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NSString *urlStr = [NSString stringWithFormat:@"%@uploadFileRest/downFile",[AFAppDotNetAPIClient getUrl]];
NSURL *url = [NSURL URLWithString:urlStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
NSString *post = [NSString stringWithFormat:@"contentType=%@&fileName=%@&filePath=%@",model.CONTENT_TYPE,model.FILE_NAME,model.FILE_PATH];
request.HTTPBody = [post dataUsingEncoding:NSUTF8StringEncoding];
NSURLSession *session = [NSURLSession sharedSession];
// 可以不必创建请求直接用url进行获取，但是只能应用于get请求
NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:error.localizedDescription preferredStyle: UIAlertControllerStyleAlert];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction *action) {
}];
[alert addAction:okAction];
//弹出提示框；
[self presentViewController:alert animated:true completion:nil];
}else
{
image1 = [UIImage imageWithData:data];
dispatch_async(dispatch_get_main_queue(), ^
{
// 更UI
UIImageView *imgView1 = [[UIImageView alloc]initWithFrame:CGRectMake(10, 10, 200, 200)];
// imgView.backgroundColor = [UIColor yellowColor];
imgView1.image = image1;
[self.view addSubview:imgView1];
});
}
}];
[task resume];
iOS 下载图片 －当后台返回的数据是文件流而不是图片url
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原文地址：http://www.cnblogs.com/amy54/p/5367788.html
