iOS block进行页面之间传值
#import <UIKit/UIKit.h>
@interface FirstViewController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *contentTxtField;
@end
#import "SecondViewController.h"
#import "FirstViewController.h"
@interface FirstViewController ()
@end
@implementation FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)jumpToSecondBtnClick:(UIButton *)sender
{
UIStoryboard *firstSb=[UIStoryboard storyboardWithName:@"Main" bundle:nil];
SecondViewController *secondCtl=[firstSb instantiateViewControllerWithIdentifier:@"second"];
[secondCtl compeleteBlock:^(NSString *string) {
_contentTxtField.text=string;
}];
[self.navigationController pushViewController:secondCtl animated:YES];
}
@end
#import <UIKit/UIKit.h>
typedef void (^BlockPassValue) (NSString *string);
@interface SecondViewController : UIViewController
{
BlockPassValue myBlockValue;
}
@property (weak, nonatomic) IBOutlet UITextField *valueTxtField;
-(void)compeleteBlock:(BlockPassValue)myblock;
@end
#import "SecondViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)compeleteBlock:(BlockPassValue)myblock
{
myBlockValue=myblock;
}
- (IBAction)backToFirstBtnClick:(UIButton *)sender
{
if (myBlockValue)
{
myBlockValue(_valueTxtField.text);
}
[self.navigationController popViewControllerAnimated:YES];
}
@end
