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iOS 7 -(void)setupAlertCtr:(NSString*)choseMenuType compatibility


iOS 7 -(void)setupAlertCtr:(NSString*)choseMenuType compatibility

By : Dev SSRS
Date : November 19 2020, 01:01 AM
may help you . Because UIAlertController is only support for iOS 8 and later, in iOS 7 we still have to use UIActionSheet or UIAlertView
so you have to put condition like below
code :
if (ios8)// change your condition which check ios8 or later.
{
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Title" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    UIAlertAction* cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel  handler:^(UIAlertAction * action)
                                    {
                                        [alert dismissViewControllerAnimated:YES completion:nil];
                                    }];

    UIAlertAction* alertAction1 = [UIAlertAction actionWithTitle:@"Your title" style:UIAlertActionStyleDefault  handler:^(UIAlertAction * action)
                                   {
                                      //do what you want
                                   }];

    [alert addAction:cancelAction];
    [alert addAction:alertAction1];

    [self presentViewController:alert animated:YES completion:nil];
}
else
{
    UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"Title" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Your Title",nil];
    [actionSheet showInView:self.view];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
    case 0:
          //do what you want.
        break;
    case 1:
        break;
    default:
        break;
    }
}


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Casting void* to NSString* without stringWithCString

Casting void* to NSString* without stringWithCString


By : Payeli Mukherjee
Date : March 29 2020, 07:55 AM
To fix this issue After scouring the Apple website I discovered the method:
code :
- (id)initWithBytes:(const void *)bytes length:(NSUInteger)length encoding:(NSStringEncoding)encoding
boost::function<void (int)> type compatibility, how's it done?

boost::function<void (int)> type compatibility, how's it done?


By : Ayushya Raj
Date : March 29 2020, 07:55 AM
should help you out The technique used is known as type erasure.
I'll demonstrate with a toy class, written in C++11. Many of the details will not be accurate, but the general technique is:
code :
struct nullary_impl {
  virtual void invoke() const = 0;
  virtual ~nullary_impl() {}
};
typedef std::shared_ptr<nullary_impl> nullary_pimpl;
struct nullary_func {
  nullary_pimpl pimpl;
  nullary_func() = default;
  nullary_func( nullary_func const& ) = default;
  template<typename F>
  nullary_func( F const& f );
  void operator()() const {
    pimpl->invoke();
  };
};
template<typename T>
struct nullary_impl_impl:nullary_impl {
  T t;
  virtual void invoke() const override {
    t();
  }
  nullary_impl_impl( T const& t_ ):t(t_) {}
};
template<typename F>
nullary_func::nullary_func( F const& f ):
  pimpl( std::make_shared( nullary_impl_impl<F>(f) )
{}
How do I convert NSString to const void

How do I convert NSString to const void


By : Pai Deng
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Try casting the result of one of the NSString's methods that return a C string:
code :
– cStringUsingEncoding:
– getCString:maxLength:encoding:
– UTF8String
Shifted value with NSString * and void*

Shifted value with NSString * and void*


By : cmky01
Date : March 29 2020, 07:55 AM
With these it helps You should not assume how NSString object store it internal representation. In your case, first byte probably occupied with string length or other NSString internal data. Use following code instead:
code :
NSString *password = [passwordTextField stringValue];
void *mypassword = (void *)[password UTF8String];
StorePasswordKeychain(mypassword, strlen(mypassword));
NSString to const void *

NSString to const void *


By : LiuTiger
Date : March 29 2020, 07:55 AM
I hope this helps you . Instead of CFBridgingRetain(testString), you should use testString.UTF8String
code :
NSString *testString = @"testString";
const void *testConstVoid = testString.UTF8String;
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