1.求大师分享,码论告诉我这个红绿背景主是码论什么指标公式源码。那里可以?
2.setState是码论同步更新还是异步更新?
3.怎样导入Java源程序?
求大师分享,告诉我这个红绿背景主是码论什么指标公式源码。那里可以?
NA:=STRCAT(CON2STR(YEAR,码论0),' 年 ');
YA:=STRCAT(CON2STR(MONTH,0),' 月 ');
RA:=STRCAT(CON2STR(DAY,0),' 日 ');
SJ:=STRCAT(STRCAT(NA,YA), RA);
DRAWTEXT_FIX(C>0,0.,0,0,SJ);
{ 布林+宝塔+蓝灰操盘}
{ 蓝灰底}
买线:=EMA(C,2);
卖线:=EMA(SLOPE(C,)*+C,);
STICKLINE(买线>=卖线,HHV(H,),LLV(L,),5,0),COLOR;
STICKLINE(买线<卖线,HHV(H,),LLV(L,),5,0),COLOR;
{ 红轨道}
红轨道:=MA(MA(CLOSE,3),1),LINETHICK1,COLORYELLOW;
轨道:MA(MA(CLOSE,3),3),COLORCD,LINETHICK2;
SHENG:=IF(红轨道>=轨道,轨道,DRAWNULL);
升:SHENG,COLORMAGENTA,LINETHICK2;
{ 变色K线}
N1:=;
M:=6;
TR1:=EXPMEMA(MAX(MAX(HIGH-LOW,ABS(HIGH-REF(CLOSE,1))),ABS(REF(CLOSE,1)-LOW)),N1);
HD :=HIGH-REF(HIGH,1);
LD :=REF(LOW,1)-LOW;
DMP:=EXPMEMA(IF(HD>0&&HD>LD,HD,0),N1);
DMM:=EXPMEMA(IF(LD>0&&LD>HD,LD,0),N1);
PDI:=DMP*/TR1,LINETHICK2;
MDI:=DMM*/TR1;
ADX:=EXPMEMA(ABS(MDI-PDI)/(MDI+PDI)*,M);
ADXR:=EXPMEMA(ADX,M);
VAR1:=CLOSE>REF(CLOSE,1) AND CLOSE>REF(CLOSE,2);
VAR2:=REF(VAR1,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR3:=REF(VAR2,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR4:=REF(VAR3,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR5:=REF(VAR4,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR6:=REF(VAR5,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR7:=REF(VAR6,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR8:=REF(VAR7,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR9:=REF(VAR8,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARA:=REF(VAR9,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VARB:=REF(VARA,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARC:=REF(VARB,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
STICKLINE(VAR1 OR VAR2 OR VAR3 OR VAR4 OR VAR5 OR VAR6 OR VAR7 OR VAR8 OR VAR9 OR VARA OR VARB OR VARC,CLOSE,REF(CLOSE,1),3,1),COLORFF;
VARD:=CLOSE<REF(CLOSE,1) AND CLOSE<REF(CLOSE,2);
VARE:=REF(VARD,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARF:=REF(VARE,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR:=REF(VARF,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR:=REF(VAR,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
STICKLINE(VARD OR VARE OR VARF OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR,CLOSE,REF(CLOSE,1),3,0),COLORC;
VAR:=REF(VARD OR VARE OR VARF OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR OR VAR,1) AND VAR1;
STICKLINE(VAR,REF(CLOSE,1),REF(CLOSE,2),3,0),COLORMAGENTA ;
VAR1A:=REF(VAR1 OR VAR2 OR VAR3 OR VAR4 OR VAR5 OR VAR6 OR VAR7 OR VAR8 OR VAR9 OR VARA OR VARB OR VARC,1) AND VARD;
STICKLINE(VAR1A,REF(CLOSE,1),REF(CLOSE,2),3,0) ,COLORFF; }
{ 箱体线}
N:=7;
T1:=CONST(LLVBARS(LOW,N));
T1HIGH:=CONST(REF(HIGH,T1));
CC:=CONST(CURRBARSCOUNT);
T2:=CONST(BARSLAST((CURRBARSCOUNT >(CC+T1)) AND (HIGH>T1HIGH)));
T2HIGH:=CONST(REF(HIGH,T2));
T3:=CONST(BARSLAST((CURRBARSCOUNT >(CC+T2)) AND (HIGH>T2HIGH)));
T3HIGH:=CONST(REF(HIGH,T3));
突破杀入线:DRAWLINE(CURRBARSCOUNT=T3+1, T3HIGH, ISLASTBAR, T3HIGH, 1),LINETHICK1,COLORYELLOW;
DRAWTEXT(ISLASTBAR, T3HIGH, '杀入线!'),LINETHICK1,COLORYELLOW;
AB:=EMA(((2*C+H+L)/4-LLV(LOW,))/(HHV(HIGH,)-LLV(LOW,))*,8);
BA:=EMA(AB,5);
A1{ 高}:=REFDATE(REF(HHV(H,),5),DATE);
B1{ 低}:=REFDATE(REF(LLV(L,),5),DATE);
DY{ 中}:=((A1)+(B1))/2;
箱顶:IF(AB>0 AND AB-BA<=0,A1,A1),COLORGREEN,DOTLINE;
箱腰:IF(AB>0 AND AB-BA<=0,DY,DY),COLORYELLOW,DOTLINE;
箱低:IF(AB>0 AND AB-BA<=0,B1,B1),COLORRED,DOTLINE;
DRAWTEXT(ISLASTBAR,箱顶,'箱顶'),COLORYELLOW;
DRAWTEXT(ISLASTBAR,箱腰,'箱腰'),COLORYELLOW;
DRAWTEXT(ISLASTBAR,箱低,'箱低'),COLORYELLOW;
VARAA:=IF(CLOSE>,.3,0.);
{ 突破:INTPART(CLOSE/VARAA )*VARAA,POINTDOT,LINETHICK4,COLORRED;
再突破:突破+VARAA,POINTDOT,LINETHICK4,COLORFF ;
回踩:(突破+再突破)/2,POINTDOT,COLORWHITE,LINETHICK4;}
STICKLINE(CROSS(ZIG(3,5),REF(ZIG(3,5),1)),箱低,箱腰,0.1,-1),COLORRED;
STICKLINE(CROSS(REF(ZIG(3,5),1),ZIG(3,5)),箱顶,箱腰,0.1,-1),COLORGREEN;
DRAWICON(CROSS(ZIG(3,5),REF(ZIG(3,5),1)),箱腰,1);
DRAWICON(CROSS(REF(ZIG(3,5),1),ZIG(3,5)),箱腰,2);
DRAWTEXT_FIX(CURRBARSCOUNT=1,0.,0.,0,'K线底部出红色或粉色,可低吸建仓!码论多乐麻将源码'),码论COLORRED;
DRAWTEXT_FIX(CURRBARSCOUNT=1,0.,0.,0,'绿点表示长期的压力点!'),码论COLORGREEN;
DRAWTEXT_FIX(CURRBARSCOUNT=1,0.,0.,0,'白点表示中短期的压力和支撑点,'),码论COLORGREEN;
DRAWTEXT_FIX(CURRBARSCOUNT=1,0.,0.,0,'红点表示有效支撑或突破长中短期压力点!股价向下跌破,码论原则清仓!码论'),码论COLORGREEN;
EE:=(H+L+O+2*C)/5;
CRTP:=EE+(H-L);
CRZL:=2*EE-L;
CRZC:=2*EE-H;
CRFZ:=EE-(H-L);
高:CONST(CRTP),COLORRED;
阻:CONST(CRZL),COLORC7C9FF;
支:CONST(CRZC),COLOR7C9CFF;
反:CONST(CRFZ),COLORDDDD;
DRAWTEXT(ISLASTBAR, 反, '反转价'),LINETHICK1,COLORDDDD;
DRAWTEXT(ISLASTBAR, 支, '支撑'),LINETHICK1,COLOR7C9CFF;
DRAWTEXT(ISLASTBAR, 阻, '阻力'),LINETHICK1,COLORC7C9FF;
DRAWTEXT(ISLASTBAR, 高, ' 高破线'),LINETHICK1,COLORGREEN;
均线:=EXPMA(C,),COLORGRAY,LINETHICK2;
日:=;
昨前:=3;
高2:=REF(HHV(H,日),昨前);
低2:=REF(LLV(L,日),昨前);
H4:=高2-(高2-低2)*0.;
H5:=高2-(高2-低2)*0.;
支撑.9%:REFDATE(H5,DATE),COLORRED;
支撑.8%:REFDATE(H4,DATE),COLORGREEN,;
STICKLINE(CURRBARSCOUNT=1,支撑.9%,支撑.9%,,-1),COLORGREEN;
STICKLINE(CURRBARSCOUNT=1,支撑.8%,支撑.8%,,-1),COLORRED;
DRAWTEXT(CURRBARSCOUNT=1 AND 支撑.9%,支撑.9%,'备钱'),COLORGREEN;
DRAWTEXT(CURRBARSCOUNT=1 AND 支撑.8%,支撑.8%,'转运'),COLORRED;
WH1:=IF(L=LLV(L,9),L,0);
WH2:=CONST(BARSLAST(WH1!=0));
WH3:=CONST(IF(WH2=0,H,REF(H,WH2)));
WH4:=CONST(REF(BARSLAST(H>WH3),WH2+1)+WH2+1);
WH5:=CONST(IF(WH4=0,H,REF(H,WH4)));
WH6:=CONST(REF(BARSLAST(H>WH5),WH4+1)+WH4+1);
WH7:IF(CURRBARSCOUNT<=WH2+,CONST(IF(WH6=0,H,REF(H,WH6))),DRAWNULL),COLORRED,DOTLINE;
STICKLINE(CURRBARSCOUNT<=WH2+1 AND L=LLV(L,9),O,C,3,0),COLORRED;
DRAWTEXT(CURRBARSCOUNT=WH2+,WH7,'LINE'),COLORRED;
DRAWTEXT(ISLASTBAR,WH7,'进场'),COLORRED;
WH8:IF(CURRBARSCOUNT<=WH2+1,IF(L=LLV(L,9),L,DRAWNULL),DRAWNULL),CIRCLEDOT;
H:=IF(H=HHV(H,9),H,DRAWNULL);
H:=CONST(BARSLAST(H!=DRAWNULL));
H:=CONST(IF(H=0,L,REF(L,H)));
H:=CONST(REF(BARSLAST(L<H),H+1)+H+1);
H:=CONST(IF(H=0,L,REF(L,H)));
H:=CONST(REF(BARSLAST(L<H),H+1)+H+1);
H:=IF(CURRBARSCOUNT<=H+,CONST(IF(H=0,L,REF(L,H))),DRAWNULL),DOTLINE;
H:=IF(CURRBARSCOUNT<=H+1,IF(H=HHV(H,9),H,DRAWNULL),DRAWNULL),CIRCLEDOT;
DRAWTEXT(CURRBARSCOUNT=H+,H,'LINE'),COLORYELLOW;
DRAWTEXT(ISLASTBAR,H,'止损'),COLORYELLOW;
DIF:=EMA(DCLOSE,)-EMA(DCLOSE,);
DEA:=EMA(DIF,9);
AAA:=(DIF-DEA)*2*;
起爆:=CROSS(AAA-REF(AAA,1),);
DRAWTEXT(起爆,MA(L,3),'↖暴张'),COLORYELLOW,LINETHICK2;
LC:=REF((O+H+L+2*C)/5,1);
{ 短线擒黑码}
RSI:=SMA(MAX(C-LC,0),7,1)/SMA(ABS(C-LC),7,1)*;
TYP:=(HIGH+LOW+CLOSE)/3;
CCI:=(TYP-MA(TYP,))/(0.*AVEDEV(TYP,));
买:=CROSS(RSI,7.1) AND MA(V,5)>MA(V,),COLORRED;
DRAWTEXT(CROSS(RSI,7.1) AND MA(V,5)>MA(V,),MA(L,3),'↖◆短线擒黑码◆'),COLORWHITE;
DRAWICON(买,MA(L,3),);
卖:=CROSS(7.1,RSI) AND MA(V,)>MA(V,5),COLORGREEN;
DRAWTEXT(CROSS(7.1,RSI) AND MA(V,)>MA(V,5),箱顶,'■■逃跑■■'),COLORGREEN;
DRAWICON(卖,MA(H,3),);
{ 绝密买点}
A:=EMA(C,3),COLORWHITE;
A:=EMA(C,5),COLORYELLOW;
A:=EMA(C,7),COLORMAGENTA;
A:=EMA(C,),COLORGREEN;
A:=EMA(C,),COLORRED;
A:=EMA(C,),COLORBLUE,LINETHICK2;
SS8:=CROSS(A,A) AND C>O AND C>REF(C,1) AND C/REF(C,1)>=1. ;
SSS8:=CROSS(A,A) AND C>O AND C>REF(C,1) AND C/REF(C,1)>=1.;
DRAWICON(SS8 ,MA(L,3),5);
DRAWTEXT(SS8,MA(L,3),'↖绝密买点'),COLORYELLOW;
ZYX1:="DMI.PDI"(,6);
ZYX2:="DMI.MDI"(,6);
ZYX3:=ZYX1> AND ZYX1>REF(ZYX1,1);
ZYX4:=LLV(ZYX1,0);
ZYX5:=BARSLAST(ZYX4=ZYX1);
ZYX6:=(0-REF(ZYX2,4))/(ZYX4-REF(ZYX2,ZYX5))>2;
ZYX7:=ZYX1>REF(ZYX1,1);
ZYX8:=VOL>2*MA(VOL,);
ZYX9:="DMI.ADX"(,6);
ZYXA:="DMI.ADXR"(,6);
ZYXB:=CLOSE>MA(CLOSE,) AND CLOSE<MA(CLOSE,)*1.;
ZYXC:=MA(CLOSE,)>REF(MA(CLOSE,),1);
ZYXD:=BARSLAST(CROSS(MA(CLOSE,5),MA(CLOSE,)))<BARSLAST(CROSS(MA(CLOSE,),MA(CLOSE,5)));
{ ZYXE:=0-"MACD.DIFF"(7,,3);}
ZYXF:=TROUGHBARS(3,,1)<4;
ZYX:=EMA(CLOSE,)>REF(EMA(CLOSE,),2);
ZYX:=IF(ZYXF=1,,0);
ZYX:=CROSS(ZYX2,ZYX1) AND CROSS(ZYXA,ZYX9);
ZYX:=CROSS(ZYX2,ZYX1) AND CROSS(ZYX9,ZYXA);
ZYX:=ZYXB AND ZYXC AND ZYXD AND ZYX AND ZYX6 AND ZYX7 AND ZYX8*;
ZYX:=BARSLAST(CROSS(ZYX2,ZYX1)=1);
ZYX:=BARSLAST(CROSS(ZYX1,ZYX2)=1);
ZYX:=HHV(ZYX1,ZYX);
ZYX:=BARSLAST(ZYX1=ZYX);
{ STICKLINE(FILTER(ZYXF=1,5),,0,,0),COLORRED;}
ZYX:=ZYX3 OR ZYX OR ZYX*;
ZYX1A:=ZYX*;
DRAWICON(FILTER(ZYXF=1,3),MA(L,3),);
DRAWTEXT(FILTER(ZYXF=1,3),箱低,'■■铁底■■'),COLORGREEN;
{ 量能平台}
ND:=;
PTD:=CONST(LLVBARS(V,ND));
TDPX:IF(CURRBARSCOUNT<=ND,CONST(IF(PTD=0,O,REF(O,PTD))),DRAWNULL),COLORFF;
IF(CURRBARSCOUNT=PTD+1,TDPX,DRAWNULL),CIRCLEDOT,COLORFF,LINETHICK2;
DRAWTEXT(ISLASTBAR,TDPX,' 地平线'),COLORFF;
G:=;
T:=CONST(HHVBARS(V,G));
T:=IF(CURRBARSCOUNT<=G+7,CONST(IF(T=0,H,REF(H,T))),DRAWNULL);
TA:=IF(CURRBARSCOUNT=T+1,T,DRAWNULL),CIRCLEDOT,COLORWHITE;
DRAWTEXT(ISLASTBAR,T,'天量能平台'),COLORWHITE;
W:=;
TW1:=CONST(HHVBARS(V,W));
TW0:=IF(CURRBARSCOUNT<=W+7,CONST(IF(TW1=0,C,REF(C,TW1))),DRAWNULL);
TW0A:=IF(CURRBARSCOUNT=TW1+1,TW0,DRAWNULL),CIRCLEDOT,COLORWHITE;
DRAWTEXT(ISLASTBAR,TW0,'量能平台'),COLORWHITE;
W:=;
TW:=CONST(HHVBARS(V,W));
TW:=IF(CURRBARSCOUNT<=W+7,CONST(IF(TW=0,C,REF(C,TW))),DRAWNULL);
TWA:=IF(CURRBARSCOUNT=TW+1,TW,DRAWNULL),COLORWHITE;
DRAWTEXT(ISLASTBAR,TW,'量能平台'),COLORWHITE;
MW:=;
MW1:=CONST(LLVBARS(V,MW));
MW0:=IF(CURRBARSCOUNT<=MW+7,CONST(IF(MW1=0,O,REF(O,MW1))),DRAWNULL);
MW0A:=IF(CURRBARSCOUNT=MW1+1,MW0,DRAWNULL),CIRCLEDOT,COLORWHITE;
DRAWTEXT(ISLASTBAR,MW0,'地量反弹量能平台'),COLORWHITE;
{ N1:=;N2:=;N3:=;}
EM1:=EMA(C,),NODRAW;
EM2:=EMA(C,),COLORRED;
EM3:=EMA(C,),COLORGREEN;
TJ8:=BETWEEN(EM2,EM1,EM3);
{ DRAWICON(TJ8=0,L,);}
B:='<-----------------财富平台';
DRAWTEXT(VOL=HHV(VOL,),C ,B),COLORRED;
{ 超跌反弹}
RSV:=(CLOSE-LLV(LOW,))/(HHV(HIGH,)-LLV(LOW,))*;
短期底部:=LLV(OPEN,);
K:=SMA(RSV,3,1);
D:=SMA(K,3,1);
J:=(3*K-2*D),LINETHICK2;
D2:=SMA(J,3,1)*0.;
setState是同步更新还是异步更新?
在React.8之前的版本中,我们更新数据需要用到setState,码论企稳源码那么你知道setState是码论同步还是异步的呢?它内部是如何实现的,你了解吗?今天我们就一起来学习一下关于setState的码论那些事吧!setState自从React.8添加了Hook后,我们编写React组件基本都是函数组件,很少用到class组件了。我们都知道在函数组件中通过useState这个Hook来修改组件的状态,而在.8之前的版本中,我们都是通过setState来修改组件的状态,因此我们还是很有必要了解一下关于setState相关的知识点。
在面试或者工作中,我们经常会遇到关于组件状态更新的问题,就拿setState来说,老巫婆源码在组件更新的时候,setState是同步更新还是异步更新的?当我们更新一个组件的状态后,我们如何才能立即获取到刚才更新的状态?这些就是我们需要学习和了解的地方。要了解setState是同步还是异步,就先需要了解一下React中的合成事件了。
如果了解过React事件相关方面的童鞋,那么就会知道React的事件都是合成事件,而不是js的原生事件。那什么是合成事件呢?简单来说就是React通过给document上挂载一个事件监听函数,通过事件冒泡的方式来完成事件的执行,当DOM元素触发后会冒泡到document,而React就会找到对应的苹果传源码组件生成一个合成事件出来,并按组件树模拟一遍事件冒泡,这就是React中的合成事件。
当然,上述的方法在React之后的版本中进行了修改。React中将事件挂载在了DOM的容器中,也就是挂载在ReactDOM执行的节点上,这样修改的好处是哪怕一个项目中有多个版本的React存在,组件的事件也不会乱套。那么哪些事件会被捕获生成合成事件呢?在React源码的事件快照中所包含的事件才会被捕获到,例如:click、blur、focus等等。收款php源码
了解完合成事件,我们该继续学习setState是同步还是异步的。一般来说setState是异步的,例如下面这个例子:
clsssTestextendsComponent{ state={ count:0};componentDidMount(){ this.setState({ count:1},()=>{ console.log(this.state.count);//1});console.log(this.state.count);//0}render(){ return(...)}}当我们在componentDidMount生命周期中通过setState修改组件的状态后,我们只有在setState的第二个参数中才能立即获取到当前修改的值,而在外部获取到的值还是未改变之前的值,由此可以证明setState是异步的。我们是否会觉得React中的setState执行像是一个队列,因为React会根据队列逐一执行,并且合并setState的操作,当state数据完成后执行回调,然后根据结果来更新虚拟DOM触发渲染。那么为什么React官方团队要按这样的执行思路来实现呢?为什么不能用同步执行的思路来实现呢?
在React出来后,官方给出的解释的是:为了保持内部的一致性,如果setState是同步的,但是props却不是,就会导致数据的错乱;第二点就是为了后续的升级启用并发更新。那么什么情况下setState是同步的呢?
如果我们将setState放在setTimeout或者setInterval中,那么它们的执行就会跟上面将的完全不同了,大致的代码如下:
clsssTestextendsComponent{ state={ count:0};componentDidMount(){ this.setState({ count:this.state.count+1});console.log(this.state.count);//0setTimeout(()=>{ this.setState({ count:this.state.count+1});console.log('setTimeout',this.state.count);//1},0);}render(){ return(...)}}当setState执行时,会将状态存入padding队列中,然后React会判断当前是否处于batchupdate阶段,如果是,则会将组件存入dirtyComponents中;反之则会遍历所有的dirtyComponents,并调用updateComponent用于更新pending、state或者props。
在React的生命周期事件和合成事件中可以获取到isBatchingUpdates的控制权,用于将状态放入队列中,并控制执行的节奏。而在setTimeout、addEventListener这些原生事件中,无法获取到isBatchingUpdates的控制权,就会导致isBatchingUpdates只会为false,且会一直执行,因此setState就会同步执行并修改组件的状态。
最后setState其实并不是真的异步,只是看起来像是异步执行的,它是通过isBatchingUpdates来判断当前执行是同步还是异步的,如果isBatchingUpdates为true,则按异步执行,反之就是同步执行。要改变isBatchingUpdates,只需要打破React的合成事件,在js的原生事件中执行setState即可,所以你知道setState是同步还是异步的吗?
怎样导入Java源程序?
1,直接拷贝覆盖,不管是完整的带项目配置文件的java源程序,还是不完整的或缺少配置文件的都可以。
具体步骤:
先在Eclipse中新建空的工程并且命好名,然后把旧工程的目录里所有代码文件目录,直接拷贝覆到新建空的工程工程目录下,然后在eclipse中右击刷新就可以了。
比如:新建工程名叫 xxx,需要复制的工程文件名叫 sss
在本地磁盘打开xxx所在的文件,打开xxx目录,然后把sss目录下的所有文件复制到xxx目录下就可以了。在eclipse中刷新,再导入需要的jar包就行了。
2,对于完整的带项目配置文件的java源码,按步骤操作即可:
File -> Import -> General
选择Existing Projects into Workspace,选择要导入的文件,点击“finish",OK。
3,对于不完整的工程(java程序源文件)或缺少工程配置文件的,
先新建空的工程并且命好名
然后File -> Import -> General
选择File System,点击“next”,From directory 选择要导入的路径,
注意into Folder要选择刚刚建好的工程路径,点击“finish",OK。