fix 内存泄漏(当targetSize传值为PHImageManagerMaximumSize时,...

fix 内存泄漏(当targetSize传值为PHImageManagerMaximumSize时, requestImageForAsset方法调用会产生内存泄漏. 用"requestImageDataForAsset"方法替换)

TZImagePickerController/TZImagePickerController/TZImageManager.m

@@ -467,10 +467,10 @@ static dispatch_once_t onceToken;
         [option setProgressHandler:progressHandler];
     }
     option.resizeMode = PHImageRequestOptionsResizeModeFast;
-    return [[PHImageManager defaultManager] requestImageForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFit options:option resultHandler:^(UIImage *result, NSDictionary *info) {
+    return [[PHImageManager defaultManager] requestImageDataForAsset:asset options:option resultHandler:^(NSData * _Nullable imageData, NSString * _Nullable dataUTI, UIImageOrientation orientation, NSDictionary * _Nullable info) {
             BOOL cancelled = [[info objectForKey:PHImageCancelledKey] boolValue];
-        if (!cancelled && result) {
-            result = [self fixOrientation:result];
+            if (!cancelled && imageData) {
+                UIImage *result = [self fixOrientation:[UIImage imageWithData:imageData]];
                 BOOL isDegraded = [[info objectForKey:PHImageResultIsDegradedKey] boolValue];
                 if (completion) completion(result,info,isDegraded);
             }