react-native/ReactKit/Base/RCTRootView.m

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// Copyright 2004-present Facebook. All Rights Reserved.
#import "RCTRootView.h"
#import "RCTBridge.h"
#import "RCTContextExecutor.h"
#import "RCTEventDispatcher.h"
#import "RCTKeyCommands.h"
#import "RCTLog.h"
#import "RCTRedBox.h"
#import "RCTTouchHandler.h"
#import "RCTUIManager.h"
#import "RCTUtils.h"
#import "RCTWebViewExecutor.h"
#import "UIView+ReactKit.h"
NSString *const RCTRootViewReloadNotification = @"RCTRootViewReloadNotification";
@implementation RCTRootView
{
RCTBridge *_bridge;
RCTTouchHandler *_touchHandler;
id <RCTJavaScriptExecutor> _executor;
}
static Class _globalExecutorClass;
+ (void)initialize
{
#if DEBUG
// Register Cmd-R as a global refresh key
[[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"r"
modifierFlags:UIKeyModifierCommand
action:^(UIKeyCommand *command) {
[self reloadAll];
}];
// Cmd-D reloads using the web view executor, allows attaching from Safari dev tools.
[[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"d"
modifierFlags:UIKeyModifierCommand
action:^(UIKeyCommand *command) {
_globalExecutorClass = [RCTWebViewExecutor class];
[self reloadAll];
}];
#endif
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super initWithCoder:aDecoder])) {
[self setUp];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame
{
if ((self = [super initWithFrame:frame])) {
self.backgroundColor = [UIColor whiteColor];
[self setUp];
}
return self;
}
- (void)setUp
{
// Every root view that is created must have a unique react tag.
// Numbering of these tags goes from 1, 11, 21, 31, etc
static NSInteger rootViewTag = 1;
self.reactTag = @(rootViewTag);
rootViewTag += 10;
// Add reload observer
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(reload)
name:RCTRootViewReloadNotification
object:nil];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)bundleFinishedLoading:(NSError *)error
{
if (error != nil) {
NSArray *stack = [[error userInfo] objectForKey:@"stack"];
if (stack) {
[[RCTRedBox sharedInstance] showErrorMessage:[error localizedDescription] withStack:stack];
} else {
[[RCTRedBox sharedInstance] showErrorMessage:[error localizedDescription] withDetails:[error localizedFailureReason]];
}
} else {
[_bridge registerRootView:self];
NSString *moduleName = _moduleName ?: @"";
NSDictionary *appParameters = @{
@"rootTag": self.reactTag,
@"initialProps": self.initialProperties ?: @{},
};
[_bridge enqueueJSCall:@"AppRegistry.runApplication"
args:@[moduleName, appParameters]];
}
}
- (void)loadBundle
{
// Clear view
[self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
if (!_scriptURL) {
return;
}
// Clean up
[self removeGestureRecognizer:_touchHandler];
[_executor invalidate];
[_bridge invalidate];
// Choose local executor if specified, followed by global, followed by default
_executor = [[_executorClass ?: _globalExecutorClass ?: [RCTContextExecutor class] alloc] init];
_bridge = [[RCTBridge alloc] initWithJavaScriptExecutor:_executor moduleInstances:nil];
_touchHandler = [[RCTTouchHandler alloc] initWithBridge:_bridge];
[self addGestureRecognizer:_touchHandler];
// Load the bundle
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:_scriptURL completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
// Handle general request errors
if (error) {
if ([[error domain] isEqualToString:NSURLErrorDomain]) {
NSDictionary *userInfo = @{
NSLocalizedDescriptionKey: @"Could not connect to development server. Ensure node server is running - run 'npm start' from ReactKit root",
NSLocalizedFailureReasonErrorKey: [error localizedDescription],
NSUnderlyingErrorKey: error,
};
error = [NSError errorWithDomain:@"JSServer"
code:error.code
userInfo:userInfo];
}
[self bundleFinishedLoading:error];
return;
}
// Parse response as text
NSStringEncoding encoding = NSUTF8StringEncoding;
if (response.textEncodingName != nil) {
CFStringEncoding cfEncoding = CFStringConvertIANACharSetNameToEncoding((CFStringRef)response.textEncodingName);
if (cfEncoding != kCFStringEncodingInvalidId) {
encoding = CFStringConvertEncodingToNSStringEncoding(cfEncoding);
}
}
NSString *rawText = [[NSString alloc] initWithData:data encoding:encoding];
// Handle HTTP errors
if ([response isKindOfClass:[NSHTTPURLResponse class]] && [(NSHTTPURLResponse *)response statusCode] != 200) {
NSDictionary *userInfo;
NSDictionary *errorDetails = RCTJSONParse(rawText, nil);
if ([errorDetails isKindOfClass:[NSDictionary class]]) {
userInfo = @{
NSLocalizedDescriptionKey: errorDetails[@"message"] ?: @"No message provided",
@"stack": @[@{
@"methodName": errorDetails[@"description"] ?: @"",
@"file": errorDetails[@"filename"] ?: @"",
@"lineNumber": errorDetails[@"lineNumber"] ?: @0
}]
};
} else {
userInfo = @{NSLocalizedDescriptionKey: rawText};
}
error = [NSError errorWithDomain:@"JSServer"
code:[(NSHTTPURLResponse *)response statusCode]
userInfo:userInfo];
[self bundleFinishedLoading:error];
return;
}
// Success!
[_bridge enqueueApplicationScript:rawText url:_scriptURL onComplete:^(NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^{
[self bundleFinishedLoading:error];
});
}];
}];
[task resume];
}
- (void)setScriptURL:(NSURL *)scriptURL
{
if ([_scriptURL isEqual:scriptURL]) {
return;
}
_scriptURL = scriptURL;
[self loadBundle];
}
- (BOOL)isReactRootView
{
return YES;
}
- (void)reload
{
[self loadBundle];
}
+ (void)reloadAll
{
[[NSNotificationCenter defaultCenter] postNotificationName:RCTRootViewReloadNotification object:nil];
}
@end