IOS网络同步请求

    //1.目标地址

    NSString *url_string = @"http://b33.photo.store.qq.com/psu?/05ded9dc-1001-4be2-b975-13e05bbe8a74/YQttQ6aq57DdFXI99mxZ1KO.MbUmc5tp7ltg8Vi1E4A!/b/YQEyvBMZvgAAYvh1zgrXSAAA&a=33&b=18&bo=4AGAAgAAAAABAEQ!&rf=photoDetail/psu.jpeg";

    //2.构造网络地址

    NSURL *url = [NSURL URLWithString:url_string];

    //3.构造网络请求

    NSURLRequest *request = [NSURLRequestrequestWithURL:url];

    //4.构造缓冲区,把数据放进去

    NSData *data = [NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:nil];

    //5.把缓冲区的东西放进image里

    UIImage *image = [[UIImagealloc] initWithData:data];

    //6.设置图片的布局

    self.imageView.contentMode = UIViewContentModeRedraw;

    //7.将网络请求的数据，显示到imageView里

    self.imageView.image = image;