处理键盘崩溃

CustomKeyboard/View/KBToolBar.m

@@ -9,6 +9,7 @@
 #import "KBResponderUtils.h" // 查找 UIInputViewController，用于系统切换输入法
 #import "KBBackspaceUndoManager.h"
 #import "KBSkinManager.h"
+#import <ImageIO/ImageIO.h>
 
 @interface KBToolBar ()
 @property (nonatomic, strong) UIView *leftContainer;
@@ -20,6 +21,8 @@
 @property (nonatomic, assign) BOOL kbNeedsInputModeSwitchKey;
 @property (nonatomic, assign) BOOL kbUndoVisible;
 @property (nonatomic, assign) BOOL kbAvatarVisible;
+@property (nonatomic, copy, nullable) NSString *kb_cachedPersonaCoverPath;
+@property (nonatomic, strong, nullable) UIImage *kb_cachedPersonaCoverImage;
 @end
 
 @implementation KBToolBar
@@ -256,10 +259,41 @@
         [[containerURL path] stringByAppendingPathComponent:@"persona_cover.jpg"];
     if (imagePath.length == 0 ||
         ![[NSFileManager defaultManager] fileExistsAtPath:imagePath]) {
+        self.kb_cachedPersonaCoverPath = nil;
+        self.kb_cachedPersonaCoverImage = nil;
         return nil;
     }
 
-    return [UIImage imageWithContentsOfFile:imagePath];
+    if (self.kb_cachedPersonaCoverImage &&
+        [self.kb_cachedPersonaCoverPath isEqualToString:imagePath]) {
+        return self.kb_cachedPersonaCoverImage;
+    }
+
+    // 头像仅 40pt，直接按像素上限缩略解码，避免每次显示键盘都 full decode 一张大 JPG 顶爆扩展内存。
+    NSUInteger maxPixel = 256;
+    NSURL *url = [NSURL fileURLWithPath:imagePath];
+    CGImageSourceRef source = CGImageSourceCreateWithURL((__bridge CFURLRef)url, NULL);
+    if (!source) {
+        return nil;
+    }
+    NSDictionary *opts = @{
+        (__bridge id)kCGImageSourceCreateThumbnailFromImageAlways : @YES,
+        (__bridge id)kCGImageSourceCreateThumbnailWithTransform : @YES,
+        (__bridge id)kCGImageSourceThumbnailMaxPixelSize : @(maxPixel),
+    };
+    CGImageRef cg = CGImageSourceCreateThumbnailAtIndex(source, 0, (__bridge CFDictionaryRef)opts);
+    CFRelease(source);
+    if (!cg) {
+        return nil;
+    }
+    UIImage *img = [UIImage imageWithCGImage:cg
+                                       scale:[UIScreen mainScreen].scale
+                                 orientation:UIImageOrientationUp];
+    CGImageRelease(cg);
+
+    self.kb_cachedPersonaCoverPath = imagePath;
+    self.kb_cachedPersonaCoverImage = img;
+    return img;
 }
 
 #pragma mark - Actions