iOS屏幕根据键盘自动变化高度

一、效果图

二、代码

viewcontroller.h

#import <uikit/uikit.h>

@interface viewcontroller : uiviewcontroller
<uitextfielddelegate>

@end

viewcontroller.m

#import "viewcontroller.h"

#define w [uiscreen mainscreen].bounds.size.width
#define h [uiscreen mainscreen].bounds.size.height

@interface viewcontroller ()

@end

@implementation viewcontroller

- (void)viewdidload {
  [super viewdidload];
  // do any additional setup after loading the view, typically from a nib.
  
  
  uitextfield *field=[[uitextfield alloc]initwithframe:cgrectmake(100, 300, 50, 50)];
  field.backgroundcolor=[uicolor redcolor];
  field.delegate=self;
  [self.view addsubview:field];
}

#pragma -mark -uitextfielddelegate
-(bool)textfieldshouldreturn:(uitextfield *)textfield
{
  [textfield resignfirstresponder];
  
  //self.view 恢复原位
  nstimeinterval animationduration=0.10f;
  [uiview beginanimations:@"resizeforkeyboard" context:nil];
  [uiview setanimationduration:animationduration];
  float width = w;
  float height = h;
  float y = 0.0f;
  cgrect rect=cgrectmake(0.0f,y,width,height);
  self.view.frame=rect;
  [uiview commitanimations];

  
  return yes;
}

-(bool)textfieldshouldbeginediting:(uitextfield *)textfield
{
  nstimeinterval animationduration=0.30f;
  [uiview beginanimations:@"resizeforkeyboard" context:nil];
  [uiview setanimationduration:animationduration];
  float width = w;
  float height = h;
  //上移100个单位，按实际情况设置
  cgrect rect=cgrectmake(0.0f,-100,width,height);
  self.view.frame=rect;
  [uiview commitanimations];
  
  return yes;
}


- (void)didreceivememorywarning {
  [super didreceivememorywarning];
  // dispose of any resources that can be recreated.
}

@end

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。