这次主要总结一下界面间的反向传值的主要方法.
1.协议传值
第二个控制器设置协议相关信息
第一个控制器实现协议方法
//第二个控制器
#import <UIKit/UIKit.h>
@protocol JHDelegateViewControllerDelegate <NSObject>
@optional
- (void)delegateViewControllerDidClickwithString:(NSString *)string color:(UIColor *)color;
@end
@interface JHDelegateViewController : UIViewController
@property (nonatomic, assign) id<JHDelegateViewControllerDelegate> delegate;
@end
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if ([self.delegate respondsToSelector:@selector(delegateViewControllerDidClickwithString:color:)]) {
[self.delegate delegateViewControllerDidClickwithString:self.field.text color:[UIColor greenColor]];
}
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器
@interface JHRootViewController ()<JHDelegateViewControllerDelegate>
@property (weak, nonatomic) IBOutlet UIButton *delegateBtn;
@end
- (IBAction)pressDelegateVc:(id)sender {
JHDelegateViewController * vc = [[JHDelegateViewController alloc]init];
vc.delegate = self;
[self.navigationController pushViewController:vc animated:YES];
}
- (void)delegateViewControllerDidClickwithString:(NSString *)string color:(UIColor *)color
{
[self.delegateBtn setTitle:string forState:UIControlStateNormal];
[self.delegateBtn setBackgroundColor:color];
}
2.属性反向传值(注意与属性正向传值不同)
//属性传值从后往前传(不推荐)
//SecondViewController - > 取到textField,text
// pop(获取FirstVC)
//viewController - >设置titleTextField - >去使用
//第一个控制器
#import <UIKit/UIKit.h>
#import "BaseViewController.h"
@interface ViewController : BaseViewController
@property (nonatomic,strong)UILabel *titleLable;
@end
//第二个控制器
#import "SecondViewController.h"
#import "ViewController.h"
@interface SecondViewController ()
@property (nonatomic,strong)UITextField *textField;
@end
@implementation SecondViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self createSubView];
}
- (void)createSubView{
self.textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 200, 200, 49)];
_textField.backgroundColor = [UIColor yellowColor];
[self.view addSubview:_textField];
_textField.text = self.titleString;
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.backgroundColor = [UIColor redColor];
button.frame = CGRectMake(100, 400, 100, 100);
[button addTarget:self action:@selector(handleButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)handleButton:(UIButton *)button{
//属性往回传值
NSInteger count = self.navigationController.viewControllers.count;
ViewController *first = self.navigationController.viewControllers[count - 2];
first.titleLable.text = _textField.text;
[self.navigationController popToRootViewControllerAnimated:YES];
}
------以下为我收集整理的传值方法
3.APPDelegate
在AppDelegate中定义相关的属性变量
第二个控制器中为AppDelegate中的属性赋值
第一个控制器中在使用的地方取出AppDelegate中的值赋值
//UIApplicationDelegate
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
//AppDelegate属性
@property (nonatomic, copy) NSString * string;
@property (nonatomic, strong) UIColor * color;
@end
//第二个控制器
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
//设置数据信息
AppDelegate * app = [UIApplication sharedApplication].delegate;
app.string = self.field.text;
app.color = [UIColor orangeColor];
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器---设置
AppDelegate * app = [UIApplication sharedApplication].delegate;
if (app.string) {
[self.appBtn setTitle:app.string forState:UIControlStateNormal];
[self.appBtn setBackgroundColor:app.color];
}
4.控制器传值
第一个控制器.h里面设置相关属性等信息
第二个控制器设置第一个控制器参数,并在对应位置设置相关信息
//第一个控制器
#import <UIKit/UIKit.h>
@interface JHRootViewController : UIViewController
@property (weak, nonatomic) IBOutlet UIButton *vcBtn;
@end
//第二个控制器
#import <UIKit/UIKit.h>
@class ZZYRootViewController;
@interface ZZYVCViewController : UIViewController
@property (nonatomic, strong) ZZYRootViewController * rootVc;
@end
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self.rootVc.vcBtn setTitle:self.field.text forState:UIControlStateNormal];
[self.rootVc.vcBtn setBackgroundColor:[UIColor orangeColor]];
[self.navigationController popViewControllerAnimated:YES];
}
5.通知传值
第二个控制器发送通知
第一个控制器接收通知，设置数据
//第二个控制器
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[[NSNotificationCenter defaultCenter]postNotificationName:@"ZZYNotiSendValue" object:nil userInfo:@{@"value":self.field.text,@"color":[UIColor redColor]}];
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(setNoti:) name:@"ZZYNotiSendValue" object:nil];
- (void)setNoti:(NSNotification *)noti
{
[self.notiBtn setTitle:noti.userInfo[@"value"] forState:UIControlStateNormal];
[self.notiBtn setBackgroundColor:noti.userInfo[@"color"]];
}
5.Block传值
第二个控制器设置block相关信息
第一个控制器调用block，设置数据
方式1
//第二个控制器
@interface JHBlockViewController : UIViewController
@property (nonatomic, copy) void(^JHMyBlock) (NSString * string , UIColor * color);
@end
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.JHMyBlock) {
self.JHMyBlock(self.field.text,[UIColor lightGrayColor]);
}
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器
JHBlockViewController * vc = [[JHBlockViewController alloc]init];
[vc setJHMyBlock:^(NSString * string, UIColor * color) {
[self.blockBtn setTitle:string forState:UIControlStateNormal];
[self.blockBtn setBackgroundColor:color];
}];
方式2
//第二个控制器
typedef void(^JHMySecBlock) (NSString * string , UIColor * color);
@interface JHBlockViewController : UIViewController
@property (nonatomic, copy) JHMySecBlock mySecondBlock;
- (void)returnTextBlock:(JHMySecBlock)block;
@end
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.mySecondBlock) {
self.mySecondBlock(self.field.text,[UIColor lightGrayColor]);
}
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器
JHBlockViewController * vc = [[JHBlockViewController alloc]init];
[vc returnTextBlock:^(NSString *string, UIColor *color) {
[self.blockBtn setTitle:string forState:UIControlStateNormal];
[self.blockBtn setBackgroundColor:color];
}];
方式3
//第二个控制器
#import <UIKit/UIKit.h>
typedef void(^JHMyThrBlock) (NSString * string , UIColor * color);
@interface JHBlockViewController : UIViewController
@property (nonatomic, copy) JHMyThrBlock myThrBlock;
@end
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.myThrBlock) {
self.myThrBlock(self.field.text,[UIColor lightGrayColor]);
}
[self.navigationController popViewControllerAnimated:YES];
}
//第一个控制器
JHBlockViewController * vc = [[JHBlockViewController alloc]init];
vc.myThrBlock = ^(NSString * string, UIColor * color){
[self.blockBtn setTitle:string forState:UIControlStateNormal];
[self.blockBtn setBackgroundColor:color];
};
[self.navigationController pushViewController:vc animated:YES];
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