我想在我的应用中播放视频。为此我使用了一个播放器，GUI播放器。问题是当我想玩时，播放方法不起作用。此外，prepareAndPlay自动工作。为什么？
我附上了代码：GUIPlayerView.h
#import <UIKit/UIKit.h>
@class GUIPlayerView;
@protocol GUIPlayerViewDelegate <NSObject>
@optional
- (void)playerDidPause;
- (void)playerDidPlay;
- (void)playerDidResume;
- (void)playerDidEndPlaying;
- (void)playerWillEnterFullscreen;
- (void)playerDidEnterFullscreen;
- (void)playerWillLeaveFullscreen;
- (void)playerDidLeaveFullscreen;
- (void)playerFailedToPlayToEnd;
- (void)playerStalled;
@end
@interface GUIPlayerView : UIView
@property (strong, nonatomic) NSURL *videoURL;
@property (assign, nonatomic) NSInteger controllersTimeoutPeriod;
@property (weak, nonatomic) id<GUIPlayerViewDelegate> delegate;
@property (strong, nonatomic) UIButton *fullscreenButton;
- (void)prepareAndPlayAutomatically:(BOOL)playAutomatically;
- (void)clean;
- (void)play;
- (void)pause;
- (void)stop;
- (void)toggleFullscreen:(UIButton *)button;
- (void)togglePlay:(UIButton *)button;
- (void)hideControllers;
- (BOOL)isPlaying;
- (void)setBufferTintColor:(UIColor *)tintColor;
- (void)setLiveStreamText:(NSString *)text;
- (void)setAirPlayText:(NSString *)text;
- (void)muteSound:(BOOL)mute;
@end
和GUIPlayer.m
//
// GUIPlayerView.m
// GUIPlayerView
//
// Created by Guilherme Araújo on 08/12/14.
// Copyright (c) 2014 Guilherme Araújo. All rights reserved.
//
#import "GUIPlayerView.h"
#import "GUISlider.h"
#import <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>
#import "UIView+UpdateAutoLayoutConstraints.h"
@interface GUIPlayerView () <AVAssetResourceLoaderDelegate, NSURLConnectionDataDelegate>
@property (strong, nonatomic) AVPlayer *player;
@property (strong, nonatomic) AVPlayerLayer *playerLayer;
@property (strong, nonatomic) AVPlayerItem *currentItem;
@property (strong, nonatomic) UIView *controllersView;
@property (strong, nonatomic) UILabel *airPlayLabel;
@property (strong, nonatomic) UIButton *playButton;
@property (strong, nonatomic) MPVolumeView *volumeView;
@property (strong, nonatomic) GUISlider *progressIndicator;
@property (strong, nonatomic) UILabel *currentTimeLabel;
@property (strong, nonatomic) UILabel *remainingTimeLabel;
@property (strong, nonatomic) UILabel *liveLabel;
@property (strong, nonatomic) UIView *spacerView;
@property (strong, nonatomic) UIActivityIndicatorView *activityIndicator;
@property (strong, nonatomic) NSTimer *progressTimer;
@property (strong, nonatomic) NSTimer *controllersTimer;
@property (assign, nonatomic) BOOL seeking;
@property (assign, nonatomic) BOOL fullscreen;
@property (assign, nonatomic) CGRect defaultFrame;
@end
@implementation GUIPlayerView
@synthesize player, playerLayer, currentItem;
@synthesize controllersView, airPlayLabel;
@synthesize playButton, fullscreenButton, volumeView, progressIndicator, currentTimeLabel, remainingTimeLabel, liveLabel, spacerView;
@synthesize activityIndicator, progressTimer, controllersTimer, seeking, fullscreen, defaultFrame;
@synthesize videoURL, controllersTimeoutPeriod, delegate;
#pragma mark - View Life Cycle
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
defaultFrame = frame;
[self setup];
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
[self setup];
return self;
}
- (void)setup {
// Set up notification observers
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerDidFinishPlaying:)
name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerFailedToPlayToEnd:)
name:AVPlayerItemFailedToPlayToEndTimeNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerStalled:)
name:AVPlayerItemPlaybackStalledNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(airPlayAvailabilityChanged:)
name:MPVolumeViewWirelessRoutesAvailableDidChangeNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(airPlayActivityChanged:)
name:MPVolumeViewWirelessRouteActiveDidChangeNotification object:nil];
[self setBackgroundColor:[UIColor blackColor]];
NSArray *horizontalConstraints;
NSArray *verticalConstraints;
/** Container View **************************************************************************************************/
controllersView = [UIView new];
[controllersView setTranslatesAutoresizingMaskIntoConstraints:NO];
[controllersView setBackgroundColor:[UIColor colorWithWhite:0.0f alpha:0.45f]];
[self addSubview:controllersView];
horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[CV]|"
options:0
metrics:nil
views:@{@"CV" : controllersView}];
verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[CV(40)]|"
options:0
metrics:nil
views:@{@"CV" : controllersView}];
[self addConstraints:horizontalConstraints];
[self addConstraints:verticalConstraints];
/** AirPlay View ****************************************************************************************************/
airPlayLabel = [UILabel new];
[airPlayLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[airPlayLabel setText:@"AirPlay is enabled"];
[airPlayLabel setTextColor:[UIColor lightGrayColor]];
[airPlayLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:13.0f]];
[airPlayLabel setTextAlignment:NSTextAlignmentCenter];
[airPlayLabel setNumberOfLines:0];
[airPlayLabel setHidden:YES];
[self addSubview:airPlayLabel];
horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[AP]|"
options:0
metrics:nil
views:@{@"AP" : airPlayLabel}];
verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[AP]-40-|"
options:0
metrics:nil
views:@{@"AP" : airPlayLabel}];
[self addConstraints:horizontalConstraints];
[self addConstraints:verticalConstraints];
/** UI Controllers **************************************************************************************************/
playButton = [UIButton buttonWithType:UIButtonTypeCustom];
[playButton setTranslatesAutoresizingMaskIntoConstraints:NO];
[playButton setImage:[UIImage imageNamed:@"gui_play"] forState:UIControlStateNormal];
[playButton setImage:[UIImage imageNamed:@"gui_pause"] forState:UIControlStateSelected];
volumeView = [MPVolumeView new];
[volumeView setTranslatesAutoresizingMaskIntoConstraints:NO];
[volumeView setShowsRouteButton:YES];
[volumeView setShowsVolumeSlider:NO];
[volumeView setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
fullscreenButton = [UIButton buttonWithType:UIButtonTypeCustom];
[fullscreenButton setTranslatesAutoresizingMaskIntoConstraints:NO];
[fullscreenButton setImage:[UIImage imageNamed:@"gui_expand"] forState:UIControlStateNormal];
[fullscreenButton setImage:[UIImage imageNamed:@"gui_shrink"] forState:UIControlStateSelected];
currentTimeLabel = [UILabel new];
[currentTimeLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[currentTimeLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:13.0f]];
[currentTimeLabel setTextAlignment:NSTextAlignmentCenter];
[currentTimeLabel setTextColor:[UIColor whiteColor]];
remainingTimeLabel = [UILabel new];
[remainingTimeLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[remainingTimeLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:13.0f]];
[remainingTimeLabel setTextAlignment:NSTextAlignmentCenter];
[remainingTimeLabel setTextColor:[UIColor whiteColor]];
progressIndicator = [GUISlider new];
[progressIndicator setTranslatesAutoresizingMaskIntoConstraints:NO];
[progressIndicator setContinuous:YES];
liveLabel = [UILabel new];
[liveLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[liveLabel setFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:13.0f]];
[liveLabel setTextAlignment:NSTextAlignmentCenter];
[liveLabel setTextColor:[UIColor whiteColor]];
[liveLabel setText:@"Live"];
[liveLabel setHidden:YES];
spacerView = [UIView new];
[spacerView setTranslatesAutoresizingMaskIntoConstraints:NO];
[controllersView addSubview:playButton];
[controllersView addSubview:fullscreenButton];
[controllersView addSubview:volumeView];
[controllersView addSubview:currentTimeLabel];
[controllersView addSubview:progressIndicator];
[controllersView addSubview:remainingTimeLabel];
[controllersView addSubview:liveLabel];
[controllersView addSubview:spacerView];
horizontalConstraints = [NSLayoutConstraint
constraintsWithVisualFormat:@"H:|[P(40)][S(10)][C]-5-[I]-5-[R][F(40)][V(40)]|"
options:0
metrics:nil
views:@{@"P" : playButton,
@"S" : spacerView,
@"C" : currentTimeLabel,
@"I" : progressIndicator,
@"R" : remainingTimeLabel,
@"V" : volumeView,
@"F" : fullscreenButton}];
[controllersView addConstraints:horizontalConstraints];
[volumeView hideByWidth:YES];
[spacerView hideByWidth:YES];
horizontalConstraints = [NSLayoutConstraint
constraintsWithVisualFormat:@"H:|-5-[L]-5-|"
options:0
metrics:nil
views:@{@"L" : liveLabel}];
[controllersView addConstraints:horizontalConstraints];
for (UIView *view in [controllersView subviews]) {
verticalConstraints = [NSLayoutConstraint
constraintsWithVisualFormat:@"V:|-0-[V(40)]"
options:NSLayoutFormatAlignAllCenterY
metrics:nil
views:@{@"V" : view}];
[controllersView addConstraints:verticalConstraints];
}
/** Loading Indicator ***********************************************************************************************/
activityIndicator = [UIActivityIndicatorView new];
[activityIndicator stopAnimating];
CGRect frame = self.frame;
frame.origin = CGPointZero;
[activityIndicator setFrame:frame];
[self addSubview:activityIndicator];
/** Actions Setup ***************************************************************************************************/
[playButton addTarget:self action:@selector(togglePlay:) forControlEvents:UIControlEventTouchUpInside];
[fullscreenButton addTarget:self action:@selector(toggleFullscreen:) forControlEvents:UIControlEventTouchUpInside];
[progressIndicator addTarget:self action:@selector(seek:) forControlEvents:UIControlEventValueChanged];
[progressIndicator addTarget:self action:@selector(pauseRefreshing) forControlEvents:UIControlEventTouchDown];
[progressIndicator addTarget:self action:@selector(resumeRefreshing) forControlEvents:UIControlEventTouchUpInside|
UIControlEventTouchUpOutside];
[self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showControllers)]];
[self showControllers];
controllersTimeoutPeriod = 3;
}
#pragma mark - UI Customization
- (void)setTintColor:(UIColor *)tintColor {
[super setTintColor:tintColor];
[progressIndicator setTintColor:tintColor];
}
- (void)setBufferTintColor:(UIColor *)tintColor {
[progressIndicator setSecondaryTintColor:tintColor];
}
- (void)setLiveStreamText:(NSString *)text {
[liveLabel setText:text];
}
- (void)setAirPlayText:(NSString *)text {
[airPlayLabel setText:text];
}
#pragma mark - Actions
- (void)togglePlay:(UIButton *)button {
if ([button isSelected]) {
[button setSelected:NO];
[player pause];
if ([delegate respondsToSelector:@selector(playerDidPause)]) {
[delegate playerDidPause];
}
} else {
[button setSelected:YES];
[self play];
if ([delegate respondsToSelector:@selector(playerDidResume)]) {
[delegate playerDidResume];
}
}
[self showControllers];
}
- (void)toggleFullscreen:(UIButton *)button {
if (fullscreen) {
if ([delegate respondsToSelector:@selector(playerWillLeaveFullscreen)]) {
[delegate playerWillLeaveFullscreen];
}
[UIView animateWithDuration:0.2f animations:^{
[self setTransform:CGAffineTransformMakeRotation(0)];
[self setFrame:defaultFrame];
CGRect frame = defaultFrame;
frame.origin = CGPointZero;
[playerLayer setFrame:frame];
[activityIndicator setFrame:frame];
} completion:^(BOOL finished) {
fullscreen = NO;
if ([delegate respondsToSelector:@selector(playerDidLeaveFullscreen)]) {
[delegate playerDidLeaveFullscreen];
}
}];
[button setSelected:NO];
} else {
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGFloat width = [[UIScreen mainScreen] bounds].size.width;
CGFloat height = [[UIScreen mainScreen] bounds].size.height;
CGRect frame;
if (UIInterfaceOrientationIsPortrait(orientation)) {
CGFloat aux = width;
width = height;
height = aux;
frame = CGRectMake((height - width) / 2, (width - height) / 2, width, height);
} else {
frame = CGRectMake(0, 0, width, height);
}
if ([delegate respondsToSelector:@selector(playerWillEnterFullscreen)]) {
[delegate playerWillEnterFullscreen];
}
[UIView animateWithDuration:0.2f animations:^{
[self setFrame:frame];
[playerLayer setFrame:CGRectMake(0, 0, width, height)];
[activityIndicator setFrame:CGRectMake(0, 0, width, height)];
if (UIInterfaceOrientationIsPortrait(orientation)) {
[self setTransform:CGAffineTransformMakeRotation(M_PI_2)];
[activityIndicator setTransform:CGAffineTransformMakeRotation(M_PI_2)];
}
} completion:^(BOOL finished) {
fullscreen = YES;
if ([delegate respondsToSelector:@selector(playerDidEnterFullscreen)]) {
[delegate playerDidEnterFullscreen];
}
}];
[button setSelected:YES];
}
[self showControllers];
}
- (void)seek:(UISlider *)slider {
int timescale = currentItem.asset.duration.timescale;
float time = slider.value * (currentItem.asset.duration.value / timescale);
[player seekToTime:CMTimeMakeWithSeconds(time, timescale)];
[self showControllers];
}
- (void)pauseRefreshing {
seeking = YES;
}
- (void)resumeRefreshing {
seeking = NO;
}
- (NSTimeInterval)availableDuration {
NSTimeInterval result = 0;
NSArray *loadedTimeRanges = player.currentItem.loadedTimeRanges;
if ([loadedTimeRanges count] > 0) {
CMTimeRange timeRange = [[loadedTimeRanges objectAtIndex:0] CMTimeRangeValue];
Float64 startSeconds = CMTimeGetSeconds(timeRange.start);
Float64 durationSeconds = CMTimeGetSeconds(timeRange.duration);
result = startSeconds + durationSeconds;
}
return result;
}
- (void)refreshProgressIndicator {
CGFloat duration = CMTimeGetSeconds(currentItem.asset.duration);
if (duration == 0 || isnan(duration)) {
// Video is a live stream
[currentTimeLabel setText:nil];
[remainingTimeLabel setText:nil];
[progressIndicator setHidden:YES];
[liveLabel setHidden:NO];
}
else {
CGFloat current = seeking ?
progressIndicator.value * duration : // If seeking, reflects the position of the slider
CMTimeGetSeconds(player.currentTime); // Otherwise, use the actual video position
[progressIndicator setValue:(current / duration)];
[progressIndicator setSecondaryValue:([self availableDuration] / duration)];
// Set time labels
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:(duration >= 3600 ? @"hh:mm:ss": @"mm:ss")];
NSDate *currentTime = [NSDate dateWithTimeIntervalSince1970:current];
NSDate *remainingTime = [NSDate dateWithTimeIntervalSince1970:(duration - current)];
[currentTimeLabel setText:[formatter stringFromDate:currentTime]];
[remainingTimeLabel setText:[NSString stringWithFormat:@"-%@", [formatter stringFromDate:remainingTime]]];
[progressIndicator setHidden:NO];
[liveLabel setHidden:YES];
}
}
- (void)showControllers {
[UIView animateWithDuration:0.2f animations:^{
[controllersView setAlpha:1.0f];
} completion:^(BOOL finished) {
[controllersTimer invalidate];
if (controllersTimeoutPeriod > 0) {
controllersTimer = [NSTimer scheduledTimerWithTimeInterval:controllersTimeoutPeriod
target:self
selector:@selector(hideControllers)
userInfo:nil
repeats:NO];
}
}];
}
- (void)hideControllers {
[UIView animateWithDuration:0.5f animations:^{
[controllersView setAlpha:0.0f];
}];
}
#pragma mark - Public Methods
- (void)prepareAndPlayAutomatically:(BOOL)playAutomatically {
if (player) {
[self stop];
}
player = [[AVPlayer alloc] initWithPlayerItem:nil];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
NSArray *keys = [NSArray arrayWithObject:@"playable"];
[asset loadValuesAsynchronouslyForKeys:keys completionHandler:^{
currentItem = [AVPlayerItem playerItemWithAsset:asset];
[player replaceCurrentItemWithPlayerItem:currentItem];
if (playAutomatically) {
dispatch_sync(dispatch_get_main_queue(), ^{
[self play];
});
}
}];
[player setAllowsExternalPlayback:YES];
playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
[self.layer addSublayer:playerLayer];
defaultFrame = self.frame;
CGRect frame = self.frame;
frame.origin = CGPointZero;
[playerLayer setFrame:frame];
[self bringSubviewToFront:controllersView];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[player addObserver:self forKeyPath:@"rate" options:0 context:nil];
[currentItem addObserver:self forKeyPath:@"status" options:0 context:nil];
[player seekToTime:kCMTimeZero];
[player setRate:0.0f];
[playButton setSelected:YES];
if (playAutomatically) {
[activityIndicator startAnimating];
}
}
- (void)clean {
[[NSNotificationCenter defaultCenter] removeObserver:self name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:AVPlayerItemFailedToPlayToEndTimeNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:AVPlayerItemPlaybackStalledNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPVolumeViewWirelessRoutesAvailableDidChangeNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPVolumeViewWirelessRouteActiveDidChangeNotification object:nil];
[player setAllowsExternalPlayback:NO];
[self stop];
[player removeObserver:self forKeyPath:@"rate"];
[self setPlayer:nil];
[self setPlayerLayer:nil];
[self removeFromSuperview];
}
- (void)play {
[player play];
[playButton setSelected:YES];
progressTimer = [NSTimer scheduledTimerWithTimeInterval:0.1f
target:self
selector:@selector(refreshProgressIndicator)
userInfo:nil
repeats:YES];
if ([delegate respondsToSelector:@selector(playerDidPlay)]) {
[delegate playerDidPlay];
}
}
- (void)pause {
[player pause];
[playButton setSelected:NO];
if ([delegate respondsToSelector:@selector(playerDidPause)]) {
[delegate playerDidPause];
}
}
- (void)stop {
if (player) {
[player pause];
[player seekToTime:kCMTimeZero];
[playButton setSelected:NO];
}
}
- (BOOL)isPlaying {
return [player rate] > 0.0f;
}
- (void)muteSound: (BOOL) mute {
player.muted = mute;
}
#pragma mark - AV Player Notifications and Observers
- (void)playerDidFinishPlaying:(NSNotification *)notification {
[self stop];
if (fullscreen) {
[self toggleFullscreen:fullscreenButton];
}
if ([delegate respondsToSelector:@selector(playerDidEndPlaying)]) {
[delegate playerDidEndPlaying];
}
}
- (void)playerFailedToPlayToEnd:(NSNotification *)notification {
[self stop];
if ([delegate respondsToSelector:@selector(playerFailedToPlayToEnd)]) {
[delegate playerFailedToPlayToEnd];
}
}
- (void)playerStalled:(NSNotification *)notification {
[self togglePlay:playButton];
if ([delegate respondsToSelector:@selector(playerStalled)]) {
[delegate playerStalled];
}
}
- (void)airPlayAvailabilityChanged:(NSNotification *)notification {
[UIView animateWithDuration:0.4f
animations:^{
if ([volumeView areWirelessRoutesAvailable]) {
[volumeView hideByWidth:NO];
} else if (! [volumeView isWirelessRouteActive]) {
[volumeView hideByWidth:YES];
}
[self layoutIfNeeded];
}];
}
- (void)airPlayActivityChanged:(NSNotification *)notification {
[UIView animateWithDuration:0.4f
animations:^{
if ([volumeView isWirelessRouteActive]) {
if (fullscreen)
[self toggleFullscreen:fullscreenButton];
[playButton hideByWidth:YES];
[fullscreenButton hideByWidth:YES];
[spacerView hideByWidth:NO];
[airPlayLabel setHidden:NO];
controllersTimeoutPeriod = 0;
[self showControllers];
} else {
[playButton hideByWidth:NO];
[fullscreenButton hideByWidth:NO];
[spacerView hideByWidth:YES];
[airPlayLabel setHidden:YES];
controllersTimeoutPeriod = 3;
[self showControllers];
}
[self layoutIfNeeded];
}];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqualToString:@"status"]) {
if (currentItem.status == AVPlayerItemStatusFailed) {
if ([delegate respondsToSelector:@selector(playerFailedToPlayToEnd)]) {
[delegate playerFailedToPlayToEnd];
}
}
}
if ([keyPath isEqualToString:@"rate"]) {
CGFloat rate = [player rate];
if (rate > 0) {
[activityIndicator stopAnimating];
}
}
}
@end
这是我的实施：
NSURL *data = [NSURL URLWithString:url];
self.playerView = (GUIPlayerView *)[staticVideoArray objectAtIndex:i];
[self.playerView setVideoURL:data];
[self.playerView play];
答案 0 :(得分：0)
在- (void)prepareAndPlayAutomatically:(BOOL)playAutomatically函数中添加这一行，它对我有用。
NSString *str1 = videoURL.absoluteString;
NSString *newStr = [str1 substringFromIndex:8];
NSURL *url = [NSURL URLWithString:[newStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil];
NSArray *keys = [NSArray arrayWithObject:@"playable"];