如何获取适合于当前屏幕分辨率的LaunchImage

CGSize viewSize = self.window.bounds.size;

NSString *viewOrientation = @"Portrait";//横屏请设置成 @"Landscape"

NSString *launchImage = nil;

NSArray* imagesDict = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"UILaunchImages"];

for(NSDictionary* dict in imagesDict)

{

CGSize imageSize = CGSizeFromString(dict[@"UILaunchImageSize"]);

if(CGSizeEqualToSize(imageSize, viewSize) && [viewOrientation isEqualToString:dict[@"UILaunchImageOrientation"]])

{

launchImage = dict[@"UILaunchImageName"];

}

}

UIImageView *launchView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:launchImage]];

launchView.frame = self.window.bounds;

launchView.contentMode = UIViewContentModeScaleAspectFill;

[self.window addSubview:launchView];

[UIView animateWithDuration:2.0f

delay:0.0f

options:UIViewAnimationOptionBeginFromCurrentState

animations:^{

launchView.alpha = 0.0f;

launchView.layer.transform = CATransform3DScale(CATransform3DIdentity, 1.2, 1.2, 1);

}

completion:^(BOOLfinished) {

[launchView removeFromSuperview];

}];