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 <UIKit/UIKit.h>
@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正常使用的源码:
//
// RootViewController.m
// ImagePicker
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "RootViewController.h"
#import "DemoButton.h"
#import "UIImage+ImagePickerCrop.h"
@interface RootViewController ()<DemoButtonDelegate, UIScrollViewDelegate, UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@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];
}
// -------------------------------------------------------------------------------------- //
/*
<UIScrollViewDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
*/
// 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 *)picker
didFinishPickingMediaWithInfo:(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.
