iOS Pass value--proxy value, block pass value, Nsnotificationcenter pass value

One: The use of proxy transmission value, is the use of agents to communicate.

Interface file:

#import <Foundation/Foundation.h>

@protocol cdelegate <NSObject>

-(void) Change: (NSString *) name;

@end

. h file

@interface viewcontroller:uiviewcontroller<cdelegate>

. m file

-(Ibaction) PUSHBB: (ID) Sender {

Bviewcontroller *bc=[[bviewcontroller alloc]initwithnibname:@ "Bviewcontroller" Bundle:[nsbundle MainBundle];

bc.delegate=self;

[Self PRESENTVIEWCONTROLLER:BC animated:yes completion:nil];

}

Bviewcontroller file

. h file

#import "ViewController.h"

#import "Cdelegate.h"

@interface Bviewcontroller:viewcontroller

@property (Weak, nonatomic) Iboutlet Uitextfield *name;

@property (nonatomic,assign) id<cdelegate> delegate;

@property (nonatomic,copy) Ablock block;

-(Ibaction) POPBB: (ID) sender;

@end

. m file

-(Ibaction) POPBB: (ID) Sender {

[Self.delegate Change:self.name.text];

[Self dismissviewcontrolleranimated:yes completion:nil];

}

II: Block Pass Value

typedef void (^ablock) (NSString *str);

@property (nonatomic,copy) Ablock block;

-(Ibaction) POPBB: (ID) Sender {

[Self.delegate Change:self.name.text];

Self.block (Self.name.text);

[Self dismissviewcontrolleranimated:yes completion:nil];

}

-(Ibaction) PUSHBB: (ID) Sender {

Bviewcontroller *bc=[[bviewcontroller alloc]initwithnibname:@ "Bviewcontroller" Bundle:[nsbundle MainBundle];

bc.block=^ (NSString *str) {

SELF.ANAME.TEXT=STR;

};

[Self PRESENTVIEWCONTROLLER:BC animated:yes completion:nil];

}

Three: Notice

Nsdictionary *dic=[nsdictionary dictionaryWithObject:self.name.text forkey:@ "name"];

[[Nsnotificationcenter defaultcenter]postnotificationname:@ "Changetext" object:self userInfo:dic];

-(void) Viewdidload {

[Super Viewdidload];

Additional setup after loading the view, typically from a nib.

[[Nsnotificationcenter defaultcenter]addobserver:self selector: @selector (changetext:) name:@ "Changetext" object: NIL];

}

iOS Pass value--proxy value, block pass value, Nsnotificationcenter pass value