ios界面切换和网络加载导致界面卡顿问题

，测试了下，没发现加载延迟的，或许是你下载的图片太大了？

• (void)viewDidLoad

{

[super viewDidLoad];

UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.baidu.com/img/baidu_jgylogo3.gif"]]];

CGRect imageframe = CGRectMake(0, 0, img.size.width, img.size.height);

UIImageView * imageview = [[UIImageView alloc] initWithFrame:imageframe];

                                                                     [imageview setImage:img];

[self.view addSubview:imageview];

}这个是我在第二个页面写的。你参考下