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iOS - Usage of NSData

2024-07-10 20:21:10   217人阅读

Reference link : https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/BinaryData/Tasks/WorkingBinaryData.html

1. create NSData, here msgData is also a NSData:

    const Byte * data = http://www.mamicode.com/(const Byte *)[msgData bytes];    heartbeat.rawData = [NSData dataWithBytes: data length: [msgData length]];

2. Compare two NSData

            // if value not changed            if([model.rawData isEqualToData:(NSData*)msgData])            {                return FALSE;            }

 


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