增加换肤功能

QXLive/Tools/Category/UIButton+QX.m

@@ -0,0 +1,127 @@
+//
+//  UIButton+QX.m
+//  QXLive
+//
+//  Created by 启星 on 2025/4/28.
+//
+
+#import "UIButton+QX.h"
+
+@implementation UIButton (QX)
+- (void)qx_layoutButtonWithEdgeInsetsStyle:(QXButtonEdgeInsetsStyle)style
+                        imageTitleSpace:(CGFloat)space{
+    [self sizeToFit];
+    [self qx_layoutButtonNOSizeToFitWithEdgeInsetsStyle:style imageTitleSpace:space];
+}
+
+- (void)qx_layoutButtonNOSizeToFitWithEdgeInsetsStyle:(QXButtonEdgeInsetsStyle)style
+                                   imageTitleSpace:(CGFloat)space {
+    /**
+     * 前置知识点：titleEdgeInsets是title相对于其上下左右的inset，跟tableView的contentInset是类似的，
+     * 如果只有title，那它的上下左右都是相对于button的，image也是一样；
+     * 如果同时有image和label，那这时候image的上左下是相对于button，右边是相对于label的；title的上右下是相对于button，左边是相对于image的。
+     */
+    
+    CGFloat spacef = ceilf(space);
+    
+    
+    // 1.得到imageView和titleLabel的宽、高
+    CGFloat imageWidth = self.imageView.frame.size.width;
+    CGFloat imageHeight = self.imageView.frame.size.height;
+    
+    CGFloat labelWidth = 0.0;
+    CGFloat labelHeight = 0.0;
+    if (@available(iOS 8.0, *)) {
+        // 由于iOS8中titleLabel的size为0，用下面的设置
+        labelWidth = self.titleLabel.intrinsicContentSize.width;
+        labelHeight = self.titleLabel.intrinsicContentSize.height;
+    }else {
+        labelWidth = self.titleLabel.frame.size.width;
+        labelHeight = self.titleLabel.frame.size.height;
+    }
+    
+    // 2.声明全局的imageEdgeInsets和labelEdgeInsets
+    UIEdgeInsets imageEdgeInsets = UIEdgeInsetsZero;
+    UIEdgeInsets labelEdgeInsets = UIEdgeInsetsZero;
+    UIEdgeInsets contentEdgeInsets = UIEdgeInsetsZero;
+    
+    CGFloat imageOffSetX = labelWidth / 2.0;
+    CGFloat labelOffSetX = imageWidth / 2.0;
+    
+    CGFloat maxWidth = MAX(imageWidth,labelWidth); // 上下排布宽度肯定变小 获取最大宽度的那个
+    CGFloat changeWidth = imageWidth + labelWidth - maxWidth; // 横向缩小的总宽度
+    CGFloat maxHeight = MAX(imageHeight,labelHeight); // 获取最大高度那个 （就是水平默认排布的时候的原始高度）
+    
+    // 3.根据style和spacef得到imageEdgeInsets和labelEdgeInsets的值
+    switch (style) {
+        case QXButtonEdgeInsetsStyleTop:
+            {
+                CGFloat gap = (maxHeight - MIN(imageHeight, labelHeight))/2.0;
+                if (imageHeight >= labelHeight) {
+                    imageEdgeInsets = UIEdgeInsetsMake(0, imageOffSetX, 0, -imageOffSetX);
+                    labelEdgeInsets = UIEdgeInsetsMake(labelHeight + gap + spacef, -labelOffSetX, -(labelHeight + gap + spacef), labelOffSetX);
+                    contentEdgeInsets = UIEdgeInsetsMake(0, - changeWidth / 2.0, spacef + labelHeight, -changeWidth / 2.0);
+                }else{
+                    imageEdgeInsets = UIEdgeInsetsMake(-(gap + imageHeight + spacef), imageOffSetX, gap + imageHeight + spacef, -imageOffSetX);
+                    labelEdgeInsets = UIEdgeInsetsMake(0, -labelOffSetX, 0, labelOffSetX);
+                    contentEdgeInsets = UIEdgeInsetsMake(spacef + imageHeight, - changeWidth / 2.0, 0, -changeWidth / 2.0);
+                }
+            }
+            break;
+        case QXButtonEdgeInsetsStyleLeft:
+        {
+            imageEdgeInsets = UIEdgeInsetsMake(0, -spacef/2.0, 0, spacef/2.0);
+            labelEdgeInsets = UIEdgeInsetsMake(0, spacef/2.0, 0, -spacef/2.0);
+            contentEdgeInsets = UIEdgeInsetsMake(0, spacef/2.0, 0, spacef/2.0);
+        }
+            break;
+        case QXButtonEdgeInsetsStyleBottom:
+        {
+            CGFloat gap = (maxHeight - MIN(imageHeight, labelHeight))/2.0;
+            if (imageHeight >= labelHeight) {
+                imageEdgeInsets = UIEdgeInsetsMake(0,
+                                                   imageOffSetX,
+                                                   0,
+                                                   -imageOffSetX);
+                labelEdgeInsets = UIEdgeInsetsMake(-(labelHeight + gap + spacef),
+                                                   -labelOffSetX,
+                                                   labelHeight + gap + spacef,
+                                                   labelOffSetX);
+                contentEdgeInsets = UIEdgeInsetsMake(spacef + labelHeight,
+                                                     - changeWidth / 2.0,
+                                                     0,
+                                                     -changeWidth / 2.0);
+            }else{
+                imageEdgeInsets = UIEdgeInsetsMake(gap + imageHeight + spacef,
+                                                   imageOffSetX,
+                                                   -(gap + imageHeight + spacef),
+                                                   -imageOffSetX);
+                labelEdgeInsets = UIEdgeInsetsMake(0,
+                                                   -labelOffSetX,
+                                                   0,
+                                                   labelOffSetX);
+                contentEdgeInsets = UIEdgeInsetsMake(0,
+                                                     - changeWidth / 2.0,
+                                                     spacef + imageHeight,
+                                                     -changeWidth / 2.0);
+            }
+
+        }
+            break;
+        case QXButtonEdgeInsetsStyleRight:
+        {
+            imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth+spacef/2.0, 0, -labelWidth-spacef/2.0);
+            labelEdgeInsets = UIEdgeInsetsMake(0, -imageWidth-spacef/2.0, 0, imageWidth+spacef/2.0);
+            contentEdgeInsets = UIEdgeInsetsMake(0, spacef/2.0, 0, spacef/2.0);
+        }
+            break;
+        default:
+            break;
+    }
+    
+    // 4.赋值
+    self.titleEdgeInsets = labelEdgeInsets;
+    self.imageEdgeInsets = imageEdgeInsets;
+    self.contentEdgeInsets = contentEdgeInsets;
+}
+@end