在半屏上添加UIViewController

Question

我想添加一個我創建的UIViewController，但我希望它是屏幕尺寸的一半。

我使用這個代碼：

myController *tmController = [[myControlleralloc] initWithNibName:@"myController" bundle:nil]; 
    tmController .view.frame = CGRectMake(10, 100, 100, 100); 
    [appDelegate.viewController presentModalViewController:tmController animated:YES]; 

，但我看到這一切在屏幕上，什麼是黃我的代碼？

Answer 1

您好您可以按類別文件實現這一.....

.h文件中：

#define kSemiModalAnimationDuration 0.5 
#define kSemiModalDidShowNotification @"kSemiModalDidShowNotification" 
#define kSemiModalDidHideNotification @"kSemiModalDidHideNotification" 
#define kSemiModalWasResizedNotification @"kSemiModalWasResizedNotification" 
@interface UIViewController (KNSemiModal) 

-(void)presentSemiViewController:(UIViewController*)vc; 
-(void)presentSemiView:(UIView*)vc; 
-(void)dismissSemiModalView; 
-(void)resizeSemiView:(CGSize)newSize; 

@end 

.m文件：

#import "UIViewController+KNSemiModal.h" 
    #import <QuartzCore/QuartzCore.h> 

    @interface UIViewController (KNSemiModalInternal) 
    -(UIView*)parentTarget; 
    -(CAAnimationGroup*)animationGroupForward:(BOOL)_forward; 
    @end 

    @implementation UIViewController (KNSemiModalInternal) 

    -(UIView*)parentTarget { 
     // To make it work with UINav & UITabbar as well 
     UIViewController * target = self; 
     while (target.parentViewController != nil) { 
     target = target.parentViewController; 
     } 
     return target.view; 
    } 

    -(CAAnimationGroup*)animationGroupForward:(BOOL)_forward { 
     // Create animation keys, forwards and backwards 
     CATransform3D t1 = CATransform3DIdentity; 
     t1.m34 = 1.0/-900; 
     t1 = CATransform3DScale(t1, 0.95, 0.95, 1); 
     t1 = CATransform3DRotate(t1, 15.0f*M_PI/180.0f, 1, 0, 0); 

     CATransform3D t2 = CATransform3DIdentity; 
     t2.m34 = t1.m34; 
     t2 = CATransform3DTranslate(t2, 0, [self parentTarget].frame.size.height*-0.08, 0); 
     t2 = CATransform3DScale(t2, 0.8, 0.8, 1); 

     CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"]; 
     animation.toValue = [NSValue valueWithCATransform3D:t1]; 
     animation.duration = kSemiModalAnimationDuration/2; 
     animation.fillMode = kCAFillModeForwards; 
     animation.removedOnCompletion = NO; 
     [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]]; 

     CABasicAnimation *animation2 = [CABasicAnimation animationWithKeyPath:@"transform"]; 
     animation2.toValue = [NSValue valueWithCATransform3D:(_forward?t2:CATransform3DIdentity)]; 
     animation2.beginTime = animation.duration; 
     animation2.duration = animation.duration; 
     animation2.fillMode = kCAFillModeForwards; 
     animation2.removedOnCompletion = NO; 

     CAAnimationGroup *group = [CAAnimationGroup animation]; 
     group.fillMode = kCAFillModeForwards; 
     group.removedOnCompletion = NO; 
     [group setDuration:animation.duration*2]; 
     [group setAnimations:[NSArray arrayWithObjects:animation,animation2, nil]]; 
     return group; 
    } 
    @end 

    @implementation UIViewController (KNSemiModal) 

    -(void)presentSemiViewController:(UIViewController*)vc { 
     [self presentSemiView:vc.view]; 
    } 

    -(void)presentSemiView:(UIView*)view { 
     // Determine target 
     UIView * target = [self parentTarget]; 

     if (![target.subviews containsObject:view]) { 
     // Calulate all frames 
     CGRect sf = view.frame; 
     CGRect vf = target.frame; 
     CGRect f = CGRectMake(0, vf.size.height-sf.size.height, vf.size.width, sf.size.height); 
     CGRect of = CGRectMake(0, 0, vf.size.width, vf.size.height-sf.size.height); 

     // Add semi overlay 
     UIView * overlay = [[UIView alloc] initWithFrame:target.bounds]; 
     overlay.backgroundColor = [UIColor blackColor]; 

     // Take screenshot and scale 
     UIGraphicsBeginImageContextWithOptions(target.bounds.size, YES, [[UIScreen mainScreen] scale]); 
     [target.layer renderInContext:UIGraphicsGetCurrentContext()]; 
     UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIImageView * ss = [[UIImageView alloc] initWithImage:image]; 
     [overlay addSubview:ss]; 
     [target addSubview:overlay]; 

     // Dismiss button 
     // Don't use UITapGestureRecognizer to avoid complex handling 
     UIButton * dismissButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
     [dismissButton addTarget:self action:@selector(dismissSemiModalView) forControlEvents:UIControlEventTouchUpInside]; 
     dismissButton.backgroundColor = [UIColor clearColor]; 
     dismissButton.frame = of; 
     [overlay addSubview:dismissButton]; 

     // Begin overlay animation 
     [ss.layer addAnimation:[self animationGroupForward:YES] forKey:@"pushedBackAnimation"]; 
     [UIView animateWithDuration:kSemiModalAnimationDuration animations:^{ 
      ss.alpha = 0.5; 
     }]; 

     // Present view animated 
     view.frame = CGRectMake(0, vf.size.height, vf.size.width, sf.size.height); 
     [target addSubview:view]; 
     view.layer.shadowColor = [[UIColor blackColor] CGColor]; 
     view.layer.shadowOffset = CGSizeMake(0, -2); 
     view.layer.shadowRadius = 5.0; 
     view.layer.shadowOpacity = 0.8; 
     view.layer.shouldRasterize = YES; 
     view.layer.rasterizationScale = [[UIScreen mainScreen] scale]; 
     UIBezierPath *path = [UIBezierPath bezierPathWithRect:view.bounds]; 
     view.layer.shadowPath = path.CGPath; 

     [UIView animateWithDuration:kSemiModalAnimationDuration animations:^{ 
      view.frame = f; 
     } completion:^(BOOL finished) { 
      if(finished){ 
      [[NSNotificationCenter defaultCenter] postNotificationName:kSemiModalDidShowNotification 
                   object:self]; 
      } 
     }]; 
     } 
    } 

    -(void)dismissSemiModalView { 
     UIView * target = [self parentTarget]; 
     UIView * modal = [target.subviews objectAtIndex:target.subviews.count-1]; 
     UIView * overlay = [target.subviews objectAtIndex:target.subviews.count-2]; 
     [UIView animateWithDuration:kSemiModalAnimationDuration animations:^{ 
     modal.frame = CGRectMake(0, target.frame.size.height, modal.frame.size.width, modal.frame.size.height); 
     } completion:^(BOOL finished) { 
     [overlay removeFromSuperview]; 
     [modal removeFromSuperview]; 
     }]; 

     // Begin overlay animation 
     UIImageView * ss = (UIImageView*)[overlay.subviews objectAtIndex:0]; 
     [ss.layer addAnimation:[self animationGroupForward:NO] forKey:@"bringForwardAnimation"]; 
     [UIView animateWithDuration:kSemiModalAnimationDuration animations:^{ 
     ss.alpha = 1; 
     } completion:^(BOOL finished) { 
     if(finished){ 
      [[NSNotificationCenter defaultCenter] postNotificationName:kSemiModalDidHideNotification 
                   object:self]; 
     } 
     }]; 
    } 

    - (void)resizeSemiView:(CGSize)newSize { 
     UIView * target = [self parentTarget]; 
     UIView * modal = [target.subviews objectAtIndex:target.subviews.count-1]; 
     CGRect mf = modal.frame; 
     mf.size.width = newSize.width; 
     mf.size.height = newSize.height; 
     mf.origin.y = target.frame.size.height - mf.size.height; 
     UIView * overlay = [target.subviews objectAtIndex:target.subviews.count-2]; 
     UIButton * button = [[overlay subviews] objectAtIndex:1]; 
     CGRect bf = button.frame; 
     bf.size.height = overlay.frame.size.height - newSize.height; 
     [UIView animateWithDuration:kSemiModalAnimationDuration animations:^{ 
     modal.frame = mf; 
     button.frame = bf; 
     } completion:^(BOOL finished) { 
     if(finished){ 
      [[NSNotificationCenter defaultCenter] postNotificationName:kSemiModalWasResizedNotification 
                   object:self]; 
     } 
     }]; 
    } 

    @end 

    #pragma mark - 

    // Convenient category method to find actual ViewController that contains a view 
    // Adapted from: http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone 

    @implementation UIView (FindUIViewController) 
    - (UIViewController *) containingViewController { 
     UIView * target = self.superview ? self.superview : self; 
     return (UIViewController *)[target traverseResponderChainForUIViewController]; 
    } 

    - (id) traverseResponderChainForUIViewController { 
     id nextResponder = [self nextResponder]; 
     BOOL isViewController = [nextResponder isKindOfClass:[UIViewController class]]; 
     BOOL isTabBarController = [nextResponder isKindOfClass:[UITabBarController class]]; 
     if (isViewController && !isTabBarController) { 
     return nextResponder; 
     } else if(isTabBarController){ 
     UITabBarController *tabBarController = nextResponder; 
     return [tabBarController selectedViewController]; 
     } else if ([nextResponder isKindOfClass:[UIView class]]) { 
     return [nextResponder traverseResponderChainForUIViewController]; 
     } else { 
     return nil; 
     } 
    } 

    @end 

#pragma mark - 

// Convenient category method to find actual ViewController that contains a view 
// Adapted from: http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone 

@implementation UIView (FindUIViewController) 
- (UIViewController *) containingViewController { 
    UIView * target = self.superview ? self.superview : self; 
    return (UIViewController *)[target traverseResponderChainForUIViewController]; 
} 

- (id) traverseResponderChainForUIViewController { 
    id nextResponder = [self nextResponder]; 
    BOOL isViewController = [nextResponder isKindOfClass:[UIViewController class]]; 
    BOOL isTabBarController = [nextResponder isKindOfClass:[UITabBarController class]]; 
    if (isViewController && !isTabBarController) { 
    return nextResponder; 
    } else if(isTabBarController){ 
    UITabBarController *tabBarController = nextResponder; 
    return [tabBarController selectedViewController]; 
    } else if ([nextResponder isKindOfClass:[UIView class]]) { 
    return [nextResponder traverseResponderChainForUIViewController]; 
    } else { 
    return nil; 
    } 
} 

@end 

和呼叫聲明....

KNFirstViewController *view=[[KNFirstViewController alloc]init]; 
    [self presentSemiView:view.view]; 

查看示例項目Here