Fix top issues: Proguard rules, iOS deprecation, and Windows crash

README.md

@@ -72,6 +72,14 @@ Fluttertoast.showToast(
 Fluttertoast.cancel()
 ```
 
+### Note Android Proguard
+
+If you are using proguard in your app, you must add the following rules to your `proguard-rules.pro` file. Otherwise, toasts will not be visible in a release build.
+
+```
+-keep class io.github.ponnamkarthik.toast.** { *; }
+```
+
 ### Note Android
 
 <img src="https://raw.githubusercontent.com/ponnamkarthik/FlutterToast/master/screenshot/toast_deprecated_setview.png" height="200px" />

ios/fluttertoast/Sources/fluttertoast/UIView+Toast.m

@@ -395,7 +395,13 @@ - (void)makeToastActivity:(id)position {
         activityView.layer.shadowOffset = style.shadowOffset;
     }
 
-    UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
+    UIActivityIndicatorView *activityIndicatorView;
+    if (@available(iOS 13.0, *)) {
+        activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleLarge];
+        activityIndicatorView.color = [UIColor whiteColor];
+    } else {
+        activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
+    }
     activityIndicatorView.center = CGPointMake(activityView.bounds.size.width / 2, activityView.bounds.size.height / 2);
     [activityView addSubview:activityIndicatorView];
     [activityIndicatorView startAnimating];

lib/fluttertoast.dart

@@ -53,7 +53,12 @@ class Fluttertoast {
   /// Let say you have an active show
   /// Use this method to hide the toast immediately
   static Future<bool?> cancel() async {
-    bool? res = await _channel.invokeMethod("cancel");
+    bool? res;
+    try {
+      res = await _channel.invokeMethod("cancel");
+    } on MissingPluginException {
+      // Ignore MissingPluginException for unsupported platforms like Windows
+    }
     isCurrentlyShowingToast = false;  // Update variable
     return res;
   }
@@ -119,7 +124,12 @@ class Fluttertoast {
 
     isCurrentlyShowingToast = true;  // Update variable
 
-    bool? res = await _channel.invokeMethod('showToast', params);
+    bool? res;
+    try {
+      res = await _channel.invokeMethod('showToast', params);
+    } on MissingPluginException {
+      // Ignore MissingPluginException for unsupported platforms like Windows
+    }
 
     // Assuming the platform will invoke 'cancel' method after showing toast
     Future.delayed(Duration(seconds: timeInSecForIosWeb), () {