打开图片选择器并裁减图片取出图片

效果:

源码:

图片切割源码:

UIImage+ImagePickerCrop.h 与 UIImage+ImagePickerCrop.m

////  UIImage+ImagePickerCrop.h//  ImagePickerCropDemo////  Created by Frank Schmitt on 4/1/14.//  Copyright (c) 2014 Frank Schmitt. See LICENSE. //#import 
    
     @interface UIImage (ImagePickerCrop)+ (UIImage *)croppedImageWithImagePickerInfo:(NSDictionary *)info;@end
    

////  UIImage+ImagePickerCrop.m//  ImagePickerCropDemo////  Created by Frank Schmitt on 4/1/14.//  Copyright (c) 2014 Frank Schmitt. See LICENSE. //#import "UIImage+ImagePickerCrop.h"@implementation UIImage (ImagePickerCrop)+ (UIImage *)croppedImageWithImagePickerInfo:(NSDictionary *)info {    UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];    CGRect cropRect = [[info objectForKey:UIImagePickerControllerCropRect] CGRectValue];    CGAffineTransform rotateTransform = CGAffineTransformIdentity;        switch (originalImage.imageOrientation) {        case UIImageOrientationDown:            rotateTransform = CGAffineTransformRotate(rotateTransform, M_PI);            rotateTransform = CGAffineTransformTranslate(rotateTransform, -originalImage.size.width, -originalImage.size.height);            break;                    case UIImageOrientationLeft:            rotateTransform = CGAffineTransformRotate(rotateTransform, M_PI_2);            rotateTransform = CGAffineTransformTranslate(rotateTransform, 0.0, -originalImage.size.height);            break;                    case UIImageOrientationRight:            rotateTransform = CGAffineTransformRotate(rotateTransform, -M_PI_2);            rotateTransform = CGAffineTransformTranslate(rotateTransform, -originalImage.size.width, 0.0);            break;                    default:            break;    }        CGRect rotatedCropRect = CGRectApplyAffineTransform(cropRect, rotateTransform);        CGImageRef croppedImage = CGImageCreateWithImageInRect([originalImage CGImage], rotatedCropRect);    UIImage *result = [UIImage imageWithCGImage:croppedImage scale:[UIScreen mainScreen].scale orientation:originalImage.imageOrientation];    CGImageRelease(croppedImage);        return result;}@end

////  RootViewController.m//  ImagePicker////  Copyright (c) 2014年 Y.X. All rights reserved.//#import "RootViewController.h"#import "DemoButton.h"#import "UIImage+ImagePickerCrop.h"@interface RootViewController ()
    
     @end@implementation RootViewController- (void)viewDidLoad{    [super viewDidLoad];        DemoButton *button = [[DemoButton alloc] initWithFrame:CGRectMake(0, 0, 170, 45)                                                     title:@"YouXianMing"];    button.delegate    = self;    button.center      = self.view.center;    [self.view addSubview:button];}// -------------------------------------------------------------------------------------- ///*    
     
      */// 推出进入图片库- (void)displayImagePickerPhotoLibrary{    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];        imagePicker.delegate             = self;    imagePicker.sourceType           = UIImagePickerControllerSourceTypePhotoLibrary;    imagePicker.allowsEditing        = YES; // 允许编辑    imagePicker.modalTransitionStyle = UIModalTransitionStyleCoverVertical;        if ([self isKindOfClass:[UIViewController class]])    {        // 推出控制器        [self presentViewController:imagePicker                           animated:YES                         completion:nil];    }    else    {        NSLog(@"不是控制器");    }}// 推出进入照相机- (void)displayImagePickerCamera{    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];        imagePicker.delegate             = self;    imagePicker.sourceType           = UIImagePickerControllerSourceTypeCamera;    imagePicker.allowsEditing        = YES; // 允许编辑    imagePicker.modalTransitionStyle = UIModalTransitionStyleCoverVertical;        if ([self isKindOfClass:[UIViewController class]])    {        // 推出控制器        [self presentViewController:imagePicker                           animated:YES                         completion:nil];    }    else    {        NSLog(@"不是控制器");    }}// 代理- (void)imagePickerController:(UIImagePickerController *)pickerdidFinishPickingMediaWithInfo:(NSDictionary *)info{    [self dismissViewControllerAnimated:YES                             completion:nil];        // 获取到了图片    UIImage *tmpImage = [UIImage croppedImageWithImagePickerInfo:info];    NSLog(@"%@", NSStringFromCGSize(tmpImage.size));}// -------------------------------------------------------------------------------------- //- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{    if (buttonIndex == actionSheet.cancelButtonIndex)    {        return;    }        if (buttonIndex == 0)    {        [self displayImagePickerCamera];    }    else if (buttonIndex == 1)    {        [self displayImagePickerPhotoLibrary];    }}#pragma mark - 按钮代理- (void)demoButtonEvent:(DemoButton *)button{    UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"您要上传头像?"                                                       delegate:self                                              cancelButtonTitle:@"取消"                                         destructiveButtonTitle:nil                                              otherButtonTitles:@"拍照", @"选择已有图片", nil];    [sheet showInView:self.view];}@end
     
    

注意哦,这些都是需要在真机环境下测试的呢,还有,那个DemoButton是我自己写的类,需要你自行替换掉才行呢.

有几个代理是需要引入的.

当然,要知道,这个UIImagePickerController是可以定制的.