我有一个对象数组，其中for循环遍历。每个对象都是我测试的IP地址。但是，一旦for循环到达失败的特定对象，for循环大约需要15秒到一分钟才能移动到下一个对象。但是，如果我通过点击与设备上的显示交互，则for循环移动到下一个对象。我发现这很奇怪，因为我打电话给[[UIApplication sharedApplication] beginIgnoringInteractionEvents];。所以A）为什么应用程序仍然检测影响for循环的触摸事件。并且B）我确认[[UIApplication sharedApplication] beginIgnoringInteractionEvents];确实有效，因为如果我尝试点击barButtonItem没有任何反应。所以这是我的问题，暂时忽略的用户交互如何仍然导致for循环移动到下一个对象？我已经确认线程/ GCD没有问题。我知道如果没有代码示例，这可能很难理解，但是我想知道影响for循环的UI交互事件背后的原理。
更新<！/强>
代码：
-(void)beginConnectivitySetupAndTests {
for (int i = 0; i<[extractedDataArray count]; i++) {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
NSString *inStoreObject = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectType"];
NSString *objectTitle = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectTechnicalTitle"];
NSString *objectLastOctet = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectLastOctet"];
NSString *isInfrastructureObject = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectIsInfrastructureObject"];
NSString *needsAlternateSecondOctet = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectablityObjectNeedsAlternateSecondOctet"];
NSLog(@"Working with: %@",objectTitle);
if ([inStoreObject isEqualToString:@"InStoreObject"]) {
if ([needsAlternateSecondOctet isEqualToString:@"YES"]) {
// self.deviceIPAddress = nil;
NSLog(@"%@", self.deviceIPAddress);
NSMutableArray <NSString *> *octets = [self.deviceIPAddress componentsSeparatedByString:@"."];
NSString *firstOctetString = [octets objectAtIndex:0];
NSString *secondOctetString = [octets objectAtIndex:1];
NSString *thirdOctetString = [octets objectAtIndex:2];
int secondInt = secondOctetString.intValue;
if (secondInt >= 40 && secondInt <= 47) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +40];
}
else if (secondInt >= 52 && secondInt <= 53) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +100];
}
else if (secondInt >= 120 && secondInt <= 121) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +100];
}
else if (secondInt >= 122 && secondInt <= 123) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +40];
}
else if (secondInt >= 124 && secondInt <= 125) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +40];
}
else if (secondInt >= 126 && secondInt <= 127) {
[octets removeObjectAtIndex:1];
secondOctetString = [NSString stringWithFormat:@"%d", secondInt +40];
} else {
}
NSString *finalString = [NSString stringWithFormat:@"%@.%@.%@.%@", firstOctetString, secondOctetString, thirdOctetString, objectLastOctet];
[[extractedDataArray objectAtIndex:i] setValue:[NSString stringWithFormat:@"%@",finalString]forKey:@"ConnectabilityObjectFullIPAddress"];
finalIPAddress = finalString;
octets = nil;
} else {
NSMutableArray <NSString*> *octets = [self.deviceIPAddress componentsSeparatedByString:@"."];
NSString *firstOctetString = [octets objectAtIndex:0];
NSString *secondOctetString = [octets objectAtIndex:1];
NSString *thirdOctetString = [octets objectAtIndex:2];
[octets removeObjectAtIndex:3];
NSString *lastOctet = [NSString stringWithFormat:@"%@", objectLastOctet];
NSString *constructedIPAddress = [NSString stringWithFormat:@"%@.%@.%@.%@", firstOctetString, secondOctetString, thirdOctetString, lastOctet];
finalIPAddress = constructedIPAddress;
[[extractedDataArray objectAtIndex:i] setValue:[NSString stringWithFormat:@"%@",constructedIPAddress]forKey:@"ConnectabilityObjectFullIPAddress"];
NSLog(@"%@ IP: %@", objectTitle, constructedIPAddress);
}
} else {
finalIPAddress = [[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectFullIPAddress"];
}
self.ping = [[SimplePing alloc] initWithHostName:finalIPAddress];
NSLog(@"pinging: %@",finalIPAddress);
self.ping.delegate = self;
[self.ping start];
do {
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
} while (self.ping != nil);
if (pingableObjectAddress) {
if (_deviceLatencyString == NULL) {
[[extractedDataArray objectAtIndex:i] setValue:[NSString stringWithFormat:@"Successful"] forKey:@"ConnectivityPingTestResultValue"];
} else {
[[extractedDataArray objectAtIndex:i] setValue:[NSString stringWithFormat:@"Successful: latency: %@ ms",_deviceLatencyString] forKey:@"ConnectivityPingTestResultValue"];
}
pingableObjectAddress = nil;
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
portNumberValue = [[[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectPorts"] intValue];
CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)finalIPAddress, portNumberValue, &readStream, &writeStream);
inputStream = (NSInputStream*)CFBridgingRelease(readStream);
outputStream = (NSOutputStream*)CFBridgingRelease(writeStream);
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];
NSLog(@"Opening Port for %lu at IP Address %@", (unsigned long)portNumberValue, finalIPAddress);
NSString *response = @"Fly with me!";
NSData *data = [[NSData alloc] initWithData:[response dataUsingEncoding:NSASCIIStringEncoding]];
[outputStream write:[data bytes] maxLength:[data length]];
if ([[extractedDataArray objectAtIndex:i] valueForKey:@"ConnectabilityObjectPorts"] != nil ) {
if (_connectedPortNumber != 0) {
NSLog(@"Port Connection %lu succeeded for %@", (unsigned long)portNumberValue, finalIPAddress);
[[extractedDataArray objectAtIndex:i] setValue:@"Successful" forKey:@"ConnectivityPortConnectResultValue"];
if (!isInfrastructureObject) {
_portConnectionSucceeded = _portConnectionSucceeded + 1;
NSLog(@"port connect is not for infrastructure object");
}
self.connectedPortNumber = 0;
} else {
if (!isInfrastructureObject) {
_portConnectionFailed = _portConnectionFailed + 1;
}
}
}
} else {
if (!isInfrastructureObject) {
pingFailed = pingFailed + 1;
}
}
NSLog(@"%lu",(unsigned long)i);
}
}
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
}
// does have a valid IP address
-(void)simplePing:(SimplePing *)pinger didStartWithAddress:(NSData *)address {
[self.ping sendPingWithData:nil];
}
// device did send packet
-(void)simplePing:(SimplePing *)pinger didSendPacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber address:(nonnull NSString *)address {
// NSLog(@"Sending 64 bytes to %@: icmp_seq=%hu ttl=64", address, sequenceNumber);
pingTimeoutTimer = [NSTimer scheduledTimerWithTimeInterval:PING_TIMEOUT target:self selector:@selector(timerFired) userInfo:nil repeats:NO];
_dateRef = [NSDate date];
NSLog(@"Packet Sent to: %@", address);
}
// timeout timer, fires when a ping back is never recieved
-(void)timerFired {
NSLog(@"timeout timer fired");
[pingTimeoutTimer invalidate];
//self.pingableObjectAddress = nil;
self.pingTimeoutTimer = nil;
self.ping = nil;
}
// failed to send packet error handler
-(void)simplePing:(SimplePing *)pinger didFailToSendPacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber error:(NSError *)error {
[self.pingTimeoutTimer invalidate];
pingTimeoutTimer = nil;
self.ping = nil;
if (error) {
NSLog(@"Ping Error: %@", error);
}
}
// device did recieve unexpected ping packet, handle this when this happens
-(void)simplePing:(SimplePing *)pinger didReceiveUnexpectedPacket:(NSData *)packet {}
// did recieve response packet
-(void)simplePing:(SimplePing *)pinger didReceivePingResponsePacket:(NSData *)packet sequenceNumber:(uint16_t)sequenceNumber address:(NSString *)address {
[pingTimeoutTimer invalidate];
NSDate *end = [NSDate date];
double latency = [end timeIntervalSinceDate:_dateRef] *1000;
self.deviceLatencyString = [NSString stringWithFormat:@"%.f", latency];
self.pingTimeoutTimer = nil;
// NSLog(@"64 bytes sent to %@: icmp_seq=%hu ttl=64 time = %f ms", address, sequenceNumber, _latency);
self.pingableObjectAddress = address;
// NSLog(@"%@", pingableObjectAddress);
NSLog(@"did recieve packet from: %@", address);
self.ping = nil;
}
// device failed to ping for failed reason
-(void)simplePing:(SimplePing *)pinger didFailWithError:(NSError *)error {
NSLog(@"Failed With Error %@", error);
assert(pinger == self.ping);
[self.ping stop];
self.ping = nil;
}