ios利用单例传值

创建单例.h文件

#import <Foundation/Foundation.h>

@interface Animal : NSObject

+ (instancetype)shareTimeH;

@property (nonatomic,weak)NSString *name;

@end

创建单例.m文件

#import "Animal.h"

@implementation Animal

+ (instancetype)shareTimeH{

    staticAnimal *anima;

    staticdispatch_once_t onceToken;

    dispatch_once(&onceToken,^{

        

        anima = [[[selfclass]alloc]init];;

        

    });

    return anima;

}

@end

第一个界面.m文件

#import "ViewController.h"

#import "Animal.h"

#import "SeconderViewController.h"

@interface ViewController ()

{

    

    UITextField *_textfield;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    

    _textfield = [UITextField new];

    _textfield.backgroundColor = [UIColor redColor];

    _textfield.frame = CGRectMake(30,30, 200,49);

    [self.view addSubview:_textfield];   

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    

    Animal *animal = [AnimalshareTimeH];

    animal.name = _textfield.text;

    SeconderViewController *secondVC = [SeconderViewControllernew];

    

    [selfpresentViewController:secondVCanimated:YEScompletion:^{

    }];

}

- (void)didReceiveMemoryWarning {

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

第二个界面.m文件

#import "SeconderViewController.h"

#import "Animal.h"

#import "ViewController.h"

@interface SeconderViewController ()

{

    UITextField *_Ktextfiled;

}

@end

@implementation SeconderViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    

    Animal *anima = [Animal shareTimeH];

    _Ktextfiled = [UITextFieldnew];

    _Ktextfiled.backgroundColor = [UIColor greenColor];

    _Ktextfiled.frame =CGRectMake(30,30, 200,50);

    self.view.backgroundColor = [UIColor whiteColor];

    _Ktextfiled.text = anima.name;

    [self.viewaddSubview:_Ktextfiled];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    

    [self dismissViewControllerAnimated:YES completion:^{

    }];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}