我正在尝试从 NSInputStream 读取超过 300KB 的大图像文件。但我只得到了300KB。其他数据缺失。如果你知道的话，你能帮助我吗？我正在等待您的宝贵答复。我在下面提到了我的代码：从 NSStreamEventsHasBytesAvailable 调用这个 readAllData 方法：
- (void)readAllData {
if (_readData == nil) {
_readData = [[NSMutableData data] retain];
}
while ([[_session inputStream] hasBytesAvailable])
{
unsigned int bytesRead = 0;
bytesRead = [[_session inputStream] read:buf maxLength:EAD_INPUT_BUFFER_SIZE];
if (bytesRead) {
NSMutableString *_string = [NSMutableString stringWithString:@""];
for (int i = 0; i < _readData.length; i++) {
unsigned char _byte;
[_readData getBytes:&_byte range:NSMakeRange(i, 1)];
if (_byte >= 32 && _byte < 127) {
[_string appendFormat:@"%c", _byte];
} else {
[_string appendFormat:@"[%d]", _byte];
}
}
[_readData appendBytes:(const void *)buf length:bytesRead];
}
}
NSString *string=[NSString stringWithFormat:@"%d",_readData.length];
UIAlertView *sesView = [[UIAlertView alloc] initWithTitle:@"readDatalength"
message:string
delegate:self
cancelButtonTitle:nil otherButtonTitles:@"OK" , nil];
[sesView show];
}