修改UI

Pods/JXCategoryView/Sources/TitleImage/JXCategoryTitleImageCell.m

@@ -0,0 +1,148 @@
+//
+//  JXCategoryImageCell.m
+//  JXCategoryView
+//
+//  Created by jiaxin on 2018/8/8.
+//  Copyright © 2018年 jiaxin. All rights reserved.
+//
+
+#import "JXCategoryTitleImageCell.h"
+#import "JXCategoryTitleImageCellModel.h"
+
+@interface JXCategoryTitleImageCell()
+@property (nonatomic, strong) id currentImageInfo;
+@property (nonatomic, strong) NSString *currentImageName;
+@property (nonatomic, strong) NSURL *currentImageURL;
+@property (nonatomic, strong) UIStackView *stackView;
+@property (nonatomic, strong) NSLayoutConstraint *imageViewWidthConstraint;
+@property (nonatomic, strong) NSLayoutConstraint *imageViewHeightConstraint;
+@end
+
+@implementation JXCategoryTitleImageCell
+
+- (void)prepareForReuse {
+    [super prepareForReuse];
+    
+    self.currentImageInfo = nil;
+    self.currentImageName = nil;
+    self.currentImageURL = nil;
+}
+
+- (void)initializeViews {
+    [super initializeViews];
+
+    [self.titleLabel removeFromSuperview];
+
+    _imageView = [[UIImageView alloc] init];
+    self.imageView.translatesAutoresizingMaskIntoConstraints = NO;
+    self.imageView.contentMode = UIViewContentModeScaleAspectFit;
+    self.imageViewWidthConstraint = [self.imageView.widthAnchor constraintEqualToConstant:0];
+    self.imageViewWidthConstraint.active = YES;
+    self.imageViewHeightConstraint = [self.imageView.heightAnchor constraintEqualToConstant:0];
+    self.imageViewHeightConstraint.active = YES;
+
+    _stackView = [[UIStackView alloc] init];
+    self.stackView.alignment = UIStackViewAlignmentCenter;
+    [self.contentView addSubview:self.stackView];
+    self.stackView.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.stackView.centerXAnchor constraintEqualToAnchor:self.contentView.centerXAnchor].active = YES;
+    [self.stackView.centerYAnchor constraintEqualToAnchor:self.contentView.centerYAnchor].active = YES;
+}
+
+- (void)reloadData:(JXCategoryBaseCellModel *)cellModel {
+    [super reloadData:cellModel];
+
+    JXCategoryTitleImageCellModel *myCellModel = (JXCategoryTitleImageCellModel *)cellModel;
+
+    self.titleLabel.hidden = NO;
+    self.imageView.hidden = NO;
+    [self.stackView removeArrangedSubview:self.titleLabel];
+    [self.stackView removeArrangedSubview:self.imageView];
+    CGSize imageSize = myCellModel.imageSize;
+    self.imageViewWidthConstraint.constant = imageSize.width;
+    self.imageViewHeightConstraint.constant = imageSize.height;
+    self.stackView.spacing = myCellModel.titleImageSpacing;
+    
+    switch (myCellModel.imageType) {
+        case JXCategoryTitleImageType_TopImage: {
+            self.stackView.axis = UILayoutConstraintAxisVertical;
+            [self.stackView addArrangedSubview:self.imageView];
+            [self.stackView addArrangedSubview:self.titleLabel];
+            break;
+        }
+        case JXCategoryTitleImageType_LeftImage: {
+            self.stackView.axis = UILayoutConstraintAxisHorizontal;
+            [self.stackView addArrangedSubview:self.imageView];
+            [self.stackView addArrangedSubview:self.titleLabel];
+            break;
+        }
+        case JXCategoryTitleImageType_BottomImage: {
+            self.stackView.axis = UILayoutConstraintAxisVertical;
+            [self.stackView addArrangedSubview:self.titleLabel];
+            [self.stackView addArrangedSubview:self.imageView];
+            break;
+        }
+        case JXCategoryTitleImageType_RightImage: {
+            self.stackView.axis = UILayoutConstraintAxisHorizontal;
+            [self.stackView addArrangedSubview:self.titleLabel];
+            [self.stackView addArrangedSubview:self.imageView];
+            break;
+        }
+        case JXCategoryTitleImageType_OnlyImage: {
+            self.titleLabel.hidden = YES;
+            [self.stackView addArrangedSubview:self.imageView];
+            break;
+        }
+        case JXCategoryTitleImageType_OnlyTitle: {
+            self.imageView.hidden = YES;
+            [self.stackView addArrangedSubview:self.titleLabel];
+            break;
+        }
+    }
+
+    //因为`- (void)reloadData:(JXCategoryBaseCellModel *)cellModel`方法会回调多次，尤其是左右滚动的时候会调用无数次，如果每次都触发图片加载，会非常消耗性能。所以只会在图片发生了变化的时候，才进行图片加载。
+    if (myCellModel.loadImageBlock != nil) {
+        id currentImageInfo = myCellModel.imageInfo;
+        if (myCellModel.isSelected) {
+            currentImageInfo = myCellModel.selectedImageInfo;
+        }
+        if (currentImageInfo && ![currentImageInfo isEqual:self.currentImageInfo]) {
+            self.currentImageInfo = currentImageInfo;
+            if (myCellModel.loadImageBlock) {
+                myCellModel.loadImageBlock(self.imageView, currentImageInfo);
+            }
+        }
+    }else {
+        NSString *currentImageName;
+        NSURL *currentImageURL;
+        if (myCellModel.imageName) {
+            currentImageName = myCellModel.imageName;
+        } else if (myCellModel.imageURL) {
+            currentImageURL = myCellModel.imageURL;
+        }
+        if (myCellModel.isSelected) {
+            if (myCellModel.selectedImageName) {
+                currentImageName = myCellModel.selectedImageName;
+            } else if (myCellModel.selectedImageURL) {
+                currentImageURL = myCellModel.selectedImageURL;
+            }
+        }
+        if (currentImageName && ![currentImageName isEqualToString:self.currentImageName]) {
+            self.currentImageName = currentImageName;
+            self.imageView.image = [UIImage imageNamed:currentImageName];
+        } else if (currentImageURL && ![currentImageURL.absoluteString isEqualToString:self.currentImageURL.absoluteString]) {
+            self.currentImageURL = currentImageURL;
+            if (myCellModel.loadImageCallback) {
+                myCellModel.loadImageCallback(self.imageView, currentImageURL);
+            }
+        }
+    }
+
+    if (myCellModel.isImageZoomEnabled) {
+        self.imageView.transform = CGAffineTransformMakeScale(myCellModel.imageZoomScale, myCellModel.imageZoomScale);
+    } else {
+        self.imageView.transform = CGAffineTransformIdentity;
+    }
+}
+
+@end