尝试在批量获取图片时加一个队列控制

TZImagePickerController.xcodeproj/project.pbxproj

@@ -29,6 +29,9 @@
 		900EF00F1C2C0B1100EA709B /* TZAssetModel.m in Sources */ = {isa = PBXBuildFile; fileRef = 900EF00E1C2C0B1100EA709B /* TZAssetModel.m */; };
 		900EF0121C2C107400EA709B /* TZPhotoPreviewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 900EF0111C2C107400EA709B /* TZPhotoPreviewController.m */; };
 		900EF0161C2C134900EA709B /* TZPhotoPreviewCell.m in Sources */ = {isa = PBXBuildFile; fileRef = 900EF0141C2C134900EA709B /* TZPhotoPreviewCell.m */; };
+		901CC3FA21CB757500C55443 /* TZImageRequestOperation.h in Headers */ = {isa = PBXBuildFile; fileRef = 901CC3F821CB757500C55443 /* TZImageRequestOperation.h */; };
+		901CC3FB21CB757500C55443 /* TZImageRequestOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = 901CC3F921CB757500C55443 /* TZImageRequestOperation.m */; };
+		901CC3FC21CB758500C55443 /* TZImageRequestOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = 901CC3F921CB757500C55443 /* TZImageRequestOperation.m */; };
 		901F2295215CABD600F604ED /* FLAnimatedImage.m in Sources */ = {isa = PBXBuildFile; fileRef = 901F2291215CABD600F604ED /* FLAnimatedImage.m */; };
 		901F2296215CABD600F604ED /* FLAnimatedImageView.m in Sources */ = {isa = PBXBuildFile; fileRef = 901F2293215CABD600F604ED /* FLAnimatedImageView.m */; };
 		902938D81EE2D02C000F2F8F /* TZLocationManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 902938D71EE2D02C000F2F8F /* TZLocationManager.m */; };
@@ -152,6 +155,8 @@
 		900EF0111C2C107400EA709B /* TZPhotoPreviewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TZPhotoPreviewController.m; sourceTree = "<group>"; };
 		900EF0131C2C134800EA709B /* TZPhotoPreviewCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TZPhotoPreviewCell.h; sourceTree = "<group>"; };
 		900EF0141C2C134900EA709B /* TZPhotoPreviewCell.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TZPhotoPreviewCell.m; sourceTree = "<group>"; };
+		901CC3F821CB757500C55443 /* TZImageRequestOperation.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = TZImageRequestOperation.h; sourceTree = "<group>"; };
+		901CC3F921CB757500C55443 /* TZImageRequestOperation.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = TZImageRequestOperation.m; sourceTree = "<group>"; };
 		901F2290215CABD600F604ED /* FLAnimatedImage.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FLAnimatedImage.h; sourceTree = "<group>"; };
 		901F2291215CABD600F604ED /* FLAnimatedImage.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = FLAnimatedImage.m; sourceTree = "<group>"; };
 		901F2292215CABD600F604ED /* FLAnimatedImageView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FLAnimatedImageView.h; sourceTree = "<group>"; };
@@ -314,6 +319,8 @@
 				6DD0502A1DF659ED0057C78D /* TZProgressView.m */,
 				90CE84AC1C3A89EF003D0779 /* TZImageManager.h */,
 				90CE84AD1C3A89EF003D0779 /* TZImageManager.m */,
+				901CC3F821CB757500C55443 /* TZImageRequestOperation.h */,
+				901CC3F921CB757500C55443 /* TZImageRequestOperation.m */,
 				6DC84D081DF5358500A107A9 /* TZImageCropManager.h */,
 				6DC84D091DF5358500A107A9 /* TZImageCropManager.m */,
 				902938D61EE2D02C000F2F8F /* TZLocationManager.h */,
@@ -370,6 +377,7 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				901CC3FA21CB757500C55443 /* TZImageRequestOperation.h in Headers */,
 				9F763A6B1FA0731E00D9E526 /* TZImagePickerController.h in Headers */,
 				9F763A6D1FA0733700D9E526 /* NSBundle+TZImagePicker.h in Headers */,
 				9F763A6C1FA0733100D9E526 /* TZAssetModel.h in Headers */,
@@ -577,6 +585,7 @@
 				901F2296215CABD600F604ED /* FLAnimatedImageView.m in Sources */,
 				900E65811C2BB8D5003D9A9E /* main.m in Sources */,
 				900EF0121C2C107400EA709B /* TZPhotoPreviewController.m in Sources */,
+				901CC3FC21CB758500C55443 /* TZImageRequestOperation.m in Sources */,
 				6D5358CD1D64600F00928CC6 /* NSBundle+TZImagePicker.m in Sources */,
 				900EEFF81C2BBF9500EA709B /* TZImagePickerController.m in Sources */,
 				902938D81EE2D02C000F2F8F /* TZLocationManager.m in Sources */,
@@ -604,6 +613,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				901CC3FB21CB757500C55443 /* TZImageRequestOperation.m in Sources */,
 				9F763A501FA072E500D9E526 /* TZImagePickerController.m in Sources */,
 				9F763A521FA072E500D9E526 /* TZPhotoPickerController.m in Sources */,
 				9F763A541FA072E500D9E526 /* TZAssetCell.m in Sources */,

TZImagePickerController/TZImagePickerController/TZImageRequestOperation.h

+//
+//  TZImageRequestOperation.h
+//  TZImagePickerControllerFramework
+//
+//  Created by 谭真 on 2018/12/20.
+//  Copyright © 2018 谭真. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <Photos/Photos.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface TZImageRequestOperation : NSOperation
+
+typedef void(^TZImageRequestCompletedBlock)(UIImage *photo, NSDictionary *info, BOOL isDegraded);
+typedef void(^TZImageRequestProgressBlock)(double progress, NSError *error, BOOL *stop, NSDictionary *info);
+
+- (instancetype)initWithAsset:(PHAsset *)asset completion:(TZImageRequestCompletedBlock)completionBlock progressHandler:(TZImageRequestProgressBlock)progressHandler;
+@end
+
+NS_ASSUME_NONNULL_END

TZImagePickerController/TZImagePickerController/TZImageRequestOperation.m

+//
+//  TZImageRequestOperation.m
+//  TZImagePickerControllerFramework
+//
+//  Created by 谭真 on 2018/12/20.
+//  Copyright © 2018 谭真. All rights reserved.
+//
+
+#import "TZImageRequestOperation.h"
+#import "TZImageManager.h"
+
+@interface TZImageRequestOperation ()
+@property (nonatomic, copy) TZImageRequestCompletedBlock completedBlock;
+@property (nonatomic, copy) TZImageRequestProgressBlock progressBlock;
+@property (nonatomic, strong) PHAsset *asset;
+
+@property (assign, nonatomic, getter = isExecuting) BOOL executing;
+@property (assign, nonatomic, getter = isFinished) BOOL finished;
+@end
+
+@implementation TZImageRequestOperation
+
+@synthesize executing = _executing;
+@synthesize finished = _finished;
+
+- (instancetype)initWithAsset:(PHAsset *)asset completion:(TZImageRequestCompletedBlock)completionBlock progressHandler:(TZImageRequestProgressBlock)progressHandler {
+    self = [super init];
+    self.asset = asset;
+    self.completedBlock = completionBlock;
+    self.progressBlock = progressHandler;
+    _executing = NO;
+    _finished = NO;
+    return self;
+}
+
+- (void)start {
+    self.executing = YES;
+    dispatch_async(dispatch_get_global_queue(0, 0), ^{
+        [[TZImageManager manager] getPhotoWithAsset:self.asset completion:^(UIImage *photo, NSDictionary *info, BOOL isDegraded) {
+            dispatch_async(dispatch_get_main_queue(), ^{
+                if (!isDegraded) {
+                    if (self.completedBlock) {
+                        self.completedBlock(photo, info, isDegraded);
+                    }
+                    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+                        [self done];
+                    });
+                }
+            });
+        } progressHandler:^(double progress, NSError *error, BOOL *stop, NSDictionary *info) {
+            dispatch_async(dispatch_get_main_queue(), ^{
+                if (self.progressBlock) {
+                    self.progressBlock(progress, error, stop, info);
+                }
+            });
+        } networkAccessAllowed:YES];
+    });
+}
+
+- (void)done {
+    self.finished = YES;
+    self.executing = NO;
+    [self reset];
+}
+
+- (void)reset {
+    self.asset = nil;
+    self.completedBlock = nil;
+    self.progressBlock = nil;
+}
+
+- (void)setFinished:(BOOL)finished {
+    [self willChangeValueForKey:@"isFinished"];
+    _finished = finished;
+    [self didChangeValueForKey:@"isFinished"];
+}
+
+- (void)setExecuting:(BOOL)executing {
+    [self willChangeValueForKey:@"isExecuting"];
+    _executing = executing;
+    [self didChangeValueForKey:@"isExecuting"];
+}
+
+- (BOOL)isAsynchronous {
+    return YES;
+}
+
+@end

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -17,6 +17,7 @@
 #import "TZGifPhotoPreviewController.h"
 #import "TZLocationManager.h"
 #import <MobileCoreServices/MobileCoreServices.h>
+#import "TZImageRequestOperation.h"
 
 @interface TZPhotoPickerController ()<UICollectionViewDataSource,UICollectionViewDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIAlertViewDelegate> {
     NSMutableArray *_models;
@@ -42,6 +43,7 @@
 @property (strong, nonatomic) UICollectionViewFlowLayout *layout;
 @property (nonatomic, strong) UIImagePickerController *imagePickerVc;
 @property (strong, nonatomic) CLLocation *location;
+@property (nonatomic, strong) NSOperationQueue *operationQueue;
 @end
 
 static CGSize AssetGridThumbnailSize;
@@ -93,6 +95,9 @@ static CGFloat itemMargin = 5;
     _showTakePhotoBtn = _model.isCameraRoll && ((tzImagePickerVc.allowTakePicture && tzImagePickerVc.allowPickingImage) || (tzImagePickerVc.allowTakeVideo && tzImagePickerVc.allowPickingVideo));
     // [self resetCachedAssets];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didChangeStatusBarOrientationNotification:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
+    
+    self.operationQueue = [[NSOperationQueue alloc] init];
+    self.operationQueue.maxConcurrentOperationCount = 3;
 }
 
 - (void)fetchAssetModels {
@@ -399,7 +404,7 @@ static CGFloat itemMargin = 5;
         __block UIAlertController *alertView;
         for (NSInteger i = 0; i < tzImagePickerVc.selectedModels.count; i++) {
             TZAssetModel *model = tzImagePickerVc.selectedModels[i];
-            [[TZImageManager manager] getPhotoWithAsset:model.asset completion:^(UIImage *photo, NSDictionary *info, BOOL isDegraded) {
+            TZImageRequestOperation *operation = [[TZImageRequestOperation alloc] initWithAsset:model.asset completion:^(UIImage * _Nonnull photo, NSDictionary * _Nonnull info, BOOL isDegraded) {
                 if (isDegraded) return;
                 if (photo) {
                     if (![TZImagePickerConfig sharedInstance].notScaleImage) {
@@ -416,7 +421,7 @@ static CGFloat itemMargin = 5;
                     [tzImagePickerVc hideAlertView:alertView];
                     [self didGetAllPhotos:photos assets:assets infoArr:infoArr];
                 }
-            } progressHandler:^(double progress, NSError *error, BOOL *stop, NSDictionary *info) {
+            } progressHandler:^(double progress, NSError * _Nonnull error, BOOL * _Nonnull stop, NSDictionary * _Nonnull info) {
                 // 如果图片正在从iCloud同步中,提醒用户
                 if (progress < 1 && havenotShowAlert && !alertView) {
                     [tzImagePickerVc hideProgressHUD];
@@ -427,7 +432,8 @@ static CGFloat itemMargin = 5;
                 if (progress >= 1) {
                     havenotShowAlert = YES;
                 }
-            } networkAccessAllowed:YES];
+            }];
+            [self.operationQueue addOperation:operation];
         }
     }
     if (tzImagePickerVc.selectedModels.count <= 0 || tzImagePickerVc.onlyReturnAsset) {