Reputation: 3298
So I am taking this UIImage data and and converting to a string in base64. the problem is that it hangs on the UI thread whilst converting and I am not sure why.
- (void)processImage:(UIImage*)image{
dispatch_queue_t myQueue = dispatch_queue_create("My Queue",NULL);
[self.spinnerOutlet setAlpha:0.0f];
[self.spinnerOutlet startAnimating];
dispatch_async(myQueue, ^{
// Convert image
NSData *myData = [UIImagePNGRepresentation(image) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
NSString *myString = [NSString stringWithUTF8String:[myData bytes]];
dispatch_async(dispatch_get_main_queue(), ^{
// Update the UI
[self showSuccessAlertView:@"Success!" message:@"Submitting Image..."];
snapShotInBase64 = myString;
[self sendImagePostRequest];
});
});
}
Upvotes: 2
Views: 631
Reputation: 233
Try this code:
- (void)processImage:(UIImage*)image{
dispatch_queue_t myQueue = dispatch_queue_create("My Queue",NULL);
[self.spinnerOutlet setAlpha:0.0f];
[self.spinnerOutlet startAnimating];
dispatch_async(myQueue, ^{
// Convert image
NSData *myData = [UIImagePNGRepresentation(image) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
NSString *myString = [NSString stringWithUTF8String:[myData bytes]];
snapShotInBase64 = myString;
dispatch_async(dispatch_get_main_queue(), ^{
// Update the UI
[self showSuccessAlertView:@"Success!" message:@"Submitting Image..."];
});
});
dispatch_barrier_async(myQueue, ^{
[self sendImagePostRequest];
});
}
or
- (void)processImage:(UIImage*)image{
dispatch_queue_t myQueue = dispatch_queue_create("My Queue",NULL);
[self.spinnerOutlet setAlpha:0.0f];
[self.spinnerOutlet startAnimating];
dispatch_async(myQueue, ^{
// Convert image
NSData *myData = [UIImagePNGRepresentation(image) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
NSString *myString = [NSString stringWithUTF8String:[myData bytes]];
snapShotInBase64 = myString;
dispatch_async(dispatch_get_main_queue(), ^{
// Update the UI
[self showSuccessAlertView:@"Success!" message:@"Submitting Image..."];
dispatch_async(myQueue, ^{
[self sendImagePostRequest];
});
});
});
}
hope will help. If you upload image in server, why you don`t use AFNetworking library
Upvotes: 1