NSURLConnection获取一个MP3文件
NSURLConnection网络请求
- 直接上代码-这个没什么说的,你们自己有兴趣可以自己试试
代码
#import "ViewController.h"
@interface ViewController ()<NSURLConnectionDataDelegate>
//一个可变的data,因为NSURLConnection代理方法下载数据是分段下的,不信大家可以试试
@property (nonatomic,strong) NSMutableData *data;
@end
@implementation ViewController
#pragma mark -getter and setter methods
- (NSMutableData *)data
{
if (!_data) {
_data = [NSMutableData data];
}
return _data;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *urlString = @"http://192.168.1.68/丁香花.mp3";
//如果url中有中文,需要把它转换成百分比占位符
urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlString];
//NSURLRequestUseProtocolCachePolicy 自动缓存策略
// 超时时间 默认是60s 一般设置为10 - 30 秒之间
NSURLRequest *requst = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:15];
//建立连接 NSURLConnection需要手动开启
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:requst delegate:self];
[connection start];
}
//服务器返回信息
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"%@",response);
}
// 客户端在服务器下载数据 - 数据一次只能下一点
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.data appendData:data];
NSLog(@"%@",data);
}
//完成
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[self.data writeToFile:@"/Users/mac/Desktop/丁香花.mp3" atomically:YES];
NSLog(@"下载完成");
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
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