Use collection and box literals in ObjC code (#3960)

Replaces the harder-to-read and more-error-prone
dictionaryWithObjectsAndKeys: and dictionaryWithObject:forKey: with
modern dictionary literals.

Also replaces numberWith*: with boxed literal syntax.

Author: stuartmorgan-g

packages/camera/camera/ios/Classes/CameraPlugin.m

@@ -1169,12 +1169,12 @@ - (BOOL)setupWriterForPath:(NSString *)path {
     acl.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
     NSDictionary *audioOutputSettings = nil;
     // Both type of audio inputs causes output video file to be corrupted.
-    audioOutputSettings = [NSDictionary
-        dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:kAudioFormatMPEG4AAC], AVFormatIDKey,
-                                     [NSNumber numberWithFloat:44100.0], AVSampleRateKey,
-                                     [NSNumber numberWithInt:1], AVNumberOfChannelsKey,
-                                     [NSData dataWithBytes:&acl length:sizeof(acl)],
-                                     AVChannelLayoutKey, nil];
+    audioOutputSettings = @{
+      AVFormatIDKey : [NSNumber numberWithInt:kAudioFormatMPEG4AAC],
+      AVSampleRateKey : [NSNumber numberWithFloat:44100.0],
+      AVNumberOfChannelsKey : [NSNumber numberWithInt:1],
+      AVChannelLayoutKey : [NSData dataWithBytes:&acl length:sizeof(acl)],
+    };
     _audioWriterInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio
                                                            outputSettings:audioOutputSettings];
     _audioWriterInput.expectsMediaDataInRealTime = YES;

packages/google_maps_flutter/google_maps_flutter/ios/Classes/GoogleMapController.m

@@ -329,7 +329,7 @@ - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     NSNumber* isCompassEnabled = @(_mapView.settings.compassButton);
     result(isCompassEnabled);
   } else if ([call.method isEqualToString:@"map#isMapToolbarEnabled"]) {
-    NSNumber* isMapToolbarEnabled = [NSNumber numberWithBool:NO];
+    NSNumber* isMapToolbarEnabled = @NO;
     result(isMapToolbarEnabled);
   } else if ([call.method isEqualToString:@"map#getMinMaxZoomLevels"]) {
     NSArray* zoomLevels = @[ @(_mapView.minZoom), @(_mapView.maxZoom) ];
@@ -340,7 +340,7 @@ - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     NSNumber* isZoomGesturesEnabled = @(_mapView.settings.zoomGestures);
     result(isZoomGesturesEnabled);
   } else if ([call.method isEqualToString:@"map#isZoomControlsEnabled"]) {
-    NSNumber* isZoomControlsEnabled = [NSNumber numberWithBool:NO];
+    NSNumber* isZoomControlsEnabled = @NO;
     result(isZoomControlsEnabled);
   } else if ([call.method isEqualToString:@"map#isTiltGesturesEnabled"]) {
     NSNumber* isTiltGesturesEnabled = @(_mapView.settings.tiltGestures);

packages/image_picker/image_picker/ios/Classes/FLTImagePickerPhotoAssetUtil.m

@@ -98,11 +98,11 @@ + (NSString *)saveImageWithMetaData:(NSDictionary *)metaData
   CGImageDestinationRef destination = CGImageDestinationCreateWithURL(
       (CFURLRef)[NSURL fileURLWithPath:path], kUTTypeGIF, gifInfo.images.count, NULL);
 
-  NSDictionary *frameProperties = [NSDictionary
-      dictionaryWithObject:[NSDictionary
-                               dictionaryWithObject:[NSNumber numberWithFloat:gifInfo.interval]
-                                             forKey:(NSString *)kCGImagePropertyGIFDelayTime]
-                    forKey:(NSString *)kCGImagePropertyGIFDictionary];
+  NSDictionary *frameProperties = @{
+    (__bridge NSString *)kCGImagePropertyGIFDictionary : @{
+      (__bridge NSString *)kCGImagePropertyGIFDelayTime : @(gifInfo.interval),
+    },
+  };
 
   NSMutableDictionary *gifMetaProperties = [NSMutableDictionary dictionaryWithDictionary:metaData];
   NSMutableDictionary *gifProperties =
@@ -111,7 +111,7 @@ + (NSString *)saveImageWithMetaData:(NSDictionary *)metaData
     gifProperties = [NSMutableDictionary dictionary];
   }
 
-  gifProperties[(NSString *)kCGImagePropertyGIFLoopCount] = [NSNumber numberWithFloat:0];
+  gifProperties[(__bridge NSString *)kCGImagePropertyGIFLoopCount] = @0;
 
   CGImageDestinationSetProperties(destination, (CFDictionaryRef)gifMetaProperties);
 

packages/image_picker/image_picker/ios/Classes/FLTImagePickerPlugin.m

@@ -348,7 +348,7 @@ - (NSNumber *)getDesiredImageQuality:(NSNumber *)imageQuality {
   if (![imageQuality isKindOfClass:[NSNumber class]]) {
     imageQuality = @1;
   } else if (imageQuality.intValue < 0 || imageQuality.intValue > 100) {
-    imageQuality = [NSNumber numberWithInt:1];
+    imageQuality = @1;
   } else {
     imageQuality = @([imageQuality floatValue] / 100);
   }

packages/in_app_purchase/in_app_purchase_ios/ios/Classes/InAppPurchasePlugin.m

@@ -106,7 +106,7 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
 }
 
 - (void)canMakePayments:(FlutterResult)result {
-  result([NSNumber numberWithBool:[SKPaymentQueue canMakePayments]]);
+  result(@([SKPaymentQueue canMakePayments]));
 }
 
 - (void)getPendingTransactions:(FlutterResult)result {

packages/in_app_purchase/in_app_purchase_ios/ios/Tests/InAppPurchasePluginTest.m

@@ -51,7 +51,7 @@ - (void)testCanMakePayments {
                            result = r;
                          }];
   [self waitForExpectations:@[ expectation ] timeout:5];
-  XCTAssertEqual(result, [NSNumber numberWithBool:YES]);
+  XCTAssertEqual(result, @YES);
 }
 
 - (void)testGetProductResponse {

packages/webview_flutter/ios/Classes/FLTWKProgressionDelegate.m

@@ -34,8 +34,7 @@ - (void)observeValueForKeyPath:(NSString *)keyPath
     NSNumber *newValue =
         change[NSKeyValueChangeNewKey] ?: 0;          // newValue is anywhere between 0.0 and 1.0
     int newValueAsInt = [newValue floatValue] * 100;  // Anywhere between 0 and 100
-    [_methodChannel invokeMethod:@"onProgress"
-                       arguments:@{@"progress" : [NSNumber numberWithInt:newValueAsInt]}];
+    [_methodChannel invokeMethod:@"onProgress" arguments:@{@"progress" : @(newValueAsInt)}];
   }
 }
 

packages/webview_flutter/ios/Classes/FlutterWebView.m

@@ -194,12 +194,12 @@ - (void)onLoadUrl:(FlutterMethodCall*)call result:(FlutterResult)result {
 
 - (void)onCanGoBack:(FlutterMethodCall*)call result:(FlutterResult)result {
   BOOL canGoBack = [_webView canGoBack];
-  result([NSNumber numberWithBool:canGoBack]);
+  result(@(canGoBack));
 }
 
 - (void)onCanGoForward:(FlutterMethodCall*)call result:(FlutterResult)result {
   BOOL canGoForward = [_webView canGoForward];
-  result([NSNumber numberWithBool:canGoForward]);
+  result(@(canGoForward));
 }
 
 - (void)onGoBack:(FlutterMethodCall*)call result:(FlutterResult)result {
@@ -314,12 +314,12 @@ - (void)onScrollBy:(FlutterMethodCall*)call result:(FlutterResult)result {
 
 - (void)getScrollX:(FlutterMethodCall*)call result:(FlutterResult)result {
   int offsetX = _webView.scrollView.contentOffset.x;
-  result([NSNumber numberWithInt:offsetX]);
+  result(@(offsetX));
 }
 
 - (void)getScrollY:(FlutterMethodCall*)call result:(FlutterResult)result {
   int offsetY = _webView.scrollView.contentOffset.y;
-  result([NSNumber numberWithInt:offsetY]);
+  result(@(offsetY));
 }
 
 // Returns nil when successful, or an error message when one or more keys are unknown.