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keyBoard/Class/Common/V/KBImagePositionButton.h
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39
keyBoard/Class/Common/V/KBImagePositionButton.h
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//
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// KBImagePositionButton.h
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// keyBoard
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//
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// Created by Kiro on 2026/1/27.
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//
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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/// 图片位置枚举
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typedef NS_ENUM(NSInteger, KBImagePosition) {
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KBImagePositionTop, // 图片在上，文字在下
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KBImagePositionBottom, // 图片在下，文字在上
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KBImagePositionLeft, // 图片在左，文字在右（默认）
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KBImagePositionRight // 图片在右，文字在左
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};
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/// 可以指定图片位置的按钮
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@interface KBImagePositionButton : UIButton
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/// 图片位置（默认 KBImagePositionLeft）
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@property (nonatomic, assign) KBImagePosition imagePosition;
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/// 图片和文字之间的间距（默认 8）
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@property (nonatomic, assign) CGFloat spacing;
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/**
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便捷初始化方法
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@param imagePosition 图片位置
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@param spacing 图片和文字之间的间距
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*/
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- (instancetype)initWithImagePosition:(KBImagePosition)imagePosition spacing:(CGFloat)spacing;
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@end
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NS_ASSUME_NONNULL_END
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187
keyBoard/Class/Common/V/KBImagePositionButton.m
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187
keyBoard/Class/Common/V/KBImagePositionButton.m
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//
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// KBImagePositionButton.m
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// keyBoard
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//
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// Created by Kiro on 2026/1/27.
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//
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#import "KBImagePositionButton.h"
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@implementation KBImagePositionButton
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- (instancetype)initWithFrame:(CGRect)frame {
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if (self = [super initWithFrame:frame]) {
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[self setupDefault];
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}
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return self;
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}
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- (instancetype)initWithCoder:(NSCoder *)coder {
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if (self = [super initWithCoder:coder]) {
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[self setupDefault];
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}
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return self;
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}
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- (instancetype)initWithImagePosition:(KBImagePosition)imagePosition spacing:(CGFloat)spacing {
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if (self = [super initWithFrame:CGRectZero]) {
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_imagePosition = imagePosition;
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_spacing = spacing;
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[self setupDefault];
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}
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return self;
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}
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- (void)setupDefault {
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// 关键修复：不要判断 _imagePosition == 0，因为 KBImagePositionTop 的值就是 0
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// 如果是通过 initWithFrame 或 initWithCoder 初始化，_imagePosition 默认就是 0 (KBImagePositionTop)
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// 只有通过 initWithImagePosition 初始化时，才会明确设置 _imagePosition
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// 为非自定义初始化设置默认值
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if (self.spacing == 0) {
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_spacing = 8;
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}
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[self updateEdgeInsets];
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}
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#pragma mark - Setter
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- (void)setImagePosition:(KBImagePosition)imagePosition {
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_imagePosition = imagePosition;
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[self updateEdgeInsets];
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[self setNeedsLayout];
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}
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- (void)setSpacing:(CGFloat)spacing {
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_spacing = spacing;
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[self updateEdgeInsets];
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[self setNeedsLayout];
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}
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- (void)setImage:(UIImage *)image forState:(UIControlState)state {
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[super setImage:image forState:state];
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// 延迟更新，确保 image 已经设置好
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dispatch_async(dispatch_get_main_queue(), ^{
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[self updateEdgeInsets];
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});
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}
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- (void)setTitle:(NSString *)title forState:(UIControlState)state {
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[super setTitle:title forState:state];
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// 延迟更新，确保 title 已经设置好
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dispatch_async(dispatch_get_main_queue(), ^{
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[self updateEdgeInsets];
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});
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}
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#pragma mark - EdgeInsets
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- (void)updateEdgeInsets {
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CGSize imageSize = self.currentImage.size;
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CGSize titleSize = CGSizeZero;
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if (self.currentTitle.length > 0 && self.titleLabel.font) {
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NSDictionary *attributes = @{NSFontAttributeName: self.titleLabel.font};
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titleSize = [self.currentTitle sizeWithAttributes:attributes];
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}
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switch (self.imagePosition) {
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case KBImagePositionTop: {
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// 图片在上，文字在下
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self.imageEdgeInsets = UIEdgeInsetsMake(
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-(titleSize.height + self.spacing), // top: 向上移动
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0, // left
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0, // bottom
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-titleSize.width // right: 向左移动文字的宽度
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);
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self.titleEdgeInsets = UIEdgeInsetsMake(
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imageSize.height + self.spacing, // top: 向下移动
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-imageSize.width, // left: 向左移动图片的宽度
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0, // bottom
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0 // right
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);
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break;
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}
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case KBImagePositionBottom: {
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// 图片在下，文字在上
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self.imageEdgeInsets = UIEdgeInsetsMake(
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titleSize.height + self.spacing, // top: 向下移动
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0, // left
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0, // bottom
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-titleSize.width // right
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);
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self.titleEdgeInsets = UIEdgeInsetsMake(
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-(imageSize.height + self.spacing), // top: 向上移动
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-imageSize.width, // left
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0, // bottom
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0 // right
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);
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break;
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}
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case KBImagePositionLeft: {
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// 图片在左，文字在右（默认）
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self.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, self.spacing);
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self.titleEdgeInsets = UIEdgeInsetsMake(0, self.spacing, 0, 0);
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break;
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}
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case KBImagePositionRight: {
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// 图片在右，文字在左
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self.imageEdgeInsets = UIEdgeInsetsMake(
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0,
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titleSize.width + self.spacing,
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0,
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-(titleSize.width + self.spacing)
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);
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self.titleEdgeInsets = UIEdgeInsetsMake(
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0,
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-(imageSize.width + self.spacing),
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0,
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imageSize.width + self.spacing
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);
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break;
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}
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}
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NSLog(@"imageEdgeInsets: %@", NSStringFromUIEdgeInsets(self.imageEdgeInsets));
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NSLog(@"titleEdgeInsets: %@", NSStringFromUIEdgeInsets(self.titleEdgeInsets));
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}
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- (CGSize)intrinsicContentSize {
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CGSize imageSize = self.currentImage ? self.currentImage.size : CGSizeZero;
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CGSize titleSize = CGSizeZero;
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if (self.currentTitle.length > 0 && self.titleLabel.font) {
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NSDictionary *attributes = @{NSFontAttributeName: self.titleLabel.font};
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titleSize = [self.currentTitle sizeWithAttributes:attributes];
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}
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CGSize size = CGSizeZero;
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switch (self.imagePosition) {
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case KBImagePositionTop:
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case KBImagePositionBottom: {
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// 垂直排列
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size.width = MAX(imageSize.width, titleSize.width);
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size.height = imageSize.height + self.spacing + titleSize.height;
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break;
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}
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case KBImagePositionLeft:
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case KBImagePositionRight: {
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// 水平排列
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size.width = imageSize.width + self.spacing + titleSize.width;
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size.height = MAX(imageSize.height, titleSize.height);
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break;
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}
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}
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return size;
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}
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@end
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