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| #import "ViewController.h"
#import "DACircularProgressView.h"
@interface ViewController ()<NSURLConnectionDataDelegate>
@property(nonatomic,strong) NSMutableData *fileData;
@property(nonatomic,assign) long long totalLength; //文件的长度
@property (weak, nonatomic) IBOutlet UIProgressView *progressView;
@property(nonatomic,weak) DACircularProgressView *circleView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
DACircularProgressView *circleView=[[DACircularProgressView alloc]init];
circleView.frame=CGRectMake(100, 100, 100, 100);
circleView.trackTintColor=[UIColor blueColor];
circleView.progressTintColor=[UIColor redColor];
circleView.progress=0.0;
[self.view addSubview:circleView];
self.circleView=circleView;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self download];
}
-(void)download
{
//1-URL
NSURL *url=[NSURL URLWithString:@"http://localhost:8080//MJServer/resources/videos.zip"];
//2-请求
NSURLRequest *request=[NSURLRequest requestWithURL:url];
//3-下载
[NSURLConnection connectionWithRequest:request delegate:self];
}
#pragma 代理方法
//-请求失败时调用(请求超时，网络异常)
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"didFailWithError--");
}
//-接收到服务器的响应聚会调用
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"didReceiveResponse--");
self.fileData=[NSMutableData data];
//取出文件的总长度
NSHTTPURLResponse *resp=(NSHTTPURLResponse *)response;
//NSLog(@"%@",resp.allHeaderFields);
long long fileLength=[resp.allHeaderFields[@"Content-Length"] longLongValue];
//NSLog(@"%lld",fileLength);
//NSLog(@"%lld",response.expectedContentLength);
self.totalLength=response.expectedContentLength;
}
//当接收到服务器返回到实体数据时调用(具体内容，这个内容可被调用多次)
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
//static int total=0;
//total+=data.length;
//NSLog(@"didReceiveData--%d---%d",data.length,total);
[self.fileData appendData:data];
//self.progressView.progress=(double)self.fileData.length/self.totalLength;
self.circleView.progress=(double)self.fileData.length/self.totalLength;
}
//加载完毕后调用(服务器的数据已经完全返回后)
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"connectionDidFinishLoading--");
//写入到沙盒中
NSString *cache= [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
NSString *file=[cache stringByAppendingPathComponent:@"videos.zip"];
[self.fileData writeToFile:file atomically:YES];
}
@end
|
