//
// LrcManager.h
// OC3_歌词解析
//
// Created by zhangxueming on 15/6/15.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "LrcItem.h"
#define FilePath @"/Users/zhangxueming/Desktop/ios1509/Day16_类的复合设计/OC3_歌词解析/传奇.txt"
@interface LrcManager : NSObject
- (
id)initWithFile:(NSString *
)path;
+ (NSString *)userInterface:(
float)aTime;
@end
//
// LrcManager.m
// OC3_歌词解析
//
// Created by zhangxueming on 15/6/15.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import "LrcManager.h"
//匿名类别(类扩展)
//能扩展方法与实例变量,实现了实例变量与方法的私有化
@interface LrcManager ()
{
NSString *_title;
// 歌曲名
NSString *_author;
// 歌词作者
NSMutableArray *_lrcList;
//存lrcItem
}
//解析歌词文件
- (BOOL)parseLrcFile:(NSString *
)path;
//解析歌词标题
- (
void)parseLrcTitle:(NSString *
)lrcString;
//解析歌词演唱者
- (
void)parseLrcAuthor:(NSString *
)lrcString;
//解析歌词词条
- (
void)parseLrcItem:(NSString *
)lrcString;
//将时间字符串转换成浮点时间
- (
float)timeByTimeString:(NSString *
)aString;
@end
@implementation LrcManager
- (
id)initWithFile:(NSString *
)path
{
self =
[super init];
if (self) {
_lrcList =
[NSMutableArray array];
[self parseLrcFile:path];
}
return self;
}
- (BOOL)parseLrcFile:(NSString *
)path
{
//读取歌词文件
NSString *fileContent =
[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
if (!
fileContent) {
return NO;
}
//分割歌词字符串
NSArray *lrcArray = [fileContent componentsSeparatedByString:
@"\n"];
for (NSString *lrcString
in lrcArray) {
if ([lrcString isEqualToString:
@""]) {
continue;
}
else if ([lrcString hasPrefix:
@"[ti:"]) {
[self parseLrcTitle:lrcString];
}
else if ([lrcString hasPrefix:
@"[ar:"])
{
[self parseLrcAuthor:lrcString];
}
else
{
[self parseLrcItem:lrcString];
}
}
//对可变数组排序
[_lrcList sortUsingSelector:@selector(isSortByTime:)];
return YES;
}
- (
void)parseLrcTitle:(NSString *
)lrcString
{
_title = [lrcString substringWithRange:NSMakeRange(
4, [lrcString length]-
5)];
}
- (
void)parseLrcAuthor:(NSString *
)lrcString
{
_author = [lrcString substringWithRange:NSMakeRange(
4, [lrcString length]-
5)];
}
//02:39.90
- (
float)timeByTimeString:(NSString *
)aString
{
NSArray *timeArray = [aString componentsSeparatedByString:
@":"];
return [[timeArray objectAtIndex:
0] intValue]*
60+[[timeArray objectAtIndex:
1] floatValue];
}
- (
void)parseLrcItem:(NSString *
)lrcString
{
NSArray *itemArray = [lrcString componentsSeparatedByString:
@"]"];
NSInteger len =
[itemArray count];
for (NSInteger i=
0; i<len-
1; i++
)
{
LrcItem *item =
[[LrcItem alloc] init];
NSString *timeString = [[itemArray objectAtIndex:i] substringFromIndex:
1];
[item setTime:[self timeByTimeString:timeString]];
[item setLrc:[itemArray lastObject]];
[_lrcList addObject:item];
}
}
//3.5 5.5 8.5 10.5 12.0
+ (NSString *)userInterface:(
float)aTime
{
LrcManager *manager =
[[LrcManager alloc] initWithFile:FilePath];
for (LrcItem *item
in manager->
_lrcList) {
[item printLrcItem];
}
NSInteger len = [manager->
_lrcList count];
NSInteger i;
for (i=
1; i<len; i++
) {
LrcItem *item = [manager->
_lrcList objectAtIndex:i];
if (aTime <
[item time]) {
return [[manager->_lrcList objectAtIndex:i-
1] lrc];
}
}
if (i==
len) {
return [[manager->_lrcList objectAtIndex:i-
1] lrc];
}
return nil;
}
@end
//
// LrcItem.h
// OC3_歌词解析
//
// Created by zhangxueming on 15/6/15.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface LrcItem : NSObject
{
float _time;
NSString *
_lrc;
}
- (
float)time;
- (NSString *
)lrc;
- (
void)setTime:(
float)aTime;
- (
void)setLrc:(NSString *
)aLrc;
- (BOOL)isSortByTime:(LrcItem *
)aItem;
- (
void)printLrcItem;
@end
//
// LrcItem.m
// OC3_歌词解析
//
// Created by zhangxueming on 15/6/15.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import "LrcItem.h"
@implementation LrcItem
- (
float)time
{
return _time;
}
- (NSString *
)lrc
{
return _lrc;
}
- (
void)setTime:(
float)aTime
{
_time =
aTime;
}
- (
void)setLrc:(NSString *
)aLrc
{
_lrc =
aLrc;
}
- (BOOL)isSortByTime:(LrcItem *
)aItem
{
if ([self time] >
[aItem time]) {
return YES;
}
return NO;
}
- (
void)printLrcItem
{
NSLog(@"time = %.2f lrc = %@", [self time], [self lrc]);
}
@end
//
// main.m
// OC3_歌词解析
//
// Created by zhangxueming on 15/6/15.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "LrcManager.h"
int main(
int argc,
const char *
argv[]) {
@autoreleasepool {
float time;
scanf("%f",&
time);
NSLog(@"%@", [LrcManager userInterface:time]);
}
return 0;
}
转载于:https://www.cnblogs.com/0515offer/p/4578835.html
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