使用方式
- (UICollectionViewCell<TYTabPagerBarCellProtocol> *)pagerTabBar:(TYTabPagerBar *)pagerTabBar cellForItemAtIndex:(NSInteger)index {
// UICollectionViewCell<TYTabPagerBarCellProtocol> *cell = [pagerTabBar dequeueReusableCellWithReuseIdentifier:[TYTabPagerBarCell cellIdentifier] forIndex:index];
TYTabPagerBarCell *cell = [pagerTabBar dequeueReusableCellWithReuseIdentifier:[TYTabPagerBarCell cellIdentifier] forIndex:index];
NSDictionary *subDic = _dataArray[index];
cell.titleLabel.text = [PublicObj hfTitle:subDic];
if ([PublicObj hfHasImg:subDic]) {
cell.ty_showImg = YES;
cell.ty_imgWidth = [PublicObj hfShowWidth:subDic];
[cell.ty_imageView sd_setImageWithURL:[NSURL URLWithString:[PublicObj hfImgUrl:subDic]]];
}else {
cell.ty_showImg = NO;
cell.ty_imgWidth = 0;
}
return cell;
}
给TYTabPagerBarCell增加属性
.h
#import <TYPagerController/TYPagerController.h>
#import <TYPagerController/TYTabPagerBarCell.h>
NS_ASSUME_NONNULL_BEGIN
@interface TYTabPagerBarCell (Bar)
// 新增的图片视图
@property (nonatomic, strong) UIImageView *ty_imageView;
// 控制是否显示图片
@property (nonatomic, assign) BOOL ty_showImg;
// 图片宽度（新增）
@property (nonatomic, assign) CGFloat ty_imgWidth;
@end
NS_ASSUME_NONNULL_END
.m
#import "TYTabPagerBarCell+Bar.h"
#import <objc/runtime.h>
#import <objc/message.h>
// 关联对象key
static const void *TYImageViewKey = &TYImageViewKey;
static const void *TYShowImgKey = &TYShowImgKey;
static const void *TYImgWidthKey = &TYImgWidthKey;
@implementation TYTabPagerBarCell (Bar)
#pragma mark - 关联属性实现
- (UIImageView *)ty_imageView {
UIImageView *imageView = objc_getAssociatedObject(self, TYImageViewKey);
if (!imageView) {
imageView = [[UIImageView alloc] init];
imageView.contentMode = UIViewContentModeScaleAspectFit;
[self.contentView addSubview:imageView];
objc_setAssociatedObject(self, TYImageViewKey, imageView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
return imageView;
}
- (void)setTy_imageView:(UIImageView *)ty_imageView {
objc_setAssociatedObject(self, TYImageViewKey, ty_imageView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)ty_showImg {
return [objc_getAssociatedObject(self, TYShowImgKey) boolValue];
}
- (void)setTy_showImg:(BOOL)ty_showImg {
objc_setAssociatedObject(self, TYShowImgKey, @(ty_showImg), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self setNeedsLayout];
}
- (CGFloat)ty_imgWidth {
NSNumber *widthNum = objc_getAssociatedObject(self, TYImgWidthKey);
return widthNum ? [widthNum floatValue] : 20.0f;
}
- (void)setTy_imgWidth:(CGFloat)ty_imgWidth {
objc_setAssociatedObject(self, TYImgWidthKey, @(ty_imgWidth), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self setNeedsLayout];
}
#pragma mark - 方法交换
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
// 只交换布局方法，移除初始化方法交换
[self swizzleMethod:@selector(layoutSubviews) withMethod:@selector(ty_layoutSubviews)];
});
}
+ (void)swizzleMethod:(SEL)originalSEL withMethod:(SEL)swizzledSEL {
Class class = [self class];
Method originalMethod = class_getInstanceMethod(class, originalSEL);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSEL);
BOOL didAddMethod = class_addMethod(class, originalSEL, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
if (didAddMethod) {
class_replaceMethod(class, swizzledSEL, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
}
#pragma mark - 布局方法（文字在前，图片在后）
- (void)ty_layoutSubviews {
[self ty_layoutSubviews]; // 先执行原布局逻辑
if (self.ty_showImg) {
// 第一次访问ty_imageView时会自动创建并添加到contentView
CGFloat imageW = self.ty_imgWidth;
CGFloat imageH = [PublicObj hfShowHeight]; // 可按需新增imgHeight属性
CGFloat spacing = [PublicObj hfImgTxtSpace]; // 图文间距
// 兼容iOS 13+的文字宽度计算（避免废弃API警告）
CGFloat titleW = [self.titleLabel.text boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, self.titleLabel.font.lineHeight)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{NSFontAttributeName: self.titleLabel.font}
context:nil].size.width;
CGFloat totalW = titleW + spacing + imageW; // 图文总宽度（文字+间距+图片）
// CGFloat totalH = MAX(imageH, self.titleLabel.font.lineHeight); // 图文总高度
// 整体居中的基准坐标
CGFloat centerX = self.contentView.bounds.size.width / 2;
CGFloat centerY = self.contentView.bounds.size.height / 2;
// ===== 核心修改：文字在前（左），图片在后（右） =====
// 文字布局：整体居中的左侧起点
self.titleLabel.frame = CGRectMake(centerX - totalW / 2,
centerY - self.titleLabel.font.lineHeight / 2,
titleW,
self.titleLabel.font.lineHeight);
// 图片布局：文字右侧，间距spacing
self.ty_imageView.frame = CGRectMake(CGRectGetMaxX(self.titleLabel.frame) + spacing,
centerY - imageH / 2,
imageW,
imageH);
self.ty_imageView.hidden = NO;
} else {
// 不显示图片：仅文字居中
self.titleLabel.frame = self.contentView.bounds;
self.ty_imageView.hidden = YES;
}
}
@end
