我们再看看它们的回调方法，代码：

- (void)requestFinished:(ASIHTTPRequest *)request

{

NSData *data = [request responseData];

NSError *eror;

NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data

options:NSJSONReadingAllowFragments error:&eror];

if (!resDict) {

UIImage *img = [UIImage imageWithData:data];

if (request.tag ==1) {                                                

①

_imageView1.image = img;

} else {

_imageView2.image = img;

}

} else {

NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"];

NSString *errorStr = [resultCodeObj errorMessage];

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@”错误信息”

message:errorStr

delegate:nil

cancelButtonTitle:@”OK”