The keyboard will overwrite the text box when it pops up. How to solve _ios

In some Web landing interface, we often see, the keyboard appears and hidden operations, then based on how the code is implemented? The following small prepared a specific code introduction, hereby share to the cloud Habitat Community Platform for your reference

First to show you the effect of the picture:

The specific code looks like this:

#import "ViewController.h" #import "uiview+frameextension.h"//can write on its own, later with convenient #define Kdeviceheight [UIScreen mainscreen ].bounds.size.height @interface Viewcontroller () @end @implementation Viewcontroller-(void) viewdidload {[Super Viewdi
Dload];
Set the background color of the view Self.view.backgroundColor = [Uicolor Lightgraycolor];
Adding the first text box assumes position uitextfield *firstfield = [[Uitextfield alloc]initwithframe:cgrectmake (50, 300, 200, 40)];
Firstfield.backgroundcolor = [Uicolor Whitecolor];
[Self.view Addsubview:firstfield]; Add first text box Uitextfield *secondfield = [[Uitextfield alloc]initwithframe:cgrectmake (firstfield.x, FirstField.bottom +
Firstfield.width, Firstfield.height)];
[Self.view Addsubview:secondfield];
Secondfield.backgroundcolor = [Uicolor Whitecolor]; Registers the keyboard display notification [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (showkeyboard:) Name:
Uikeyboardwillshownotification Object:nil]; Register a keyboard hidden alert [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (HIDEkeyboard:) name:uikeyboardwillhidenotification Object:nil]; When the keyboard pops up, execute this method,-(void) Showkeyboard: (nsnotification *) notification{//Define a text box that points to the text box being edited, which is the text box that pops up the keyboard Uitextfield *
Txtfield; This time traversing all the views of the current view, the Subviews array holds all the child views for the current view for (UIView *subview in self.view.subviews) {//If the child view is a text box, The Iskindofclass method can determine whether a variable is a variable of a certain type if ([Subview Iskindofclass:[uitextfield class]]) {//First convert the child view to a text box Uitextfield *
Tempfield = (Uitextfield *) Subview;
To determine if this text box is editing if (tempfield.isediting) {//If this text box is being edited, that is the text box I am looking for, interrupt loop Txtfield = Tempfield; break;}
} NSLog (@ "%@", notification);
Gets the UserInfo property of the notification nsdictionary *userinfodict = Notification.userinfo;
Get the keyboard bounds nsvalue *value = [Userinfodict Objectforkey:uikeyboardboundsuserinfokey] by the UserInfo property of the keyboard notification;
The size of the keyboard cgsize keyboardsize = [value cgrectvalue].size;
Keyboard height CGFloat keyboardheight = keyboardsize.height;
CGFloat offset = Kdeviceheight-keyboardheight-txtfield.bottom; if (Offset < 0) {//You need to move offset = offset-10 in this case; Saves the height of the move up [UIView animatewithduration:0.5 animations:^{self.view.transform = cgaffinetransformmaketranslation (0,
Offset);
}];
}}-(void) Hidekeyboard: (nsnotification *) notification{[UIView animatewithduration:2 animations:^{
Self.view.transform = cgaffinetransformidentity;
}]; ///Click on the screen blank to hide the keyboard-(void) Touchesbegan: (Nsset<uitouch *> *) touches withevent: (uievent *) event{[Self.view
Endediting:yes]; } @end

About keyboard pop-up and hidden code for everyone to introduce here, I hope to help you!