iOS屏幕根据键盘自动变化高度

时间:2022-10-23 07:59:24

一、效果图

iOS屏幕根据键盘自动变化高度

二、代码

viewcontroller.h

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#import <uikit/uikit.h>
 
@interface viewcontroller : uiviewcontroller
<uitextfielddelegate>
 
@end

viewcontroller.m

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#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

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