iOS ARC 内存一直不停的增加

Answer 1

Do not use the subdataWithRange method of NSData in the NSThread thread

Reposted, you can take a look

Answer 2

I didn’t give you the complete code, and I didn’t see what operations were done on the data. In addition, calling sleepForTimeInterval on the main thread will block the UI thread.

Answer 3

Are you sure about the memory growth caused by these codes? If you are sure, you can add a breakpoint at the entrance of this function, and then debug step by step to see how much memory increases after finishing which line of code

Answer 4

If there are many loops, you can manually add a release pool:

  @autoreleasepool {
      your code    
   }

For example, change your code to:

- (void)viewDidLoad {
    [super viewDidLoad];

    staitc int EVERBUFFERLEN = 2000;
    NSData *data = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"wakeup.pcm" ofType:nil]];
    NSMutableData *mData = [NSMutableData dataWithData:data];

    int readLength = 0;
    while (readLength < mData.length) {
        if (mData.length - readLength > EVERBUFFERLEN) {
            @autoreleasepool {
              NSData *data = [mData subdataWithRange:NSMakeRange(readLength, EVERBUFFERLEN)];
              readLength += EVERBUFFERLEN;
              [NSThread sleepForTimeInterval:0.01];
              data = nil;
           } 
        }
    }

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