+ [ios] add feature timer

ios/sdk/WeexSDK/Sources/Bridge/WXBridgeContext.m

@@ -246,6 +246,10 @@ - (void)destroyInstance:(NSString *)instance
     if([self.insStack containsObject:instance]){
         [self.insStack removeObject:instance];
     }
+
+    if(_jsBridge){
+        [_jsBridge removeTimers:instance];
+    }
 
     if(self.sendQueue[instance]){
         [self.sendQueue removeObjectForKey:instance];

ios/sdk/WeexSDK/Sources/Bridge/WXJSCoreBridge.m

@@ -22,6 +22,7 @@
 #import "WXPolyfillSet.h"
 #import "JSValue+Weex.h"
 #import "WXJSExceptionProtocol.h"
+#import "WXSDKManager.h"
 
 #import <dlfcn.h>
 
@@ -31,6 +32,7 @@
 @interface WXJSCoreBridge ()
 
 @property (nonatomic, strong)  JSContext *jsContext;
+@property (nonatomic, strong)  NSMutableArray *timers;
 
 @end
 
@@ -45,6 +47,7 @@ - (instancetype)init
         if (WX_SYS_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
             _jsContext.name = @"Weex Context";
         }
+        _timers = [NSMutableArray new];
 
         __weak typeof(self) weakSelf = self;
 
@@ -58,6 +61,15 @@ - (instancetype)init
             } afterDelay:[timeout toDouble] / 1000];
         };
 
+        _jsContext[@"setTimeoutWeex"] = ^(JSValue *appid, JSValue *ret,JSValue *arg ) {
+            [weakSelf triggerTimeout:[appid toString] ret:[ret toString] arg:[arg toString]];
+        };
+
+        _jsContext[@"setIntervalWeex"] = ^(JSValue *appid, JSValue *ret,JSValue *arg) {
+            [weakSelf triggerInterval:[appid toString] ret:[ret toString] arg:[arg toString]];
+
+        };
+
         _jsContext[@"nativeLog"] = ^() {
             static NSDictionary *levelMap;
             static dispatch_once_t onceToken;
@@ -229,11 +241,76 @@ - (void)garbageCollect
 //    }
 }
 
+#pragma mark - Public
+-(void)removeTimers:(NSString *)instance
+{
+    if(instance && [_timers containsObject:instance])
+    {
+        [_timers removeObject:instance];
+    }
+}
+
 #pragma mark - Private
 
 - (void)triggerTimeout:(void(^)())block
 {
     block();
 }
 
+- (void)callBack:(NSDictionary *)dic
+{
+    if([dic objectForKey:@"appid"] && [_timers containsObject:[dic objectForKey:@"appid"]]) {
+        [[WXSDKManager bridgeMgr] callBack:[dic objectForKey:@"appid"] funcId:[dic objectForKey:@"ret"]  params:[dic objectForKey:@"arg"] keepAlive:NO];
+    }
+}
+
+
+- (void)callBackInterval:(NSDictionary *)dic
+{
+    if([dic objectForKey:@"appid"] && [_timers containsObject:[dic objectForKey:@"appid"]]) {
+        [[WXSDKManager bridgeMgr] callBack:[dic objectForKey:@"appid"] funcId:[dic objectForKey:@"ret"]  params:nil keepAlive:YES];
+        [self triggerInterval:[dic objectForKey:@"appid"] ret:[dic objectForKey:@"ret"] arg:[dic objectForKey:@"arg"]];
+    }
+
+}
+
+- (void)triggerTimeout:(NSString *)appid ret:(NSString *)ret arg:(NSString *)arg
+{
+
+    double interval = [arg doubleValue]/1000.0f;
+    if(WXFloatEqual(interval,0)) {
+        return;
+    }
+    if(![_timers containsObject:appid]){
+        [_timers addObject:appid];
+    }
+    dispatch_time_t time = dispatch_time(DISPATCH_TIME_NOW, interval*NSEC_PER_SEC);
+    dispatch_after(time, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSMutableDictionary *dic = [NSMutableDictionary new];
+        [dic setObject:appid forKey:@"appid"];
+        [dic setObject:ret forKey:@"ret"];
+        [dic setObject:arg forKey:@"arg"];
+        [self performSelector:@selector(callBack:) withObject:dic ];
+    });
+}
+
+- (void)triggerInterval:(NSString *)appid ret:(NSString *)ret arg:(NSString *)arg
+{
+    double interval = [arg doubleValue]/1000.0f;
+    if(WXFloatEqual(interval,0)) {
+        return;
+    }
+    if(![_timers containsObject:appid]){
+        [_timers addObject:appid];
+    }
+    dispatch_time_t time = dispatch_time(DISPATCH_TIME_NOW, interval*NSEC_PER_SEC);
+    dispatch_after(time, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        NSMutableDictionary *dic = [NSMutableDictionary new];
+        [dic setObject:appid forKey:@"appid"];
+        [dic setObject:ret forKey:@"ret"];
+        [dic setObject:arg forKey:@"arg"];
+        [self performSelector:@selector(callBackInterval:) withObject:dic ];
+    });
+}
+
 @end

ios/sdk/WeexSDK/Sources/Protocol/WXBridgeProtocol.h

@@ -44,6 +44,11 @@ typedef void (^WXJSCallNativeComponent)(NSString *instanceId, NSString *componen
  */
 - (void)resetEnvironment;
 
+/**
+ * Remove instance's timer.
+ */
+-(void)removeTimers:(NSString *)instance;
+
 @optional
 
 /**