Iphone iOS-从服务器接收二进制数据只能在调试模式下工作
我有一个关于你的问题 但我认为首先我应该提供一些代码: 这是处理我创建的对象的函数Iphone iOS-从服务器接收二进制数据只能在调试模式下工作,iphone,ios,debugging,nsstream,Iphone,Ios,Debugging,Nsstream,我有一个关于你的问题 但我认为首先我应该提供一些代码: 这是处理我创建的对象的函数 - (void)handleObject:(NSMutableData *)object { NSLog(@"[object length] = %d", [object length]); Byte *byteArray; byteArray = (Byte *)[object bytes]; switch (byteArray[5]) { case 0: NSLog(@"Login OK");
- (void)handleObject:(NSMutableData *)object {
NSLog(@"[object length] = %d", [object length]);
Byte *byteArray;
byteArray = (Byte *)[object bytes];
switch (byteArray[5]) {
case 0: NSLog(@"Login OK");
break;
case 1: NSLog(@"Exit. Server disconnect");
break;
case 2: NSLog(@"Ping erhalten");
break;
case 4: NSLog(@"Points received");
break;
case 6: NSLog(@"transfer of POLYLINE vector objects");
break;
case 8: NSLog(@"transfer of POLYGON vector objects");
break;
case 9: NSLog(@"transfer of Render Rule");
break;
case 10: {
NSLog(@"end of response for RequestVectorObjects");
isLoading = FALSE;
}
break;
case 11: NSLog(@"Background Colorcode: %d", (byteArray[6] & 0xFF));
break;
default: NSLog(@"From server: default value");
break;
}
}
这里我从一个流中接收数据
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
switch(eventCode) {
case NSStreamEventHasBytesAvailable:
{
isLoading = YES;
while (isLoading) {
uint8_t bufSize[4];
int packetLength = 0;
[(NSInputStream *)stream read:bufSize maxLength:4];
packetLength = [self bytesToInt:bufSize withOffset:0];
NSLog(@"packetLength: %d", packetLength);
[tempStore appendBytes:bufSize length:4];
if (packetLength == 25600) {
loggedIn = YES;
uint8_t buf[4];
[(NSInputStream *)stream read:buf maxLength:4];
[tempStore appendBytes:buf length:4];
[self handleObject:tempStore];
}
else {
uint8_t buf[packetLength];
[(NSInputStream *)stream read:buf maxLength:packetLength];
[tempStore appendBytes:buf length:packetLength];
[self handleObject:tempStore];
}
[tempStore resetBytesInRange:NSMakeRange(0, [tempStore length])];
[tempStore setLength:0];
}
NSLog(@"Finished loading objects");
} break;
}
如果在模拟器上或者在iPhone上调试应用程序,一切都很好,但是如果尝试在设备上运行它,我总是会出现错误,因为packetLength的值是错误的,所以我尝试在缓冲区中读取太多字节
现在我的问题是:怎么可能所有的值在调试模式下都是正确的,但在运行模式下却完全搞砸了?有什么我可以避免的问题,或者我应该知道
非常感谢你的帮助
这是我的ByTestPoint函数,但我认为如果接收到的值正确,它会正常工作
- (int)bytesToInt:(Byte *)b withOffset:(int)offset {
int ret = 0;
for (int i = 0; i < 4; i++) {
ret |= (b[offset + i] & 0xFF) << (3-i)*8;
}
return ret;
-(int)bytestpoint:(字节*)b带偏移量:(int)偏移量{
int-ret=0;
对于(int i=0;i<4;i++){
ret |=(b[offset+i]&0xFF)检查[NSInputStream read]的返回值
。指定maxLength并不意味着实际上要读取很多字节。它可以更少,甚至可以是0。如果流只读取2个字节,我想您将不得不发出第二次读取,指针指向已在缓冲区中读取的字节之后,以及缓冲区中剩余字节的maxLength。请检查是否重新读取将[NSInputStream read]的值
。指定maxLength并不意味着实际上要读取很多字节。它可以更少,甚至可以是0。如果流只读取2个字节,我想您将不得不使用指针进行第二次读取,该指针指向已在缓冲区中读取的字节的后面,并使用缓冲区中剩余字节的maxLength。通过循环接收到的数据直到我达到我的maxLength值来修复它。这并不难修复,但我表现得不太聪明
我是这样做的:
isLoading = YES;
while (isLoading) {
uint8_t bufSize[4];
int packetLength , maxLength, len;
maxLength = 4;
len = [(NSInputStream *)stream read:bufSize maxLength:maxLength];
NSLog(@"len = %d", len);
packetLength = [self bytesToInt:bufSize withOffset:0];
NSLog(@"packetLength: %d", packetLength);
[tempStore appendBytes:bufSize length:maxLength];
if (packetLength == 25600) {
loggedIn = YES;
maxLength = 4;
uint8_t buf[maxLength];
len = [(NSInputStream *)stream read:buf maxLength:maxLength];
NSLog(@"len = %d", len);
[tempStore appendBytes:buf length:maxLength];
}
else {
maxLength = packetLength;
BOOL allDataReceived = NO;
while (!allDataReceived) {
uint8_t buf[maxLength];
len = [(NSInputStream *)stream read:buf maxLength:maxLength];
NSLog(@"len = %d", len);
if (len < maxLength) {
maxLength -= len;
[tempStore appendBytes:buf length:len];
}
else {
allDataReceived = YES;
[tempStore appendBytes:buf length:len];
}
}
}
[self handleObject:tempStore];
[tempStore resetBytesInRange:NSMakeRange(0, [tempStore length])];
[tempStore setLength:0];
}
isLoading=YES;
当(孤岛加载){
uint8_t bufSize[4];
int packetLength,maxLength,len;
最大长度=4;
len=[(NSInputStream*)流读取:bufSize maxLength:maxLength];
NSLog(@“len=%d”,len);
packetLength=[self-bytestpoint:bufsizewithoffset:0];
NSLog(@“packetLength:%d”,packetLength);
[tempStore appendBytes:bufSize length:maxLength];
如果(包装长度=25600){
loggedIn=是;
最大长度=4;
uint8_t buf[最大长度];
len=[(NSInputStream*)流读取:buf maxLength:maxLength];
NSLog(@“len=%d”,len);
[tempStore appendBytes:buf长度:maxLength];
}
否则{
maxLength=包装长度;
BOOL allDataReceived=否;
而(!allDataReceived){
uint8_t buf[最大长度];
len=[(NSInputStream*)流读取:buf maxLength:maxLength];
NSLog(@“len=%d”,len);
if(长度<最大长度){
maxLength-=len;
[tempStore appendBytes:buf长度:len];
}
否则{
allDataReceived=是;
[tempStore appendBytes:buf长度:len];
}
}
}
[自处理对象:tempStore];
[tempStore resetBytesInRange:NSMakeRange(0,[tempStore长度]);
[临时存储设置长度:0];
}
我最终通过循环接收到的数据,直到达到我的maxLength值。这不太难修复,但我表现得不太聪明
我是这样做的:
isLoading = YES;
while (isLoading) {
uint8_t bufSize[4];
int packetLength , maxLength, len;
maxLength = 4;
len = [(NSInputStream *)stream read:bufSize maxLength:maxLength];
NSLog(@"len = %d", len);
packetLength = [self bytesToInt:bufSize withOffset:0];
NSLog(@"packetLength: %d", packetLength);
[tempStore appendBytes:bufSize length:maxLength];
if (packetLength == 25600) {
loggedIn = YES;
maxLength = 4;
uint8_t buf[maxLength];
len = [(NSInputStream *)stream read:buf maxLength:maxLength];
NSLog(@"len = %d", len);
[tempStore appendBytes:buf length:maxLength];
}
else {
maxLength = packetLength;
BOOL allDataReceived = NO;
while (!allDataReceived) {
uint8_t buf[maxLength];
len = [(NSInputStream *)stream read:buf maxLength:maxLength];
NSLog(@"len = %d", len);
if (len < maxLength) {
maxLength -= len;
[tempStore appendBytes:buf length:len];
}
else {
allDataReceived = YES;
[tempStore appendBytes:buf length:len];
}
}
}
[self handleObject:tempStore];
[tempStore resetBytesInRange:NSMakeRange(0, [tempStore length])];
[tempStore setLength:0];
}
isLoading=YES;
当(孤岛加载){
uint8_t bufSize[4];
int packetLength,maxLength,len;
最大长度=4;
len=[(NSInputStream*)流读取:bufSize maxLength:maxLength];
NSLog(@“len=%d”,len);
packetLength=[self-bytestpoint:bufsizewithoffset:0];
NSLog(@“packetLength:%d”,packetLength);
[tempStore appendBytes:bufSize length:maxLength];
如果(包装长度=25600){
loggedIn=是;
最大长度=4;
uint8_t buf[最大长度];
len=[(NSInputStream*)流读取:buf maxLength:maxLength];
NSLog(@“len=%d”,len);
[tempStore appendBytes:buf长度:maxLength];
}
否则{
maxLength=包装长度;
BOOL allDataReceived=否;
而(!allDataReceived){
uint8_t buf[最大长度];
len=[(NSInputStream*)流读取:buf maxLength:maxLength];
NSLog(@“len=%d”,len);
if(长度<最大长度){
maxLength-=len;
[tempStore appendBytes:buf长度:len];
}
否则{
allDataReceived=是;
[tempStore appendBytes:buf长度:len];
}
}
}
[自处理对象:tempStore];
[tempStore resetBytesInRange:NSMakeRange(0,[tempStore长度]);
[临时存储设置长度:0];
}
感谢您的回复。在返回值[NSInputStrea]之前,是否可以在while循环中读取数据