iOS第二天注意和学习重点

//
//  QYViewController.m
//  QYMusicPlayer
//
//  Created by zhangsf on 14-5-17.
//  Copyright (c) 2014年 zhangsf. All rights reserved.
//

#import "QYViewController.h"
#import <AVFoundation/AVFoundation.h>
#import "QYSongsManager.h"
#import "QYSong.h"

@interface QYViewController ()
@property (weak, nonatomic) IBOutlet UISlider *sliderMusicTracker;
@property (weak, nonatomic) IBOutlet UIButton *btnPreMusic;
@property (weak, nonatomic) IBOutlet UIButton *btnPlayMusic;
@property (weak, nonatomic) IBOutlet UIButton *btnNextMusic;
@property (weak, nonatomic) IBOutlet UILabel *labelCurrentTime;
@property (weak, nonatomic) IBOutlet UILabel *labelDuration;
@property (weak, nonatomic) IBOutlet UISlider *sliderMusicVolume;
@property (weak, nonatomic) IBOutlet UITableView *songWordTableView;

@property (strong, nonatomic) NSMutableArray *arraySongName;
@property (strong, nonatomic) NSDictionary *dicSongTimeAndLyric;

@property (strong, nonatomic) NSMutableArray *arrayLyric;
@property (strong, nonatomic) NSArray *currentSongTimes;
@property (assign, nonatomic) NSUInteger currentLineNumber;

@property (strong, nonatomic) QYSong *currentSong;

//计时器， 主要用于控制播放歌典的进度
@property (strong, nonatomic) NSTimer *timerForPlayer;

//标识当前播放歌曲在歌曲列表的位置，主要用于下一首，上一首
@property (nonatomic, assign) NSUInteger currentSongIndex;

@end
//-(void)viewDidload
//{super viewDidload
//self.currentSongIndex =0;
//self.currentLineNumber =0;
//[self.songWordTableView registerClass:[UITableViewCell class] forcellresuseidentifer:@"QYMusicCell"]
//NSString *path=[[NSBundle mainBundle] resourcepath]

//
//
//

@implementation QYViewController

- (void)viewDidLoad
{
[super viewDidLoad];
self.currentSongIndex = 0;//初始化，默认使用第一首歌
self.currentLineNumber = 0;
[self.songWordTableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"QYMusicCell"];

NSString *path = [[NSBundle mainBundle] resourcePath];
[[QYSongsManager sharedQYSongManager] parserSongInfoWithPath:path];

[self resetMusicPlayer];

//初始化音乐进度Slider
[self.sliderMusicTracker setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateNormal];
[self.sliderMusicTracker setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateHighlighted];

//    实始化声音控制Slider
[self.sliderMusicVolume setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateNormal];
[self.sliderMusicVolume setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateHighlighted];
self.sliderMusicVolume.value = 0.3f;
}
#pragma mark -
#pragma mark UITableView Data source

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.arrayLyric.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"QYMusicCell"];
cell.textLabel.font = [UIFont boldSystemFontOfSize:13.0f];
cell.textLabel.text = self.arrayLyric[indexPath.row];
return cell;
}

#pragma mark -
#pragma mark Button callback
- (IBAction)onPlayerVolume:(UISlider*)sender
{
self.musicPlayer.volume = sender.value;
}

- (IBAction)onSliderMusicTracker:(UISlider*)sender
{
self.musicPlayer.currentTime = sender.value * self.musicPlayer.duration;
[self.timerForPlayer invalidate];
self.timerForPlayer = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(onTimer:) userInfo:nil repeats:YES];
}

- (IBAction)onPreMusic:(id)sender
{
self.currentLineNumber = 0;
if ((self.currentSongIndex == 0)) {
self.currentSongIndex = [QYSongsManager sharedQYSongManager].arraySongList.count-1;
}else
{
self.currentSongIndex--;
}
[self resetMusicPlayer];
[self playCurrentSong];
[self.songWordTableView reloadData];
[self updateLyricView];
}

- (IBAction)onNextMusic:(id)sender
{
self.currentLineNumber = 0;
self.currentSongIndex++;
if (self.currentSongIndex > [QYSongsManager sharedQYSongManager].arraySongList.count-1) {
self.currentSongIndex = 0;
}
[self resetMusicPlayer];
[self playCurrentSong];
[self.songWordTableView reloadData];
[self updateLyricView];
}

- (void)resetMusicPlayer
{
self.currentSong = [[[QYSongsManager sharedQYSongManager] arraySongList] objectAtIndex:self.currentSongIndex];
self.currentSongTimes = [[self.currentSong.dicTimeAndLyric allKeys] sortedArrayUsingSelector:@selector(compare:)];
self.arrayLyric = [NSMutableArray arrayWithCapacity:20];

for (int i = 0 ; i < self.currentSongTimes.count; i++) {
NSString *lyric = self.currentSong.dicTimeAndLyric[self.currentSongTimes[i]];
[self.arrayLyric addObject:lyric];
}

NSURL *currentMusicURL = [[NSBundle mainBundle] URLForResource:self.currentSong.name withExtension:@"mp3"];
NSError *error = nil;
self.musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:currentMusicURL  error:&error];
if (error != nil) {
NSLog(@"INIT music player failure.ERROR:%@",error);
return;
}
//    self.sliderMusicTracker.minimumValue = 0.0f;
//    self.sliderMusicTracker.maximumValue = self.musicPlayer.duration;
}

- (IBAction)onPlay:(UIButton*)sender
{
[self playCurrentSong];
}

- (void)playCurrentSong
{
if (![self.musicPlayer isPlaying]) {
[self.musicPlayer play];
self.timerForPlayer = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(onTimer:) userInfo:nil repeats:YES];
[self.btnPlayMusic setBackgroundImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal];
} else {
[self.musicPlayer pause];
[self.timerForPlayer invalidate];
[self.btnPlayMusic setBackgroundImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal];
}

}
- (void)onTimer:(NSTimer*)timer
{

//动态更新进度条时间
if ((int)self.musicPlayer.currentTime % 60 < 10) {
self.labelCurrentTime.text = [NSString stringWithFormat:@"%d:0%d",(int)self.musicPlayer.currentTime / 60, (int)self.musicPlayer.currentTime % 60];
} else {
self.labelCurrentTime.text = [NSString stringWithFormat:@"%d:%d",(int)self.musicPlayer.currentTime / 60, (int)self.musicPlayer.currentTime % 60];
}
//
if ((int)self.musicPlayer.duration % 60 < 10) {
self.labelDuration.text = [NSString stringWithFormat:@"%d:0%d",(int)self.musicPlayer.duration / 60, (int)self.musicPlayer.duration % 60];
} else {
self.labelDuration.text = [NSString stringWithFormat:@"%d:%d",(int)self.musicPlayer.duration / 60, (int)self.musicPlayer.duration % 60];
}

NSLog(@"%f,%f",self.musicPlayer.currentTime,self.musicPlayer.duration);
double result = self.musicPlayer.currentTime / self.musicPlayer.duration;
NSLog(@"result %f",result);
[self.sliderMusicTracker setValue:result animated:YES];
[self updateLyricView];
}

- (void)updateLyricView
{
//如果是最后一行歌词， 需要处理的办法
if (self.currentLineNumber >= self.currentSongTimes.count ) {
self.currentLineNumber= 0;
[self.timerForPlayer invalidate];
[self.musicPlayer stop];
}
else //如果不是最后一行， 则进行的处理
{
double lyricTime = [self.currentSongTimes[self.currentLineNumber] doubleValue];
NSLog(@"lyricTime is %f,currentTime:%f",lyricTime,self.musicPlayer.currentTime);
if (self.musicPlayer.currentTime - lyricTime > 0) {
//            浮点数比较，注意事项
self.currentLineNumber++;
}
}
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.currentLineNumber-1 inSection:0];
[self.songWordTableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionMiddle];

}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end