我正在创建一个需要在所有设备上运行的 iOS 应用程序。创建幻灯片时，我不希望每个设备都有一张图片。我创建了一种生成图像的方法。它需要一个背景图像、主接收器图像和 2 个 UILabel 并相应地缩放。对于所有设备上的纵向方向，它都能完美运行。在 iPad 上，我还需要横向。当我旋转它时出现问题，因为它只是拉伸了图像。我不确定我的视野范围发生了什么。对不起，我的代码太长了。
-(void)viewDidLoad{
_screenSize = self.view.bounds.size;
_slideShowImageArray = [[NSMutableArray alloc] init];
_slideShow = [[NSMutableArray alloc] init];
for (int i = 1; i<=8; i++) {
[_slideShow addObject:[self slideNumber:[NSNumber numberWithInt:i]]];
}
[self generateImages];
_SlideImageView = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y, _screenSize.width, _screenSize.height)];
[[self view]addSubview:_SlideImageView];
[self setSlideNumber:[NSNumber numberWithInt:1]];
[self begin];
}
-(void)begin{
if ([_SlideNumber intValue] <=8) {
UIImage * toImage = [_slideShowImageArray objectAtIndex:[_SlideNumber intValue]-1];
[UIView transitionWithView:self.view
duration:1.0f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
self.SlideImageView.image = toImage;
} completion:^(BOOL finished) {
sleep(2);
[self begin];
}];
int SlideNumber = [_SlideNumber intValue];
int NewSlideNumber = SlideNumber+=1;
[self setSlideNumber:[NSNumber numberWithInt:NewSlideNumber]];
}
}
-(SlideShowObj*) slideNumber:(NSNumber*)number{
SlideShowObj * slideShowOBJ = [[SlideShowObj alloc] init];
UIImageView * counterTempImageView = [[UIImageView alloc]init];
NSString * imageName = [NSString stringWithFormat:@"bg%d.png",[number intValue]];
counterTempImageView.image = [UIImage imageNamed:imageName];
[slideShowOBJ setCounterTopIMG:counterTempImageView];
UIImageView * sinkTempImageView = [[UIImageView alloc]init];
imageName = [NSString stringWithFormat:@"sink%d.png",[number intValue]];
sinkTempImageView.image = [UIImage imageNamed:imageName];
[slideShowOBJ setSinkIMG:sinkTempImageView];
NSString * textAboveSink = @"";
NSString * textBelowSink = @"";
UIColor * textAboveSinkColor = [UIColor blackColor];
UIColor * textBelowSinkColor = [UIColor blackColor];
if ([number intValue]==1) {
textAboveSink = [NSString stringWithFormat:@"8 CAPTIVATING \nCOLORS"];
textBelowSink = [NSString stringWithFormat:@"Anthracite"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}else if ([number intValue]==2) {
textAboveSink = [NSString stringWithFormat:@"TO ENHANCE \nANY DECOR"];
textBelowSink = [NSString stringWithFormat:@"Cinder"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}else if ([number intValue]==3) {
textAboveSink = [NSString stringWithFormat:@"REAL TOUGH,\nFOR REAL LIFE"];
textBelowSink = [NSString stringWithFormat:@"Metallic Grey"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}else if ([number intValue]==4) {
textAboveSink = [NSString stringWithFormat:@"HYGENIC+PLUS \nKEEPS IT CLEAN"];
textBelowSink = [NSString stringWithFormat:@"Café Brown"];
textAboveSinkColor = [UIColor blackColor];
textBelowSinkColor = [UIColor blackColor];
}else if ([number intValue]==5) {
textAboveSink = [NSString stringWithFormat:@"HEAT PROOF \nACID RESISTANT"];
textBelowSink = [NSString stringWithFormat:@"Truffle"];
textAboveSinkColor = [UIColor blackColor];
textBelowSinkColor = [UIColor blackColor];
}else if ([number intValue]==6) {
textAboveSink = [NSString stringWithFormat:@"SCRATCH RESISTANT \nSTAIN RESISTANT"];
textBelowSink = [NSString stringWithFormat:@"Biscotti"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}else if ([number intValue]==7) {
textAboveSink = [NSString stringWithFormat:@"NON-FADING \nKEEPS IT CLEAN"];
textBelowSink = [NSString stringWithFormat:@"Biscuit"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}else if ([number intValue]==8) {
textAboveSink = [NSString stringWithFormat:@"FOR THE LIFE \nOF THE SINK"];
textBelowSink = [NSString stringWithFormat:@"White"];
textAboveSinkColor = [UIColor whiteColor];
textBelowSinkColor = [UIColor whiteColor];
}
[slideShowOBJ setTopTextColor:textAboveSinkColor];
[slideShowOBJ setBottomTextColor:textBelowSinkColor];
[slideShowOBJ setTopText:textAboveSink];
[slideShowOBJ setBottomText:textBelowSink];
return slideShowOBJ;
}
-(void)generateImages{
for (int i = 1; i<=8; i++) {
UIImage * bgImage = [[(SlideShowObj*)[_slideShow objectAtIndex:i-1]counterTopIMG]image];
//find out the width and height ratio of your image.
double ratio = bgImage.size.width / bgImage.size.height;
//determine the calculate width according the height. here height is set as mainScreen.
double calculatedWidth = ratio * _screenSize.height;
UIImageView * bgImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, calculatedWidth, _screenSize.height)];
[[self view] addSubview:bgImageView];
bgImageView.image = [[(SlideShowObj*)[_slideShow objectAtIndex:i-1]counterTopIMG]image];
UIImage * image = [[(SlideShowObj*)[_slideShow objectAtIndex:i-1]sinkIMG]image];
//find out the width and height ratio of your image.
double ratio1 = image.size.width / image.size.height;
//determine the calculate width according the height. here height is set as mainScreen.
double calculatedWidth1 = ratio1 * (_screenSize.height)*.5;
double calculatedheight1 = ratio1 * _screenSize.width*.5;
UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(_screenSize.width/2-calculatedWidth1/2, ((_screenSize.height)/2-calculatedheight1/2)*1.3, calculatedWidth1, calculatedheight1)];
[[self view] addSubview:imageView];
imageView.image = [[(SlideShowObj*)[_slideShow objectAtIndex:i-1]sinkIMG]image];
[imageView setContentMode:UIViewContentModeScaleAspectFit];
UIFont *helvFont28 = [UIFont fontWithName:@"Helvetica" size:28.0];
UIFont *helvFont24 = [UIFont fontWithName:@"Helvetica" size:24.0];
UILabel * topText = [[UILabel alloc] initWithFrame:CGRectMake(0, (_screenSize.height)/2-(_screenSize.height)*.4, _screenSize.width, 100)];
[topText setNumberOfLines:2];
[topText setFont:helvFont28];
[topText setTextAlignment:NSTextAlignmentCenter];
[topText setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alpha:.2]];
[topText setTextColor:[(SlideShowObj*)[_slideShow objectAtIndex:i-1]topTextColor]];
[[self view]addSubview:topText];
[topText setText:[(SlideShowObj*)[_slideShow objectAtIndex:i-1]topText]];
UILabel * bottomText = [[UILabel alloc] initWithFrame:CGRectMake(0, (_screenSize.height)/2+(_screenSize.height)*.3, _screenSize.width, 40)];
[bottomText setFont:helvFont24];
[bottomText setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alpha:.2]];
[[self view]addSubview:bottomText];
[bottomText setText:[(SlideShowObj*)[_slideShow objectAtIndex:i-1]bottomText]];
[bottomText setTextAlignment:NSTextAlignmentCenter];
[bottomText setTextColor:[(SlideShowObj*)[_slideShow objectAtIndex:i-1]bottomTextColor]];
UIGraphicsBeginImageContext(_screenSize);
CGContextRef context = UIGraphicsGetCurrentContext();
[[[self view]layer] renderInContext:context];
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
NSLog(@"%f,%f",theImage.size.width, theImage.size.height);
[_slideShowImageArray addObject:theImage];
UIGraphicsEndImageContext();
[bottomText removeFromSuperview];
[topText removeFromSuperview];
[imageView removeFromSuperview];
[bgImageView removeFromSuperview];
}
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
[self reload];
}
-(void)reload{
[_SlideImageView setFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y, _screenSize.width, _screenSize.height)];
[_slideShow removeAllObjects];
[_slideShow removeAllObjects];
for (int i = 1; i<=8; i++) {
[_slideShow addObject:[self slideNumber:[NSNumber numberWithInt:i]]];
}
[self generateImages];
[self setSlideNumber:[NSNumber numberWithInt:1]];
[self begin];
}