Question

我正在开发一个iOS应用程序，它使用套接字连接与其他设备共享它的屏幕。它运行良好并且它正在发送屏幕截图，但是应用程序分配的内存不断增长和增长，直到几秒钟后它收到内存警告，然后它开始向接收服务器发送错误的数据，以便服务器崩溃。这是我现在使用的代码：

我的主ViewController.m中的方法：

-(void) activateShareScreen {
newClient *nc = [[newClient alloc] init];
[nc connectToServerUsingCFStream];
dispatch_queue_t backgroundQueue = dispatch_queue_create("No", 0);
dispatch_async(backgroundQueue, ^{
    while (true){
        @autoreleasepool {
        UIGraphicsBeginImageContext(mapView_.frame.size);
        [mapView_.layer renderInContext:UIGraphicsGetCurrentContext()];
        bitmap = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        }
        [nc writeToServer:UIImageJPEGRepresentation(bitmap, 50)];
    }
});
NSLog(@"Share screen button tapped");

}

它正在调用此文件：

#import "newClient.h"

@implementation newClient {

NSInputStream *iStream;
NSOutputStream *oStream;

CFReadStreamRef readStream;
CFWriteStreamRef writeStream;

BOOL boolean;


}

-(void) connectToServerUsingCFStream{

CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault,
                                   (CFStringRef) @"192.168.1.9",
                                   8080,
                                   &readStream,
                                   &writeStream);

if (readStream && writeStream) {
    //CFReadStreamSetProperty(readStream,
    //                        kCFStreamPropertyShouldCloseNativeSocket,
    //                        kCFBooleanTrue);
    //CFWriteStreamSetProperty(writeStream,
    //                        kCFStreamPropertyShouldCloseNativeSocket,
    //                        kCFBooleanTrue);
    iStream = (__bridge_transfer NSInputStream *)readStream;
    oStream = (__bridge_transfer NSOutputStream *)writeStream;
  //  [iStream setDelegate:self];
    //[iStream scheduleInRunLoop:[NSRunLoop currentRunLoop]
    //                   forMode:NSDefaultRunLoopMode];
    [iStream open];

   // [oStream setDelegate:self];
    //[oStream scheduleInRunLoop:[NSRunLoop currentRunLoop]
    //                   forMode:NSDefaultRunLoopMode];
    [oStream open];
   // data = UIImageJPEGRepresentation(bitmap, 50);
    boolean = YES;



(void) writeToServer:(NSData *) data{
        int len;
        uint32_t length = (uint32_t)htonl([data length]);
        //[oStream write:(const uint8_t *) "/n" maxLength:2];
        // Sending out the length of the screenshot image and then the image
        len=[oStream write:(const uint8_t *)&length maxLength:4];
        NSLog(@"len=%d",len);
        //[oStream write:(const uint8_t *) "/n" maxLength:2];
        len=[oStream write:(const uint8_t *)[data bytes] maxLength:[data length]];
        NSLog(@"len=%d",len);
        //[oStream write:(const uint8_t *)"/n" maxLength:0];
}


/*- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode
{
    switch(eventCode) {
        case NSStreamEventHasSpaceAvailable:
            if(stream == oStream) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    @autoreleasepool {

                    int len;
                    uint32_t length = (uint32_t)htonl([data length]);

                    // Sending out the length of the screenshot image and then the image
                    len=[oStream write:(const uint8_t *)&length maxLength:4];
                    NSLog(@"len=%d",len);
                    if (len<0) {
                        [oStream write:(const uint8_t *)[data bytes] maxLength:length];
                    }
                    [oStream write:(const uint8_t *)"/n" maxLength:0];
                }
            });

        }
}

我是唯一经历过这种问题的人吗？我使用错误的方法吗？有什么建议如何解决问题？

这是我在其中运行应用程序时的工具屏幕截图： Screenshot from instruments tool

Answer 1

@autoreleasepool {
    while (true){
       ...
    }
}

自动释放永远不会完成，它应该放在INS循环中

iOS应用分配越来越多的内存

1 个答案: