitle:@"確定" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) {

}]];

[controller presentViewController:alertC animated:YES completion:nil];

}

#pragma mark - 在指定的視圖內進行截屏操作,返回截屏后的圖片

-(UIImage *)imageWithScreenContentsInView:(UIView *)view

{

//根據屏幕大小，獲取上下文

UIGraphicsBeginImageContext([[UIScreen mainScreen] bounds].size);

[view.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return viewImage;

}

-(UIImage*)resizeImageToSize:(CGSize)size

sizeOfImage:(UIImage*)image

{

UIGraphicsBeginImageContext(size);

//獲取上下文內容

CGContextRef ctx= UIGraphicsGetCurrentContext();

CGContextTranslateCTM(ctx, 0.0, size.height);

CGContextScaleCTM(ctx, 1.0, -1.0);

//重繪image

CGContextDrawImage(ctx,CGRectMake(0.0f, 0.0f, size.width, size.height), image.CGImage);

//根據指定的size大小得到新的image

UIImage* scaled= UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return scaled;

}

#pragma mark - UIImagePickerControllerDelegate

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

//選擇完照片 或者 照完相之后 ，會調用該方法，并且選擇的圖片或者照出來的圖片都存到了info里面

/*

if (picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

_headerView.image = image;

}else if (picker.sourceType == UIImagePickerControllerSourceTypeCamera){

UIImage *image =[info objectForKey:UIImagePickerControllerEditedImage];

_headerView.image = image;

}*/

//獲取資源的類型(圖片or視頻)

NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

//kUTTypeImage 代表圖片資源類型

if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {

//直接拿到選中的圖片,

//手機拍出的照片大概在2M左右，拿到程序中對圖片進行頻繁處理之前，需要對圖片進行轉換，否則很容易內存超范圍，程序被操作系統殺掉

UIImage *EditedImage = [info objectForKey:UIImagePickerControllerEditedImage];

UIImage *smallImage = [self resizeImageToSize:CGSizeMake(200,200) sizeOfImage:EditedImage];

///<4>調用block

self.block(smallImage);

}

[picker dismissViewControllerAnimated:YES completion:^{

}];

}

//取消選擇的圖片

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

[picker dismissViewControllerAnimated:YES completion:^{

}];

}

@end

/*

@interface ImageTool()

@end

*/

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