iOS 简单实现app增加广告页 (附效果图和demo)

demo地址[https://github.com/shabake/GHGHAddADV]

0.先去缓存找图片,如果有图片直接显示在advImage在,如果没有图片就去下载.

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"loading.png"]];
    
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDir = FALSE;
BOOL isExit = [fileManager fileExistsAtPath:filePath isDirectory:&isDir];
if (isExit) {
  _advImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, screen_width, screen_height)];
  [_advImage setImage:[UIImage imageWithContentsOfFile:filePath]];
  [self.window addSubview:_advImage];
   [self performSelector:@selector(removeAdvImage) withObject:nil afterDelay:3];
}else{
             dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
   [self loadData];
   });
}

1.图片显示1秒后利用transform做动画移除advImage

 [UIView animateWithDuration:1.0f animations:^{
        _advImage.transform = CGAffineTransformMakeScale(0.1f, 0.1f);
        _advImage.alpha = 0.f;
    } completion:^(BOOL finished) {
        [_advImage removeFromSuperview];
    }];