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
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