[iOS] Objective-c sharedApplication delegate, global @property

AppDelegate.h

#define appDelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])

@property (nonatomic, assign)NSInteger globalCount;

How to use?

yourViewController1.h

#import "AppDelegate.h"

yourViewController1.m

- (void)functionSet {

       appDelegate. globalCount = 123;

}

ViewController2.h

#import "AppDelegate.h"

ViewController2.m

- (void)functionRead {

    NSLog(@"globalCount: %d", appDelegate. globalCount);

   // $ globalCount: 123

}