Ios 不使用PickerVIew的图像裁剪_Ios_Objective C_Uiimageview

Ios 不使用PickerVIew的图像裁剪

ios objective-c

Ios 不使用PickerVIew的图像裁剪,ios,objective-c,uiimageview,Ios,Objective C,Uiimageview,我想将图像裁剪为特定大小。用户应该能够将图像移动到所需位置，然后单击裁剪按钮当我在谷歌上搜索时，我只找到了用户从PickerController中选择图像的图像裁剪代码示例。我不想使用picker crontroller来选择一个图像，然后对其进行裁剪我已经准备好在UIImageView中加载一个图像，现在我想点击裁剪按钮，在那里会出现一个网格，这样用户就可以将图像移动到他想要的地方，以便裁剪它有人能帮我吗我的代码如下：但它使用了我不想使用的pickerView控制器 - (void)i

我想将图像裁剪为特定大小。用户应该能够将图像移动到所需位置，然后单击裁剪按钮

当我在谷歌上搜索时，我只找到了用户从PickerController中选择图像的图像裁剪代码示例。我不想使用picker crontroller来选择一个图像，然后对其进行裁剪

我已经准备好在

UIImageView

中加载一个图像，现在我想点击裁剪按钮，在那里会出现一个网格，这样用户就可以将图像移动到他想要的地方，以便裁剪它

有人能帮我吗

我的代码如下：但它使用了我不想使用的

pickerView

控制器

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {

    [picker dismissModalViewControllerAnimated:YES];



    pictureImageView.image = image;

    CGSize size = [pictureImageView.image size];

    CGRect cropRect = CGRectMake(0.0, 0.0, size.width, size.height);

    NSValue *cropRectValue = [editingInfo objectForKey:@"UIImagePickerControllerCropRect"];

    cropRect = [cropRectValue CGRectValue];

    UIImageWriteToSavedPhotosAlbum(pictureImageView.image, self, nil, nil);

}

@lllep

对于图像裁剪，我使用了下面的代码，可能对您有所帮助，这是XIB的附加图像

在.h文件中

#import <QuartzCore/QuartzCore.h>
#import <AssetsLibrary/AssetsLibrary.h>

@interface ImageCropViewController : UIViewController<UIImagePickerControllerDelegate, UINavigationControllerDelegate, UIScrollViewDelegate, UIScrollViewAccessibilityDelegate,UIGestureRecognizerDelegate>
{

     IBOutlet UIView * vwPictureOptions, *vwHeaderView;
     IBOutlet UIImageView * ivPicture;
     IBOutlet UIScrollView * svScroller;
     IBOutlet UIButton * btnCrop, * btnNew, * btnSet, * btnDelete;
     IBOutlet UILabel * lblTitle;
     IBOutlet UIActivityIndicatorView * aiLoader;
    BOOL isImage;
    IBOutlet UIView *viewHideBottom;
    IBOutlet UIView *viewHideRight;
}

@property (nonatomic, strong) UIImage * iPicture;
@property (nonatomic) BOOL hasCurrentImage, isProfileImage;
@property (nonatomic, retain) UIImageView * iPickedPicture;
@property (nonatomic, retain) UIImage * imgSelectedPicture;

#import "ImageCropViewController.h"
#import "AppDelegate.h"
#import <AVFoundation/AVFoundation.h>
#include <CoreFoundation/CoreFoundation.h>

@interface ImageCropViewController ()

@end

@implementation ImageCropViewController

@synthesize imgSelectedPicture;

- (void)viewDidLoad {
  [super viewDidLoad];
    vwHeaderView.backgroundColor = [UIColor colorWithRed:104/255.0 green:149/255.0 blue:204/255.0 alpha:0.97];
    ivPicture.layer.borderWidth =  2.0;
    ivPicture.layer.borderColor = [UIColor whiteColor].CGColor; //SetColorRGB(104, 149, 204).CGColor;
    //[self setSwipeGesture];
}

-(void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:YES];

    CGRect frame =ivPicture.frame;
    frame.size.height = frame.size.width;
    //frame.size.width = APP_DELEGATE.window.frame.size.width;
    ivPicture.frame = frame;

    frame =svScroller.frame;
   // frame.size.height = APP_DELEGATE.window.frame.size.width;
    frame.size.height = frame.size.width;
    svScroller.frame = frame;

    frame = viewHideBottom.frame;
    frame.origin.y = ivPicture.frame.origin.y+ivPicture.frame.size.height;
    frame.origin.x = 0;
    frame.size.width = APP_DELEGATE.window.frame.size.width;
    frame.size.height = APP_DELEGATE.window.frame.size.height - frame.origin.y-46;
    viewHideBottom.frame = frame;

    frame = viewHideRight.frame;
    frame.origin.x = ivPicture.frame.origin.x+ivPicture.frame.size.width;
    viewHideRight.frame = frame;

    [self modifyImage];
}


-(void)modifyImage {
    if (self.iPickedPicture) {
        [self.iPickedPicture removeFromSuperview];
    }
    self.iPickedPicture = [[UIImageView alloc]initWithImage:imgSelectedPicture];
    //Pankaj modification
    svScroller.minimumZoomScale = MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height);
    svScroller.maximumZoomScale = MAX(MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height),1.0);
    svScroller.zoomScale = MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height );
    [svScroller setContentSize:CGSizeMake(self.iPickedPicture.frame.size.width, self.iPickedPicture.frame.size.height)];
    [svScroller addSubview:self.iPickedPicture];
    //self.iPickedPicture.center = svScroller.center
    [self.view bringSubviewToFront:vwHeaderView];
    [self.view bringSubviewToFront:btnCrop];
    HUDHIDE;
}



-(IBAction)btnCropPressed:(id)sender {
    HUDSHOWWITHTEXT(@"Loading");
    svScroller.layer.borderWidth = 0.0;

    CGRect visibleRect;
    float zoomScale = (1.0 / svScroller.zoomScale);
    visibleRect.origin = svScroller.contentOffset;
    visibleRect.size = svScroller.frame.size;

    visibleRect.origin.x = fabsf(svScroller.contentOffset.x * zoomScale);
    visibleRect.origin.y = fabsf(svScroller.contentOffset.y * zoomScale);
    visibleRect.size.width = fabsf(svScroller.frame.size.width * zoomScale);
    visibleRect.size.height = fabsf(svScroller.frame.size.height * zoomScale);

    UIGraphicsBeginImageContextWithOptions(visibleRect.size,NO,svScroller.zoomScale);
    [self.iPickedPicture.image drawAtPoint:CGPointMake(-visibleRect.origin.x, -visibleRect.origin.y)
                                 blendMode:kCGBlendModeNormal
                                     alpha:1.0];
    UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    self.iPickedPicture = [[UIImageView alloc]initWithImage:croppedImage];
    ivPicture.image = self.iPickedPicture.image;
    if (self.iPickedPicture) {
        [self.iPickedPicture removeFromSuperview];
    }
    //ivPicture.backgroundColor = [UIColor redColor];
    svScroller.hidden = true;
    ivPicture.hidden = NO;
    self.iPickedPicture.hidden = YES;
    APP_DELEGATE.imgCroppedImage = croppedImage;
    [self performSelector:@selector(btnBackPressed:) withObject:sender afterDelay:1.0];
}

-(UIView *)viewForZoomingInScrollView:(UIScrollView *)inScroll {
    return self.iPickedPicture;
}

#导入
#进口
@界面图像CropViewController:UIViewController
{
IBUIView*vwPictureOptions，*vwHeaderView；
IBUIImageView*ivPicture；
IBMUIScrollView*svScroller；
IBUI按钮*btnCrop、*btnNew、*btnSet、*btnDelete；
IBUILabel*lblTitle；
IBUIOutlet活动指示器视图*装载机；
布尔·伊斯梅；
IBUIVIEW*viewHideBottom；
IBUIView*ViewHiderRight；
}
@属性（非原子，强）UIImage*IPacture；
@属性（非原子）BOOL hasCurrentImage、isProfileImage；
@属性（非原子，保留）UIImageView*iPickedPicture；
@属性（非原子，保留）UIImage*imgSelectedPicture；

在.m文件中

#import <QuartzCore/QuartzCore.h>
#import <AssetsLibrary/AssetsLibrary.h>

@interface ImageCropViewController : UIViewController<UIImagePickerControllerDelegate, UINavigationControllerDelegate, UIScrollViewDelegate, UIScrollViewAccessibilityDelegate,UIGestureRecognizerDelegate>
{

     IBOutlet UIView * vwPictureOptions, *vwHeaderView;
     IBOutlet UIImageView * ivPicture;
     IBOutlet UIScrollView * svScroller;
     IBOutlet UIButton * btnCrop, * btnNew, * btnSet, * btnDelete;
     IBOutlet UILabel * lblTitle;
     IBOutlet UIActivityIndicatorView * aiLoader;
    BOOL isImage;
    IBOutlet UIView *viewHideBottom;
    IBOutlet UIView *viewHideRight;
}

@property (nonatomic, strong) UIImage * iPicture;
@property (nonatomic) BOOL hasCurrentImage, isProfileImage;
@property (nonatomic, retain) UIImageView * iPickedPicture;
@property (nonatomic, retain) UIImage * imgSelectedPicture;

#import "ImageCropViewController.h"
#import "AppDelegate.h"
#import <AVFoundation/AVFoundation.h>
#include <CoreFoundation/CoreFoundation.h>

@interface ImageCropViewController ()

@end

@implementation ImageCropViewController

@synthesize imgSelectedPicture;

- (void)viewDidLoad {
  [super viewDidLoad];
    vwHeaderView.backgroundColor = [UIColor colorWithRed:104/255.0 green:149/255.0 blue:204/255.0 alpha:0.97];
    ivPicture.layer.borderWidth =  2.0;
    ivPicture.layer.borderColor = [UIColor whiteColor].CGColor; //SetColorRGB(104, 149, 204).CGColor;
    //[self setSwipeGesture];
}

-(void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:YES];

    CGRect frame =ivPicture.frame;
    frame.size.height = frame.size.width;
    //frame.size.width = APP_DELEGATE.window.frame.size.width;
    ivPicture.frame = frame;

    frame =svScroller.frame;
   // frame.size.height = APP_DELEGATE.window.frame.size.width;
    frame.size.height = frame.size.width;
    svScroller.frame = frame;

    frame = viewHideBottom.frame;
    frame.origin.y = ivPicture.frame.origin.y+ivPicture.frame.size.height;
    frame.origin.x = 0;
    frame.size.width = APP_DELEGATE.window.frame.size.width;
    frame.size.height = APP_DELEGATE.window.frame.size.height - frame.origin.y-46;
    viewHideBottom.frame = frame;

    frame = viewHideRight.frame;
    frame.origin.x = ivPicture.frame.origin.x+ivPicture.frame.size.width;
    viewHideRight.frame = frame;

    [self modifyImage];
}


-(void)modifyImage {
    if (self.iPickedPicture) {
        [self.iPickedPicture removeFromSuperview];
    }
    self.iPickedPicture = [[UIImageView alloc]initWithImage:imgSelectedPicture];
    //Pankaj modification
    svScroller.minimumZoomScale = MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height);
    svScroller.maximumZoomScale = MAX(MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height),1.0);
    svScroller.zoomScale = MAX(svScroller.bounds.size.width / self.iPickedPicture.image.size.width, svScroller.bounds.size.height / self.iPickedPicture.image.size.height );
    [svScroller setContentSize:CGSizeMake(self.iPickedPicture.frame.size.width, self.iPickedPicture.frame.size.height)];
    [svScroller addSubview:self.iPickedPicture];
    //self.iPickedPicture.center = svScroller.center
    [self.view bringSubviewToFront:vwHeaderView];
    [self.view bringSubviewToFront:btnCrop];
    HUDHIDE;
}



-(IBAction)btnCropPressed:(id)sender {
    HUDSHOWWITHTEXT(@"Loading");
    svScroller.layer.borderWidth = 0.0;

    CGRect visibleRect;
    float zoomScale = (1.0 / svScroller.zoomScale);
    visibleRect.origin = svScroller.contentOffset;
    visibleRect.size = svScroller.frame.size;

    visibleRect.origin.x = fabsf(svScroller.contentOffset.x * zoomScale);
    visibleRect.origin.y = fabsf(svScroller.contentOffset.y * zoomScale);
    visibleRect.size.width = fabsf(svScroller.frame.size.width * zoomScale);
    visibleRect.size.height = fabsf(svScroller.frame.size.height * zoomScale);

    UIGraphicsBeginImageContextWithOptions(visibleRect.size,NO,svScroller.zoomScale);
    [self.iPickedPicture.image drawAtPoint:CGPointMake(-visibleRect.origin.x, -visibleRect.origin.y)
                                 blendMode:kCGBlendModeNormal
                                     alpha:1.0];
    UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    self.iPickedPicture = [[UIImageView alloc]initWithImage:croppedImage];
    ivPicture.image = self.iPickedPicture.image;
    if (self.iPickedPicture) {
        [self.iPickedPicture removeFromSuperview];
    }
    //ivPicture.backgroundColor = [UIColor redColor];
    svScroller.hidden = true;
    ivPicture.hidden = NO;
    self.iPickedPicture.hidden = YES;
    APP_DELEGATE.imgCroppedImage = croppedImage;
    [self performSelector:@selector(btnBackPressed:) withObject:sender afterDelay:1.0];
}

-(UIView *)viewForZoomingInScrollView:(UIScrollView *)inScroll {
    return self.iPickedPicture;
}

#导入“ImageCropViewController.h”
#导入“AppDelegate.h”
#进口
#包括
@接口映像CropViewController（）
@结束
@实现ImageCropViewController
@合成所选图像；
-（无效）viewDidLoad{
[超级视图下载]；
vwHeaderView.backgroundColor=[uicolorWithred:104/255.0绿色：149/255.0蓝色：204/255.0阿尔法：0.97]；
ivPicture.layer.borderWidth=2.0；
ivPicture.layer.borderColor=[UIColor whiteColor].CGColor；//SetColorRGB（104、149、204）.CGColor；
//[自我姿态]；
}
-（无效）视图显示：（BOOL）动画{
[超级视图显示：是]；
CGRect frame=ivPicture.frame；
frame.size.height=frame.size.width；
//frame.size.width=APP_DELEGATE.window.frame.size.width；
ivPicture.frame=帧；
frame=svScroller.frame；
//frame.size.height=APP_DELEGATE.window.frame.size.width；
frame.size.height=frame.size.width；
svScroller.frame=frame；
frame=viewHideBottom.frame；
frame.origin.y=ivPicture.frame.origin.y+ivPicture.frame.size.height；
frame.origin.x=0；
frame.size.width=APP_DELEGATE.window.frame.size.width；
frame.size.height=APP_DELEGATE.window.frame.size.height-frame.origin.y-46；
viewHideBottom.frame=帧；
frame=viewHiderRight.frame；
frame.origin.x=ivPicture.frame.origin.x+ivPicture.frame.size.width；
viewHiderRight.frame=帧；
[自修改图像]；
}
-（无效）修改图像{
if（自拍iPickedPicture）{
[self.iPickedPicture从SuperView中移除]；
}
self.iPickedPicture=[[UIImageView alloc]initWithImage:imgSelectedPicture]；
//Pankaj修改
svScroller.minimumZoomScale=MAX（svScroller.bounds.size.width/self.iPickedPicture.image.size.width、svScroller.bounds.size.height/self.iPickedPicture.image.size.height）；
svScroller.maximumZoomScale=MAX（MAX（svScroller.bounds.size.width/self.iPickedPicture.image.size.width，svScroller.bounds.size.height/self.iPickedPicture.image.size.height），1.0）；
svScroller.zoomScale=MAX（svScroller.bounds.size.width/self.iPickedPicture.image.size.width，svScroller.bounds.size.height/self.iPickedPicture.image.size.height）；
[svScroller setContentSize:CGSizeMake（self.iPickedPicture.frame.size.width，self.iPickedPicture.frame.size.height）]；
[svScroller addSubview:self.iPickedPicture]；
//self.iPickedPicture.center=svScroller.center
[self.view将子视图带到前面：vwHeaderView]；
[self.view-bringsubview-tofront:btnCrop]；
哈得皮；
}
-（iAction）Btncruppressed:（id）发件人{
HUD显示文本（@“加载”）；
svScroller.layer.borderWidth=0.0；
CGRect visibleRect；
float zoomScale=（1.0/svScroller.zoomScale）；
visibleRect.origin=svScroller.contentOffset；
visibleRect.size=svScroller.frame.size；
visibleRect.origin.x=fabsf（svScroller.contentOffset.x*zoomScale）；
visibleRect.origin.y=fabsf（svScroller.contentOffset.y*zoomScale）；
visibleRect.size.width=fabsf（svScroller.frame.size.width*zoomScale）；
visibleRect.size.height=fabsf（svScroller.frame.size.height*zoomScale）；
UIGraphicsBeginImageContextWithOptions（visibleRect.size、NO、svScroller.zoomScale）；
[self.iPickedPicture.image drawAtPoint:CGPointMake（-visibleRect.origin.x，-visibleRect.origin.y）
blendMode:kCGBlendModeNormal
α：1.0]；
UIImage*croppedImage=UIGraphicsGetImageFromCurrentImageContext（）；
UIGraphicsSendImageContext（）；
self.iPickedPicture=[[UIImageView alloc]initWithImage:cropeImage]；
ivPicture.image=self.iPickedPicture.image；
if（自拍iPickedPicture）{
[self.iPickedPicture从SuperView中移除]；
}
//ivPicture.backgroundColor=[UIColor redColor]；
svScroller.hidden=true；
ivPicture.hidden=否；
self.iPickedPicture.hidden=是；
APP_DELEGATE.imgCroppedImage=裁剪图像；
[自执行选择器：@selector（btnBackPressed:）with object:sender afterDelay:1.0]；
}
-（UIView*）视图用于缩放缩略视图：（UIScrollView*）缩略视图{
返回self.ipackedpicture；
}

你能解释一下吗。我不明白这是怎么做到的。@lllep，好的，首先看看我的代码，我有一个serone scrollview（svScroller）&设置一个ImageView（iPickedPicture），现在scrollview被设置为ZOOM，所以在那之后，你想裁剪多少设置ZOOM