The process of block passing values in the UI

Upload the value from TextField in the second file to the lable of the first file

First step: rename typedef void (^passvalueblock) (NSString *);?

@Property Senondviewcontroller:uiviewcontroller

@Property (Nonatomic,strong) Passvalueblock Passvalueblock;

[Email protected]

@interface Senondviewcontroller ()

@Property (Nonatomic,strong) Uitextfield *textfield;

@end

Step Two: Block

-(void) Touchesbegan: (Nsset *) touches withevent: (uievent *) event{

Self.passvalueblock (Self.textfield.text);(This is the point)

[Self dismissviewcontrolleranimated:yes completion:nil];

}?

? The third step receives the value passed in the. m of the first file.

#import "RootViewController.h"

#import "CustomViewController.h"

@interfaceRootViewController ()

@property (Nonatomic,strong) UILabel *label;

@end

-(void) Touchesbegan: (Nsset *) touches withevent: (Uievent *) event

{

Senondviewcontroller? *senondvc=[senondviewcontroller new];

Expand Block

Senondvc?. passvalueblock=^ (NSString *text) {

Self.lable.text=text;

}?;

[SELFSHOWDETAILVIEWCONTROLLER:SENONDVC Sender:nil];

}?

It's just a way of passing values.

Besides, there are some methods, such as attribute transfer value, proxy value, proxy value, etc.

The process of block passing values in the UI