后台连续播放音乐文件 

#import <AudioToolbox/AudioToolbox.h>
 1 -(void) becomeFirstResponse{
 2     [[AVAudioSession sharedInstance] setDelegate: self];
 3     [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
 4     UInt32 doSetProperty = 0;
 5     AudioSessionSetProperty (
 6                              kAudioSessionProperty_OverrideCategoryMixWithOthers,
 7                              sizeof (doSetProperty),
 8                              &doSetProperty
 9                              );
10     NSError *activationError = nil;
11     [[AVAudioSession sharedInstance] setActive: YES error: &activationError];
12     UIDevice *device = [UIDevice currentDevice];
13     BOOL backgroundSupported = NO;
14     if ([device respondsToSelector:@selector(isMultitaskingSupported)]) {
15         backgroundSupported = device.multitaskingSupported;
16         if (backgroundSupported == YES) {
17             [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
18             //            [self.window becomeFirstResponder];
19         }
20     }
21 }

 .plist文件加上：

<key>UIBackgroundModes</key>
    <array>
        <string>audio</string>
    </array>

posted @ 2012-07-06 19:30  ValeTu  阅读(302)  评论(0)  编辑  收藏  举报