我正在尝试在iPhone应用程序中旋转图像,但我无法将其旋转到我需要的特定角度。任何人都可以帮助解决这个问题吗?
#import <UIKit/UIKit.h>
@interface ConsumingWebServicesViewController : UIViewController<UITextFieldDelegate>{
IBOutlet UITextField *username;
IBOutlet UITextField *password;
IBOutlet UITextField *deviceid;
IBOutlet UIActivityIndicatorView *activityindicator;
NSURLConnection *conn;
NSMutableData *webData;
}
@property(nonatomic,retain)UITextField *username;
@property(nonatomic,retain)UITextField *password;
@property(nonatomic,retain)UITextField *deviceid;
@property(nonatomic,retain)UIActivityIndicatorView *activityindicator;
-(IBAction)buttonpressed:(id)sender;
@end
答案 0 :(得分:3)
要旋转任何UIImageView,如果您要求的话可以通过将CGAffineTransformMakeRotation
应用于图像的转换属性来完成。
示例强>
float angleInDegrees = 90; // For example
float angleInRadians = angleInDegrees * (M_PI/180);
myImageView.transform = CGAffineTransformMakeRotation(angleInRadians);
答案 1 :(得分:0)
//如果有人需要swift 3
func rotateImageClockWise(theImage: UIImage,imageView:UIImageView) -> UIImage {
var orient: UIImageOrientation!
let imgOrientation = theImage.imageOrientation
UIView.transition(with: imageView, duration: 0.2, options: .transitionCrossDissolve, animations: {() -> Void in
switch imgOrientation {
case .left:
orient = .up
case .right:
orient = .down
case .up:
orient = .right
case .down:
orient = .left
case .upMirrored:
orient = .rightMirrored
case .downMirrored:
orient = .leftMirrored
case .leftMirrored:
orient = .upMirrored
case .rightMirrored:
orient = .downMirrored
}
}, completion: { _ in })
let rotatedImage = UIImage(cgImage: theImage.cgImage!, scale: 1.0, orientation: orient)
return rotatedImage
}
//只需调用这样的方法:
rotateImageClockWise(theImage:UIImage,imageView:UIImageView)