gistfile1.txt

UIImage *image = [UIImage imageNamed:@"hoge.png"];
UIImageView *view = [[UIImageView alloc] initWithImage:image];
[view scaleToSize:image.size];

UIView+LKViewUtil.m

#import "UIView+LKViewUtil.h"
#import "LKMacro.h"
#import <QuartzCore/QuartzCore.h>

@implementation UIView (LKViewUtil)

- (void)centerizeInRect:(CGRect)rect
{
    self.frame = CGRectMake((rect.size.width - self.frame.size.width)/2.0,
                            (rect.size.height - self.frame.size.height)/2.0,
                            self.frame.size.width,
                            self.frame.size.height);
}

- (void)centerizeInWidth:(CGFloat)width
{
    self.frame = CGRectMake((width - self.frame.size.width)/2.0,
                            self.frame.origin.y,
                            self.frame.size.width,
                            self.frame.size.height);
}

- (void)centerizeInHeight:(CGFloat)height
{
    self.frame = CGRectMake(self.frame.origin.x,
                            (height - self.frame.size.height)/2.0,
                            self.frame.size.width,
                            self.frame.size.height);
}

- (void)scaleToSize:(CGSize)size
{
    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, size.width, size.height);
}
- (void)scaleToW:(CGFloat)w H:(CGFloat)h
{
    self.frame = CGRectMake(self.frame.origin.x,self.frame.origin.y,w,h);
}

- (void)scaleToW:(CGFloat)w
{
    self.frame = CGRectMake(self.frame.origin.x,self.frame.origin.y,w,self.frame.size.height);
}

- (void)scaleToH:(CGFloat)h
{
    self.frame = CGRectMake(self.frame.origin.x,self.frame.origin.y,self.frame.size.width,h);
}

- (void)moveByX:(CGFloat)x Y:(CGFloat)y
{
    self.frame = CGRectMake(self.frame.origin.x + x,
                            self.frame.origin.y + y,
                            self.frame.size.width,
                            self.frame.size.height);
}

- (void)moveBy:(CGPoint)offset
{
    self.frame = CGRectMake(self.frame.origin.x + offset.x,
                            self.frame.origin.y + offset.y,
                            self.frame.size.width,
                            self.frame.size.height);
}

- (void)moveToX:(CGFloat)x
{
    self.frame = CGRectMake(x, self.frame.origin.y, self.frame.size.width, self.frame.size.height);
}

- (void)moveToY:(CGFloat)y
{
    self.frame = CGRectMake(self.frame.origin.x, y, self.frame.size.width, self.frame.size.height);
}

- (void)moveToX:(CGFloat)x Y:(CGFloat)y
{
    self.frame = CGRectMake(x, y, self.frame.size.width, self.frame.size.height);
}

- (void)moveTo:(CGPoint)point
{
    self.frame = CGRectMake(point.x, point.y, self.frame.size.width, self.frame.size.height);
}

- (void)pulsateWithDuration:(CGFloat)duration
                      count:(NSInteger)count
{
    self.alpha = 0.0;
    __weak typeof(self) wself = self;
    [UIView animateWithDuration:duration
                          delay:0.0
                        options:UIViewAnimationOptionRepeat|UIViewAnimationOptionCurveLinear
                     animations:^{
        [UIView setAnimationRepeatCount:count];
        [UIView setAnimationRepeatAutoreverses:YES];
         wself.alpha = 1.0;
     } completion:^(BOOL finished) {
         //[wself cancelPulsatingWithDuration:duration];
     }];
}

- (void)cancelPulsatingWithDuration:(CGFloat)duration
{
    __weak typeof(self) wself = self;
    [UIView animateWithDuration:duration
                          delay:0.1
                        options:UIViewAnimationOptionBeginFromCurrentState|UIViewAnimationOptionCurveEaseOut
                     animations:^{
                         [UIView setAnimationRepeatCount:1];
                         wself.alpha = 1.0;
                     } completion:^(BOOL finished) {
                         
                     }];
}

- (void)shadowWithColor:(UIColor *)color
                 radius:(CGFloat)radius
                 offset:(CGSize)offset
                opacity:(CGFloat)opacity
{
    //wrap.backgroundColor = [UIColor clearColor];
    self.layer.shadowColor = color.CGColor;
    self.layer.shadowRadius = radius;
    self.layer.shadowOffset = offset;
    self.layer.shadowOpacity = opacity;
    self.layer.shadowPath =
    [UIBezierPath bezierPathWithRoundedRect:self.bounds
                               cornerRadius:self.layer.cornerRadius].CGPath;
    self.layer.shouldRasterize = YES;
    self.layer.rasterizationScale = [UIScreen mainScreen].scale;
    self.layer.contentsScale = [UIScreen mainScreen].scale;
}

+ (UIView *)shadowViewWrappingView:(UIView *)view
                         withColor:(UIColor *)color
                            radius:(CGFloat)radius
                            offset:(CGSize)offset
                           opacity:(CGFloat)opacity
{
    /*
    view.layer.masksToBounds = YES;
    view.layer.opaque = NO;
    view.layer.cornerRadius = cornerRadius;
    */
    view.frame = (CGRect){CGPointZero, view.bounds.size};
    UIView *wrap = [[[UIView alloc] initWithFrame:view.bounds] autorelease];
    wrap.backgroundColor = [UIColor clearColor];
    wrap.layer.shadowColor = color.CGColor;
    wrap.layer.shadowRadius = radius;
    wrap.layer.shadowOffset = offset;
    wrap.layer.shadowOpacity = opacity;
    wrap.layer.shadowPath = 
        [UIBezierPath bezierPathWithRoundedRect:view.bounds 
                                   cornerRadius:view.layer.cornerRadius].CGPath;
    wrap.layer.shouldRasterize = YES;
    wrap.layer.rasterizationScale = [UIScreen mainScreen].scale;
    wrap.layer.contentsScale = [UIScreen mainScreen].scale;
    [wrap addSubview:view];
    return wrap;
}

- (UIImage*)screenshot
{
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 0.0);
    [self.layer renderInContext: UIGraphicsGetCurrentContext()];
    UIImage *ss = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return ss;
}

// borrowed from triaina
- (UIViewController *)viewController
{
    for (UIView *next = [self superview]; next; next = next.superview) {
        UIResponder *nextResponder = [next nextResponder];
        if ([nextResponder isKindOfClass:[UIViewController class]]) {
            return (UIViewController *)nextResponder;
        }
    }
    return nil;
}

@end