Add an activity source for mail composer.

ActivityMailItemSource.h

@@ -0,0 +1,10 @@
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+@interface ActivityMailItemSource : NSObject<UIActivityItemSource>
++(instancetype)itemSourceWithText:(NSString*)text;
+
+-(instancetype)initWithText:(NSString*)text;
+
+@end

ActivityMailItemSource.m

@@ -0,0 +1,37 @@
+#import "ActivityMailItemSource.h"
+
+@interface ActivityMailItemSource()
+@property (nonatomic) NSString* text;
+@end
+
+@implementation ActivityMailItemSource
+
++(instancetype)itemSourceWithText:(NSString*)text{
+    return [[ActivityMailItemSource alloc] initWithText:text];
+}
+
+
+-(instancetype)initWithText:(NSString*)text{
+    self = [super init];
+    if(self){
+        self.text = text;
+    }
+    return self;
+}
+
+#pragma mark - UIActivityItemSource protocol
+- (id)activityViewControllerPlaceholderItem:(UIActivityViewController *)activityViewController{
+    return @"";
+}
+
+- (id)activityViewController:(UIActivityViewController *)activityViewController itemForActivityType:(NSString *)activityType{
+    return self.text;
+}
+
+- (NSString *)activityViewController:(UIActivityViewController *)activityViewController subjectForActivityType:(NSString *)activityType{
+    if([UIActivityTypeMail isEqualToString:activityType])
+        return self.text;
+    return nil;
+}
+
+@end

ActivityView.m

@@ -3,6 +3,7 @@
 #import "RCTBridge.h"
 #import "RCTUIManager.h"
 #import "RCTImageLoader.h"
+#import "ActivityMailItemSource.h"
 
 @implementation ActivityView
 
@@ -110,7 +111,7 @@ - (void) showWithOptions:(NSDictionary *)args image:(UIImage *)image
     }
 
     if (text) {
-        [shareObject addObject:text];
+        [shareObject addObject:[ActivityMailItemSource itemSourceWithText:text]];
     }
 
     if (url) {

ActivityView.xcodeproj/project.pbxproj

@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		13BE3DEE1AC21097009241FE /* ActivityView.m in Sources */ = {isa = PBXBuildFile; fileRef = 13BE3DED1AC21097009241FE /* ActivityView.m */; };
+		DF3E79531C9BFBEA0054A8C8 /* ActivityMailItemSource.m in Sources */ = {isa = PBXBuildFile; fileRef = DF3E79521C9BFBEA0054A8C8 /* ActivityMailItemSource.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -26,6 +27,8 @@
 		134814201AA4EA6300B7C361 /* libActivityView.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libActivityView.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		13BE3DEC1AC21097009241FE /* ActivityView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ActivityView.h; sourceTree = "<group>"; };
 		13BE3DED1AC21097009241FE /* ActivityView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ActivityView.m; sourceTree = "<group>"; };
+		DF3E79511C9BFBEA0054A8C8 /* ActivityMailItemSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ActivityMailItemSource.h; sourceTree = "<group>"; };
+		DF3E79521C9BFBEA0054A8C8 /* ActivityMailItemSource.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ActivityMailItemSource.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -52,6 +55,8 @@
 			children = (
 				13BE3DEC1AC21097009241FE /* ActivityView.h */,
 				13BE3DED1AC21097009241FE /* ActivityView.m */,
+				DF3E79511C9BFBEA0054A8C8 /* ActivityMailItemSource.h */,
+				DF3E79521C9BFBEA0054A8C8 /* ActivityMailItemSource.m */,
 				134814211AA4EA7D00B7C361 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -112,6 +117,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				DF3E79531C9BFBEA0054A8C8 /* ActivityMailItemSource.m in Sources */,
 				13BE3DEE1AC21097009241FE /* ActivityView.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;