【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】怎么在iOS中獲取系統(tǒng)iTunes音樂(lè)

【移動(dòng)應(yīng)用開(kāi)發(fā)技術(shù)】怎么在iOS中獲取系統(tǒng)iTunes音樂(lè)

這篇文章將為大家詳細(xì)講解有關(guān)怎么在iOS中獲取系統(tǒng)iTunes音樂(lè)，文章內(nèi)容質(zhì)量較高，因此在下分享給大家做個(gè)參考，希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。一、創(chuàng)建MPMediaPickerController

*mpc

=

[[MPMediaPickerControlleralloc]initWithMediaTypes:MPMediaTypeMusic];

mpc.delegate

=

self;//委托

mpt

=@"Please

select

a

music";//提示文字

mpc.allowsPickingMultipleItems=NO;//是否允許一次選擇多個(gè)上述代碼創(chuàng)建了一個(gè)MPMediaPickerController并設(shè)置了相關(guān)屬性。其中初始化的時(shí)候有一個(gè)參數(shù)是媒體類型，媒體類型可以是下面這些值：enum

{

//

audio

MPMediaTypeMusic

=

1

<<

0,

MPMediaTypePodcast

=

1

<<

1,

MPMediaTypeAudioBook

=

1

<<

2,

MPMediaTypeAudioITunesU

=

1

<<

3,

//

available

in

iOS

5.0

MPMediaTypeAnyAudio

=

0x00ff,

//

video

(available

in

iOS

5.0)

MPMediaTypeMovie

=

1

<<

8,

MPMediaTypeTVShow

=

1

<<

9,

MPMediaTypeVideoPodcast

=

1

<<

10,

MPMediaTypeMusicVideo

=

1

<<

11,

MPMediaTypeVideoITunesU

=

1

<<

12,

MPMediaTypeAnyVideo

=

0xff00,

MPMediaTypeAny

=

~0

};

typedef

NSInteger

MPMediaType;二、委托函數(shù)-

(void)mediaPicker:(MPMediaPickerController

*)mediaPicker

didPickMediaItems:(MPMediaItemCollection

*)mediaItemCollection{

/*insert

your

code*/

for

(

MPMediaItem*

itemin

[mediaItemCollection

items])

{

}

[selfdismissModalViewControllerAnimated:YES];

[mediaPicker

release];

}在上面這個(gè)函數(shù)里你可以處理所選取的內(nèi)容。下面這個(gè)函數(shù)負(fù)責(zé)處理選中后取消的動(dòng)作：-(void)mediaPickerDidCancel:(MPMediaPickerController

*)mediaPicker{

/*insert

your

code*/

[selfdismissModalViewControllerAnimated:YES];

[mediaPicker

release];

}三、顯示你可以在任何需要顯示的時(shí)候調(diào)用下面代碼：[selfpresentModalViewController:mpc

animated:YES];使用系統(tǒng)自帶的控制器選擇iTunes歌曲#pragma

mark

-使用系統(tǒng)自帶的控制器

-

(void)presentiTunesMediaPickerController

{

//1.創(chuàng)建媒體選擇器

/**MPMediaType（大概有13種，這里只列出比較常用的幾種）

MPMediaTypeMusic:音樂(lè)歌曲

MPMediaTypePodcast：博客（有聲雜志）

MPMediaTypeAudioITunesU:iTuneU中的有聲讀物

MPMediaTypeMovie：電影

*/

MPMediaPickerController

*controller

=

[[MPMediaPickerController

alloc]

initWithMediaTypes:MPMediaTypeMusic];

//2.是否支持多選,默認(rèn)為no

controller.allowsPickingMultipleItems

=

YES;

//在導(dǎo)航欄的上方添加一個(gè)提示文本

mpt

=

@"傳智播客-黑馬程序員";

//3.設(shè)置代理（代理比較簡(jiǎn)單，只有兩個(gè)方法，完成選取和取消選?。?/p>

controller.delegate

=

self;

//4.彈出媒體選擇器

[self

presentViewController:controller

animated:YES

completion:nil];

}1、MPMediaPickerControllerDelegate代理#pragma

mark

-MPMediaPickerControllerDelegate

//完成選取

-

(void)mediaPicker:(MPMediaPickerController

*)mediaPicker

didPickMediaItems:(MPMediaItemCollection

*)mediaItemCollection

{

for

(MPMediaItem

*song

in

mediaItemCollection.items)

{

//解析數(shù)據(jù)

[self

resolverMediaItem:song];

}

//解除媒體選擇器器

[mediaPicker

dismissViewControllerAnimated:YES

completion:nil];

}

//取消選取

-

(void)mediaPickerDidCancel:(MPMediaPickerController

*)mediaPicker

{

//解除媒體選擇器器

[mediaPicker

dismissViewControllerAnimated:YES

completion:nil];

}2、解析iTunes歌曲數(shù)據(jù)#pragma

mark

-解析iTune音樂(lè)數(shù)據(jù)

-

(void)resolverMediaItem:(MPMediaItem

*)song

{

//歌名

NSString

*name

=

[song

valueForProperty:

MPMediaItemPropertyTitle];

//歌曲路徑

NSString

*url

=

[song

valueForProperty:

MPMediaItemPropertyAssetURL];

//歌手名字

NSString

*songer

=

[song

valueForProperty:

MPMediaItemPropertyArtist];

//歌曲時(shí)長(zhǎng)（單位：秒）

NSTimeInterval

INW

=

[[song

valueForProperty:

MPMediaItemPropertyPlaybackDuration]

doubleValue];

NSString

*time;

if((int)INW%60<10)

{

time

=

[NSString

stringWithFormat:@"%d:0%d",(int)INW/60,(int)INW%60];

}

else

{

time

=

[NSString

stringWithFormat:@"%d:%d",(int)INW/60,(int)INW%60];

}

if(songer

==

nil)

{

songer

=

@"未知歌手";

}

//歌曲插圖（如果沒(méi)有插圖，則返回nil）

MPMediaItemArtwork

*artwork

=

[song

valueForProperty:

MPMediaItemPropertyArtwork];

//從插圖中獲取圖像，參數(shù)size是圖像的大小

UIImage

*image

=

[artwork

imageWithSize:CGSizeMake(50,

50)];

self.label.text

=

[NSString

stringWithFormat:@"歌名：%@

\n

歌曲路徑：%@

\n

歌手名字:%@

\n

歌曲時(shí)長(zhǎng)%@

\n

歌曲插圖：%@",name,url,songer,time,image];

}只獲取iTunes中的數(shù)據(jù)，自定義界面解析數(shù)組的操作與使用系統(tǒng)自帶控制器的方式一致//

1.創(chuàng)建媒體選擇隊(duì)列（從ipod庫(kù)中讀出音樂(lè)文件）

MPMediaQuery

*everything

=

[[MPMediaQuery

alloc]

init];

//

2.創(chuàng)建讀取條件(類似于對(duì)數(shù)據(jù)做一個(gè)篩選)

Value：作用等同于MPMediaType枚舉值

MPMediaPropertyPredicate

*albumNamePredicate

=

[MPMediaPropertyPredicate

predicateWithValue:[NSNumber

numberWithInt:MPMediaTypeMusic

]

forProperty:

MPMediaItemPropertyMediaType];

//3.給隊(duì)列添加讀取條件

[everything

addFilterPredicate:albumNamePredicate];

//4.從隊(duì)列中獲取符合條件的數(shù)組集合

NSArray

*itemsFromGenericQuery

=

[everything

items];

//5.便利解析數(shù)據(jù)

for

(MPMediaItem

*song

in

itemsFromGenericQuery)

{

[self

resolverMediaItem:song];

}完整代碼#import

"ViewController.h"

#import

<MediaPlayer/MediaPlayer.h>

#import

<CoreFoundation/CoreFoundation.h>

@interface

ViewController

()<MPMediaPickerControllerDelegate>

@property

(weak,

nonatomic)

IBOutlet

UILabel

*label;

@end

@implementation

ViewController

-

(void)viewDidLoad

{

[super

viewDidLoad];

//

Do

any

additional

setup

after

loading

the

view,

typically

from

a

nib.

}

-

(void)touchesBegan:(NSSet<UITouch

*>

*)touches

withEvent:(UIEvent

*)event

{

[self

presentiTunesMediaPickerController];

}

#pragma

mark

-使用系統(tǒng)自帶的控制器

-

(void)presentiTunesMediaPickerController

{

//1.創(chuàng)建媒體選擇器

/**MPMediaType（大概有13種，這里只列出比較常用的幾種）

MPMediaTypeMusic:音樂(lè)歌曲

MPMediaTypePodcast：博客（有聲雜志）

MPMediaTypeAudioITunesU:iTuneU中的有聲讀物

MPMediaTypeMovie：電影

*/

MPMediaPickerController

*controller

=

[[MPMediaPickerController

alloc]

initWithMediaTypes:MPMediaTypeMusic];

//2.是否支持多選,默認(rèn)為no

controller.allowsPickingMultipleItems

=

YES;

//在導(dǎo)航欄的上方添加一個(gè)提示文本

mpt

=

@"傳智播客-黑馬程序員";

//3.設(shè)置代理（代理比較簡(jiǎn)單，只有兩個(gè)方法，完成選取和取消選取）

controller.delegate

=

self;

//4.彈出媒體選擇器

[self

presentViewController:controller

animated:YES

completion:nil];

}

#pragma

mark

-只獲取iTunes中的數(shù)據(jù)，界面自定義

-

(void)getiTuneLibrary

{

//

1.創(chuàng)建媒體選擇隊(duì)列（從ipod庫(kù)中讀出音樂(lè)文件）

MPMediaQuery

*everything

=

[[MPMediaQuery

alloc]

init];

//

2.創(chuàng)建讀取條件(類似于對(duì)數(shù)據(jù)做一個(gè)篩選)

Value：作用等同于MPMediaType枚舉值

MPMediaPropertyPredicate

*albumNamePredicate

=

[MPMediaPropertyPredicate

predicateWithValue:[NSNumber

numberWithInt:MPMediaTypeMusic

]

forProperty:

MPMediaItemPropertyMediaType];

//3.給隊(duì)列添加讀取條件

[everything

addFilterPredicate:albumNamePredicate];

//4.從隊(duì)列中獲取符合條件的數(shù)組集合

NSArray

*itemsFromGenericQuery

=

[everything

items];

//5.便利解析數(shù)據(jù)

for

(MPMediaItem

*song

in

itemsFromGenericQuery)

{

[self

resolverMediaItem:song];

}

}

#pragma

mark

-解析iTune音樂(lè)數(shù)據(jù)

-

(void)resolverMediaItem:(MPMediaItem

*)song

{

//歌名

NSString

*name

=

[song

valueForProperty:

MPMediaItemPropertyTitle];

//歌曲路徑

NSString

*url

=

[song

valueForProperty:

MPMediaItemPropertyAssetURL];

//歌手名字

NSString

*songer

=

[song

valueForProperty:

MPMediaItemPropertyArtist];

//歌曲時(shí)長(zhǎng)（單位：秒）

NSTimeInterval

INW

=

[[song

valueForProperty:

MPMediaItemPropertyPlaybackDuration]

doubleValue];

NSString

*time;

if((int)INW%60<10)

{

time

=

[NSString

stringWithFormat:@"%d:0%d",(int)INW/60,(int)INW%60];

}

else

{

time

=

[NSString

stringWithFormat:@"%d:%d",(int)INW/60,(int)INW%60];

}

if(songer

==

nil)

{

songer

=

@"未知歌手";

}

//歌曲插圖（如果沒(méi)有插圖，則返回nil）

MPMediaItemArtwork

*artwork

=

[song

valueForProperty:

MPMediaItemPropertyArtwork];

//從插圖中獲取圖像，參數(shù)size是圖像的大小

UIImage

*image

=

[artwork

imageWithSize:CGSizeMake(50,

50)];

self.label.text

=

[NSString

stringWithFormat:@"歌名：%@

\n

歌曲路徑：%@

\n

歌手名字:%@

\n

歌曲