准备加入裁剪功能,初步搭建代码

TZImagePickerController.podspec

 Pod::Spec.new do |s|
   s.name         = "TZImagePickerController"
-  s.version      = "1.7.0"
+  s.version      = "1.7.1"
   s.summary      = "A clone of UIImagePickerController, support picking multiple photos、original photo and video"
   s.homepage     = "https://github.com/banchichen/TZImagePickerController"
   s.license      = "MIT"
   s.author       = { "banchichen" => "tanzhenios@foxmail.com" }
   s.platform     = :ios
   s.ios.deployment_target = "6.0"
-  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.7.0" }
+  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.7.1" }
   s.requires_arc = true
   s.resources    = "TZImagePickerController/TZImagePickerController/*.{png,xib,nib,bundle}"
   s.source_files = "TZImagePickerController/TZImagePickerController/*.{h,m}"

TZImagePickerController/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.7.1</string>
+	<string>1.7.2</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

TZImagePickerController/TZImagePickerController/TZAssetCell.h

@@ -29,7 +29,7 @@ typedef enum : NSUInteger {
 @property (nonatomic, copy) NSString *photoSelImageName;
 @property (nonatomic, copy) NSString *photoDefImageName;
 
-@property (nonatomic, assign) NSInteger maxImagesCount;
+@property (nonatomic, assign) BOOL showSelectBtn;
 
 @end
 

TZImagePickerController/TZImagePickerController/TZAssetCell.m

@@ -77,13 +77,13 @@
     }
 }
 
-- (void)setMaxImagesCount:(NSInteger)maxImagesCount {
-    _maxImagesCount = maxImagesCount;
+- (void)setShowSelectBtn:(BOOL)showSelectBtn {
+    _showSelectBtn = showSelectBtn;
     if (!self.selectPhotoButton.hidden) {
-        self.selectPhotoButton.hidden = maxImagesCount == 1;
+        self.selectPhotoButton.hidden = !showSelectBtn;
     }
     if (!self.selectImageView.hidden) {
-        self.selectImageView.hidden = maxImagesCount == 1;
+        self.selectImageView.hidden = !showSelectBtn;
     }
 }
 

TZImagePickerController/TZImagePickerController/TZImagePickerController.h

@@ -4,7 +4,7 @@
 //
 //  Created by 谭真 on 15/12/24.
 //  Copyright © 2015年 谭真. All rights reserved.
-//  version 1.7.1 - 2016.10.18
+//  version 1.7.2 - 2016.12.2
 
 /*
  经过测试，比起xib的方式，把TZAssetCell改用纯代码的方式来写，滑动帧数明显提高了（约提高10帧左右）
@@ -92,6 +92,12 @@
 /// 隐藏不可以选中的图片，默认是NO，不推荐将其设置为YES
 @property (nonatomic, assign) BOOL hideWhenCanNotSelect;
 
+/// Single selection mode, valid when maxImagesCount = 1
+/// 单选模式,maxImagesCount为1时才生效
+@property (nonatomic, assign) BOOL showSelectBtn; ///< 在单选模式下，照片列表页中，显示选择按钮,默认为NO
+@property (nonatomic, assign) BOOL allowCrop;     ///< 允许裁剪,默认为YES，showSelectBtn为NO才生效
+@property (nonatomic, assign) CGRect cropRect;    ///< 裁剪框的尺寸
+
 - (void)showAlertWithTitle:(NSString *)title;
 - (void)showProgressHUD;
 - (void)hideProgressHUD;

TZImagePickerController/TZImagePickerController/TZImagePickerController.m

@@ -4,7 +4,7 @@
 //
 //  Created by 谭真 on 15/12/24.
 //  Copyright © 2015年 谭真. All rights reserved.
-//  version 1.7.1 - 2016.10.18
+//  version 1.7.2 - 2016.12.2
 
 #import "TZImagePickerController.h"
 #import "TZPhotoPickerController.h"
@@ -174,7 +174,7 @@
         previewVc.photos = [NSMutableArray arrayWithArray:selectedPhotos];
         previewVc.currentIndex = index;
         __weak typeof(self) weakSelf = self;
-        [previewVc setOkButtonClickBlockWithPreviewType:^(NSArray<UIImage *> *photos, NSArray *assets, BOOL isSelectOriginalPhoto) {
+        [previewVc setDoneButtonClickBlockWithPreviewType:^(NSArray<UIImage *> *photos, NSArray *assets, BOOL isSelectOriginalPhoto) {
             if (weakSelf.didFinishPickingPhotosHandle) {
                 weakSelf.didFinishPickingPhotosHandle(photos,assets,isSelectOriginalPhoto);
             }
@@ -274,6 +274,36 @@
     }
 }
 
+- (void)setMaxImagesCount:(NSInteger)maxImagesCount {
+    _maxImagesCount = maxImagesCount;
+    if (maxImagesCount > 1) {
+        _showSelectBtn = YES;
+    }
+}
+
+- (void)setShowSelectBtn:(BOOL)showSelectBtn {
+    _showSelectBtn = showSelectBtn;
+    // 多选模式下，不允许让showSelectBtn为NO
+    if (!showSelectBtn && _maxImagesCount > 1) {
+        _showSelectBtn = YES;
+    }
+}
+
+- (void)setAllowCrop:(BOOL)allowCrop {
+    _allowCrop = allowCrop;
+    if (allowCrop) { // 允许裁剪的时候，不能选原图
+        self.allowPickingOriginalPhoto = NO;
+    }
+}
+
+- (CGRect)cropRect {
+    if (_cropRect.size.width > 0) {
+        return _cropRect;
+    }
+    CGFloat cropViewWH = self.view.tz_width - 2;
+    return CGRectMake(1, (self.view.tz_height - self.view.tz_width) / 2, cropViewWH, cropViewWH);
+}
+
 - (void)setTimeout:(NSInteger)timeout {
     _timeout = timeout;
     if (timeout < 5) {
@@ -440,6 +470,7 @@
     if (imagePickerVc.autoDismiss) {
         [self.navigationController dismissViewControllerAnimated:YES completion:nil];
     }
+    // 兼容旧版本
     if ([imagePickerVc.pickerDelegate respondsToSelector:@selector(imagePickerControllerDidCancel:)]) {
         [imagePickerVc.pickerDelegate imagePickerControllerDidCancel:imagePickerVc];
     }

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -121,7 +121,7 @@ static CGSize AssetGridThumbnailSize;
     layout.minimumLineSpacing = margin;
     CGFloat top = 44;
     if (iOS7Later) top += 20;
-    CGFloat collectionViewHeight = tzImagePickerVc.maxImagesCount > 1 ? self.view.tz_height - 50 - top : self.view.tz_height - top;
+    CGFloat collectionViewHeight = tzImagePickerVc.showSelectBtn ? self.view.tz_height - 50 - top : self.view.tz_height - top;
     _collectionView = [[TZCollectionView alloc] initWithFrame:CGRectMake(0, top, self.view.tz_width, collectionViewHeight) collectionViewLayout:layout];
     _collectionView.backgroundColor = [UIColor whiteColor];
     _collectionView.dataSource = self;
@@ -160,7 +160,7 @@ static CGSize AssetGridThumbnailSize;
 
 - (void)configBottomToolBar {
     TZImagePickerController *tzImagePickerVc = (TZImagePickerController *)self.navigationController;
-    if (tzImagePickerVc.maxImagesCount <= 1) return;
+    if (!tzImagePickerVc.showSelectBtn) return;
     
     UIView *bottomToolBar = [[UIView alloc] initWithFrame:CGRectMake(0, self.view.tz_height - 50, self.view.tz_width, 50)];
     CGFloat rgb = 253 / 255.0;
@@ -170,7 +170,7 @@ static CGSize AssetGridThumbnailSize;
     CGFloat previewWidth = [previewText boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX) options:NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:16]} context:nil].size.width;
     _previewButton = [UIButton buttonWithType:UIButtonTypeCustom];
     _previewButton.frame = CGRectMake(10, 3, previewWidth + 2, 44);
-    _previewButton.tz_width = tzImagePickerVc.maxImagesCount <= 1 ? 0 : previewWidth + 2;
+    _previewButton.tz_width = !tzImagePickerVc.showSelectBtn ? 0 : previewWidth + 2;
     [_previewButton addTarget:self action:@selector(previewButtonClick) forControlEvents:UIControlEventTouchUpInside];
     _previewButton.titleLabel.font = [UIFont systemFontOfSize:16];
     [_previewButton setTitle:previewText forState:UIControlStateNormal];
@@ -362,7 +362,7 @@ static CGSize AssetGridThumbnailSize;
         model = _models[indexPath.row - 1];
     }
     cell.model = model;
-    cell.maxImagesCount = tzImagePickerVc.maxImagesCount;
+    cell.showSelectBtn = tzImagePickerVc.showSelectBtn;
     
     __weak typeof(cell) weakCell = cell;
     __weak typeof(self) weakSelf = self;
@@ -482,15 +482,18 @@ static CGSize AssetGridThumbnailSize;
 - (void)pushPhotoPrevireViewController:(TZPhotoPreviewController *)photoPreviewVc {
     __weak typeof(self) weakSelf = self;
     photoPreviewVc.isSelectOriginalPhoto = _isSelectOriginalPhoto;
-    photoPreviewVc.backButtonClickBlock = ^(BOOL isSelectOriginalPhoto) {
+    [photoPreviewVc setBackButtonClickBlock:^(BOOL isSelectOriginalPhoto) {
         weakSelf.isSelectOriginalPhoto = isSelectOriginalPhoto;
         [weakSelf.collectionView reloadData];
         [weakSelf refreshBottomToolBarStatus];
-    };
-    photoPreviewVc.okButtonClickBlock = ^(BOOL isSelectOriginalPhoto){
+    }];
+    [photoPreviewVc setDoneButtonClickBlock:^(BOOL isSelectOriginalPhoto) {
         weakSelf.isSelectOriginalPhoto = isSelectOriginalPhoto;
         [weakSelf okButtonClick];
-    };
+    }];
+    [photoPreviewVc setDoneButtonClickBlockCropMode:^(UIImage *cropedImage, id asset) {
+        [weakSelf didGetAllPhotos:@[cropedImage] assets:@[asset] infoArr:nil];
+    }];
     [self.navigationController pushViewController:photoPreviewVc animated:YES];
 }
 

TZImagePickerController/TZImagePickerController/TZPhotoPreviewCell.h

@@ -14,6 +14,13 @@
 @property (nonatomic, strong) TZAssetModel *model;
 @property (nonatomic, copy) void (^singleTapGestureBlock)();
 
+@property (nonatomic, strong) UIImageView *imageView;
+@property (nonatomic, strong) UIScrollView *scrollView;
+@property (nonatomic, strong) UIView *imageContainerView;
+
+@property (nonatomic, assign) BOOL allowCrop;
+@property (nonatomic, assign) CGRect cropRect;
+
 - (void)recoverSubviews;
 
 @end

TZImagePickerController/TZImagePickerController/TZPhotoPreviewCell.m

@@ -14,9 +14,6 @@
 @interface TZPhotoPreviewCell ()<UIGestureRecognizerDelegate,UIScrollViewDelegate> {
     CGFloat _aspectRatio;
 }
-@property (nonatomic, strong) UIScrollView *scrollView;
-@property (nonatomic, strong) UIImageView *imageView;
-@property (nonatomic, strong) UIView *imageContainerView;
 @end
 
 @implementation TZPhotoPreviewCell
@@ -43,10 +40,12 @@
         
         _imageContainerView = [[UIView alloc] init];
         _imageContainerView.clipsToBounds = YES;
+        _imageContainerView.contentMode = UIViewContentModeScaleAspectFill;
         [_scrollView addSubview:_imageContainerView];
         
         _imageView = [[UIImageView alloc] init];
         _imageView.backgroundColor = [UIColor colorWithWhite:1.000 alpha:0.500];
+        _imageView.contentMode = UIViewContentModeScaleAspectFill;
         _imageView.clipsToBounds = YES;
         [_imageContainerView addSubview:_imageView];
         
@@ -91,7 +90,12 @@
     if (_imageContainerView.tz_height > self.tz_height && _imageContainerView.tz_height - self.tz_height <= 1) {
         _imageContainerView.tz_height = self.tz_height;
     }
-    _scrollView.contentSize = CGSizeMake(self.scrollView.tz_width, MAX(_imageContainerView.tz_height, self.tz_height));
+    CGFloat contentSizeH = MAX(_imageContainerView.tz_height, self.tz_height);
+    if (_allowCrop) {
+        _scrollView.contentSize = CGSizeMake(self.scrollView.tz_width, contentSizeH);
+    } else {
+        _scrollView.contentSize = CGSizeMake(self.scrollView.tz_width, contentSizeH);
+    }
     [_scrollView scrollRectToVisible:self.bounds animated:NO];
     _scrollView.alwaysBounceVertical = _imageContainerView.tz_height <= self.tz_height ? NO : YES;
     _imageView.frame = _imageContainerView.bounds;
@@ -129,4 +133,8 @@
     self.imageContainerView.center = CGPointMake(scrollView.contentSize.width * 0.5 + offsetX, scrollView.contentSize.height * 0.5 + offsetY);
 }
 
+- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale {
+   
+}
+
 @end

TZImagePickerController/TZImagePickerController/TZPhotoPreviewController.h

@@ -17,7 +17,8 @@
 
 /// Return the new selected photos / 返回最新的选中图片数组
 @property (nonatomic, copy) void (^backButtonClickBlock)(BOOL isSelectOriginalPhoto);
-@property (nonatomic, copy) void (^okButtonClickBlock)(BOOL isSelectOriginalPhoto);
-@property (nonatomic, copy) void (^okButtonClickBlockWithPreviewType)(NSArray<UIImage *> *photos,NSArray *assets,BOOL isSelectOriginalPhoto);
+@property (nonatomic, copy) void (^doneButtonClickBlock)(BOOL isSelectOriginalPhoto);
+@property (nonatomic, copy) void (^doneButtonClickBlockCropMode)(UIImage *cropedImage,id asset);
+@property (nonatomic, copy) void (^doneButtonClickBlockWithPreviewType)(NSArray<UIImage *> *photos,NSArray *assets,BOOL isSelectOriginalPhoto);
 
 @end

TZImagePickerController/TZImagePickerController/TZPhotoPreviewController.m

@@ -29,6 +29,8 @@
     UILabel *_numberLable;
     UIButton *_originalPhotoButton;
     UILabel *_originalPhotoLable;
+    
+    UIView *_cropView;
 }
 @end
 
@@ -45,6 +47,7 @@
     }
     [self configCollectionView];
     [self configCustomNaviBar];
+    [self configCropView];
     [self configBottomToolBar];
     self.view.clipsToBounds = YES;
 }
@@ -88,7 +91,7 @@
     [_selectButton setImage:[UIImage imageNamedFromMyBundle:tzImagePickerVc.photoDefImageName] forState:UIControlStateNormal];
     [_selectButton setImage:[UIImage imageNamedFromMyBundle:tzImagePickerVc.photoSelImageName] forState:UIControlStateSelected];
     [_selectButton addTarget:self action:@selector(select:) forControlEvents:UIControlEventTouchUpInside];
-    _selectButton.hidden = tzImagePickerVc.maxImagesCount == 1;
+    _selectButton.hidden = !tzImagePickerVc.showSelectBtn;
     
     [_naviBar addSubview:_selectButton];
     [_naviBar addSubview:_backButton];
@@ -97,7 +100,7 @@
 
 - (void)configBottomToolBar {
     _toolBar = [[UIView alloc] initWithFrame:CGRectMake(0, self.view.tz_height - 44, self.view.tz_width, 44)];
-    CGFloat rgb = 34 / 255.0;
+    static CGFloat rgb = 34 / 255.0;
     _toolBar.backgroundColor = [UIColor colorWithRed:rgb green:rgb blue:rgb alpha:1.0];
     _toolBar.alpha = 0.7;
     
@@ -130,7 +133,7 @@
     _okButton = [UIButton buttonWithType:UIButtonTypeCustom];
     _okButton.frame = CGRectMake(self.view.tz_width - 44 - 12, 0, 44, 44);
     _okButton.titleLabel.font = [UIFont systemFontOfSize:16];
-    [_okButton addTarget:self action:@selector(okButtonClick) forControlEvents:UIControlEventTouchUpInside];
+    [_okButton addTarget:self action:@selector(doneButtonClick) forControlEvents:UIControlEventTouchUpInside];
     [_okButton setTitle:[NSBundle tz_localizedStringForKey:@"Done"] forState:UIControlStateNormal];
     [_okButton setTitleColor:_tzImagePickerVc.oKButtonTitleColorNormal forState:UIControlStateNormal];
     
@@ -175,6 +178,38 @@
     [_collectionView registerClass:[TZPhotoPreviewCell class] forCellWithReuseIdentifier:@"TZPhotoPreviewCell"];
 }
 
+- (void)configCropView {
+    TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
+    if (!_tzImagePickerVc.showSelectBtn && _tzImagePickerVc.allowCrop) {
+        _cropView = [UIView new];
+        _cropView.userInteractionEnabled = NO;
+        static CGFloat rgb = 34 / 255.0;
+        _cropView.backgroundColor = [UIColor colorWithRed:rgb green:rgb blue:rgb alpha:1.0];
+        _cropView.alpha = 0.5;
+        _cropView.frame = self.view.bounds;
+        [self.view addSubview:_cropView];
+    
+        [self overlayClipping];
+    }
+}
+
+- (void)overlayClipping {
+    TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
+    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
+    CGMutablePathRef path = CGPathCreateMutable();
+    // Left side of _cropView
+    CGPathAddRect(path, nil, CGRectMake(0, 0, _tzImagePickerVc.cropRect.origin.x, _cropView.tz_height));
+    // Right side of _cropView
+    CGPathAddRect(path, nil, CGRectMake(CGRectGetMaxX(_tzImagePickerVc.cropRect), 0, _cropView.tz_width - _tzImagePickerVc.cropRect.origin.x - _tzImagePickerVc.cropRect.size.width, _cropView.tz_height));
+    // Top side of _cropView
+    CGPathAddRect(path, nil, CGRectMake(0, 0, _cropView.tz_width, _tzImagePickerVc.cropRect.origin.y));
+    // Bottom side _cropView
+    CGPathAddRect(path, nil, CGRectMake(0, CGRectGetMaxY(_tzImagePickerVc.cropRect), _cropView.tz_width, _cropView.tz_height - _tzImagePickerVc.cropRect.origin.y + _tzImagePickerVc.cropRect.size.height));
+    maskLayer.path = path;
+    _cropView.layer.mask = maskLayer;
+    CGPathRelease(path);
+}
+
 #pragma mark - Click Event
 
 - (void)select:(UIButton *)selectButton {
@@ -247,18 +282,26 @@
     }
 }
 
-- (void)okButtonClick {
+- (void)doneButtonClick {
     TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
     // 如果没有选中过照片 点击确定时选中当前预览的照片
     if (_tzImagePickerVc.selectedModels.count == 0 && _tzImagePickerVc.minImagesCount <= 0) {
         TZAssetModel *model = _models[_currentIndex];
         [_tzImagePickerVc.selectedModels addObject:model];
     }
-    if (self.okButtonClickBlock) {
-        self.okButtonClickBlock(_isSelectOriginalPhoto);
+    if (_tzImagePickerVc.allowCrop) { // 裁剪状态
+        NSIndexPath *indexPath = [NSIndexPath indexPathForItem:_currentIndex inSection:0];
+        TZPhotoPreviewCell *cell = (TZPhotoPreviewCell *)[_collectionView cellForItemAtIndexPath:indexPath];
+        UIImage *cropedImage = [self cropImageView:cell.imageView toRect:_tzImagePickerVc.cropRect zoomScale:cell.scrollView.zoomScale];
+        if (self.doneButtonClickBlockCropMode) {
+            TZAssetModel *model = _models[_currentIndex];
+            self.doneButtonClickBlockCropMode(cropedImage,model.asset);
+        }
+    } else if (self.doneButtonClickBlock) { // 非裁剪状态
+        self.doneButtonClickBlock(_isSelectOriginalPhoto);
     }
-    if (self.okButtonClickBlockWithPreviewType) {
-        self.okButtonClickBlockWithPreviewType(self.photos,_tzImagePickerVc.selectedAssets,self.isSelectOriginalPhoto);
+    if (self.doneButtonClickBlockWithPreviewType) {
+        self.doneButtonClickBlockWithPreviewType(self.photos,_tzImagePickerVc.selectedAssets,self.isSelectOriginalPhoto);
     }
 }
 
@@ -271,7 +314,7 @@
         if (!_selectButton.isSelected) {
             // 如果当前已选择照片张数 < 最大可选张数 && 最大可选张数大于1，就选中该张图
             TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
-            if (_tzImagePickerVc.selectedModels.count < _tzImagePickerVc.maxImagesCount && _tzImagePickerVc.maxImagesCount > 1) {
+            if (_tzImagePickerVc.selectedModels.count < _tzImagePickerVc.maxImagesCount && _tzImagePickerVc.showSelectBtn) {
                 [self select:_selectButton];
             }
         }
@@ -286,7 +329,7 @@
     
     NSInteger currentIndex = offSetWidth / (self.view.tz_width + 20);
     
-    if (_currentIndex != currentIndex) {
+    if (currentIndex < _models.count && _currentIndex != currentIndex) {
         _currentIndex = currentIndex;
         [self refreshNaviBarAndBottomBarState];
     }
@@ -301,7 +344,9 @@
 - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
     TZPhotoPreviewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TZPhotoPreviewCell" forIndexPath:indexPath];
     cell.model = _models[indexPath.row];
-    
+    TZImagePickerController *_tzImagePickerVc = (TZImagePickerController *)self.navigationController;
+    cell.cropRect = _tzImagePickerVc.cropRect;
+    cell.allowCrop = _tzImagePickerVc.allowCrop;
     if (!cell.singleTapGestureBlock) {
         __block BOOL _weakIsHideNaviBar = _isHideNaviBar;
         __weak typeof(_naviBar) weakNaviBar = _naviBar;
@@ -358,9 +403,9 @@
         }
     }
     
-    // 让宽度/高度小于 最小可选照片尺寸 的图片不能选中
     _okButton.hidden = NO;
-    _selectButton.hidden = _tzImagePickerVc.maxImagesCount == 1;
+    _selectButton.hidden = !_tzImagePickerVc.showSelectBtn;
+    // 让宽度/高度小于 最小可选照片尺寸 的图片不能选中
     if (![[TZImageManager manager] isPhotoSelectableWithAsset:model.asset]) {
         _numberLable.hidden = YES;
         _numberImageView.hidden = YES;
@@ -377,4 +422,61 @@
     }];
 }
 
+#pragma mark - Crop
+
+- (UIImage *)cropImageView:(UIImageView *)imageView toRect:(CGRect)rect zoomScale:(double)zoomScale {
+    CGAffineTransform transform = CGAffineTransformIdentity;
+    transform = CGAffineTransformScale(transform, zoomScale, zoomScale);
+    CGImageRef imageRef = [self newTransformedImage:transform
+                                        sourceImage:imageView.image.CGImage
+                                         sourceSize:imageView.image.size
+                                        outputWidth:imageView.image.size.width
+                                           cropSize:rect.size
+                                      imageViewSize:imageView.frame.size];
+    UIImage *cropedImage = [UIImage imageWithCGImage:imageRef];
+    CGImageRelease(imageRef);
+    return cropedImage;
+}
+
+- (CGImageRef)newTransformedImage:(CGAffineTransform)transform sourceImage:(CGImageRef)sourceImage sourceSize:(CGSize)sourceSize  outputWidth:(CGFloat)outputWidth cropSize:(CGSize)cropSize imageViewSize:(CGSize)imageViewSize {
+    CGImageRef source = [self newScaledImage:sourceImage toSize:sourceSize];
+    
+    CGFloat aspect = cropSize.height/cropSize.width;
+    CGSize outputSize = CGSizeMake(outputWidth, outputWidth*aspect);
+    
+    CGContextRef context = CGBitmapContextCreate(NULL, outputSize.width, outputSize.height, CGImageGetBitsPerComponent(source), 0, CGImageGetColorSpace(source), CGImageGetBitmapInfo(source));
+    CGContextSetFillColorWithColor(context, [[UIColor clearColor] CGColor]);
+    CGContextFillRect(context, CGRectMake(0, 0, outputSize.width, outputSize.height));
+    
+    CGAffineTransform uiCoords = CGAffineTransformMakeScale(outputSize.width / cropSize.width, outputSize.height / cropSize.height);
+    uiCoords = CGAffineTransformTranslate(uiCoords, cropSize.width/2.0, cropSize.height / 2.0);
+    uiCoords = CGAffineTransformScale(uiCoords, 1.0, -1.0);
+    CGContextConcatCTM(context, uiCoords);
+    
+    CGContextConcatCTM(context, transform);
+    CGContextScaleCTM(context, 1.0, -1.0);
+    
+    CGContextDrawImage(context, CGRectMake(-imageViewSize.width/2.0, -imageViewSize.height/2.0, imageViewSize.width, imageViewSize.height), source);
+    CGImageRef resultRef = CGBitmapContextCreateImage(context);
+    CGContextRelease(context);
+    CGImageRelease(source);
+    return resultRef;
+}
+
+- (CGImageRef)newScaledImage:(CGImageRef)source toSize:(CGSize)size {
+    CGSize srcSize = size;
+    CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
+    CGContextRef context = CGBitmapContextCreate(NULL, size.width, size.height, 8, 0, rgbColorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
+    CGColorSpaceRelease(rgbColorSpace);
+    
+    CGContextSetInterpolationQuality(context, kCGInterpolationNone);
+    CGContextTranslateCTM(context, size.width/2, size.height/2);
+    
+    CGContextDrawImage(context, CGRectMake(-srcSize.width/2, -srcSize.height/2, srcSize.width, srcSize.height), source);
+    
+    CGImageRef resultRef = CGBitmapContextCreateImage(context);
+    CGContextRelease(context);
+    return resultRef;
+}
+
 @end

TZImagePickerController/TZTestCell.m

@@ -20,7 +20,7 @@
         self.backgroundColor = [UIColor whiteColor];
         _imageView = [[UIImageView alloc] init];
         _imageView.backgroundColor = [UIColor colorWithWhite:1.000 alpha:0.500];
-        _imageView.contentMode = UIViewContentModeScaleAspectFill;
+        _imageView.contentMode = UIViewContentModeScaleAspectFit;
         [self addSubview:_imageView];
         self.clipsToBounds = YES;
         

TZImagePickerController/ViewController.m

@@ -69,6 +69,7 @@
     _selectedPhotos = [NSMutableArray array];
     _selectedAssets = [NSMutableArray array];
     [self configCollectionView];
+    self.maxCountTF.text = @"1";
 }
 
 - (BOOL)prefersStatusBarHidden {
@@ -225,6 +226,13 @@
     
     // imagePickerVc.minPhotoWidthSelectable = 3000;
     // imagePickerVc.minPhotoHeightSelectable = 2000;
+    
+    /// 5. Single selection mode, valid when maxImagesCount = 1
+    /// 5. 单选模式,maxImagesCount为1时才生效
+    imagePickerVc.showSelectBtn = NO;
+    imagePickerVc.allowCrop = YES;
+    NSInteger cropWH = self.view.tz_width - 40;
+    imagePickerVc.cropRect = CGRectMake(20, (self.view.tz_height - cropWH) / 2 + 50, cropWH, cropWH - 100);
 #pragma mark - 到这里为止
     
     // You can get the photos by block, the same as by delegate.