UIImage*image = [UIImage imageNamed:@"logo"];
float targetHeight = self.navigationController.navigationBar.frame.size.height;
float logoRatio = image.size.width/image.size.height;
float targetWidth = targetHeight * logoRatio;
UIImageView*logoView = [[UIImageView alloc] initWithImage:image];
// X or Y position can not be manipulated because autolayout handles positions.
//[logoView setFrame:CGRectMake((self.navigationController.navigationBar.frame.size.width - targetWidth)/2 , (self.navigationController.navigationBar.frame.size.height - targetHeight)/2 , targetWidth, targetHeight)];
[logoView setFrame:CGRectMake(0, 0, targetWidth, targetHeight)];
self.navigationItem.titleView = logoView;
// How much you pull out the strings and struts, with autolayout, your image will fill the width on navigation bar. So setting only height and content mode is enough/
[logoView setContentMode:UIViewContentModeScaleAspectFit];
/* Autolayout constraints also can not be manipulated since navigation bar has immutable constraints
self.navigationItem.titleView.translatesAutoresizingMaskIntoConstraints = false;
NSDictionary*metricsArray = @{@"width":[NSNumber numberWithFloat:targetWidth],@"height":[NSNumber numberWithFloat:targetHeight],@"margin":[NSNumber numberWithFloat:20]};
NSDictionary*viewsArray = @{@"titleView":self.navigationItem.titleView};
[self.navigationItem.titleView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-(>margin=)-H:[titleView(width)]-(>margin=)-|" options:NSLayoutFormatAlignAllCenterX metrics:metricsArray views:viewsArray]];
[self.navigationItem.titleView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[titleView(height)]" options:0 metrics:metricsArray views:viewsArray]];
NSLog(@"%f", self.navigationItem.titleView.width);
*/
だから私たちは、実際に必要なのはあなたが簡単にIBからそれを行うことができます
UIImage*image = [UIImage imageNamed:@"logo"];
UIImageView*logoView = [[UIImageView alloc] initWithImage:image];
float targetHeight = self.navigationController.navigationBar.frame.size.height;
[logoView setFrame:CGRectMake(0, 0, 0, targetHeight)];
[logoView setContentMode:UIViewContentModeScaleAspectFit];
self.navigationItem.titleView = logoView;
同様の質問に、私は最近、ポストの答え - 私は私の質問で述べたように、これは、http://stackoverflow.com/questions/19878288/ios-custom-shape-navigation-bar – Kuba