-----------ViewController.m中的内容------------
#import "ViewController.h"
#import "ScreenView.h"
@interface ViewController ()<UITextFieldDelegate>
{
ScreenView *_screenV;//覆盖全屏
UIView *secView;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self textFieldOnView:self.view];//添加子视图
[self coverBtnOnView:self.view];//添加按钮
}
- (void)textFieldOnView:(UIView *)currentV{
UITextField *tF1 = [[UITextField alloc]init];
tF1.frame = CGRectMake(30, 100, 100, 40);
tF1.delegate = self;
#pragma ------设置tF1.tag = 1;
tF1.tag = 1;
tF1.borderStyle = UITextBorderStyleRoundedRect;
[currentV addSubview: tF1];
UITextField *tF2 = [[UITextField alloc]init];
tF2.frame = CGRectMake(30, 500, 100, 40);
tF2.delegate = self;
tF2.borderStyle = UITextBorderStyleRoundedRect;
[currentV addSubview: tF2];
secView = [[UIView alloc]initWithFrame:CGRectMake(150, 200, 200, 300)];
secView.backgroundColor = [UIColor yellowColor];
[currentV addSubview:secView];
UITextField *textF1 = [[UITextField alloc]init];
textF1.frame = CGRectMake(30, 100, 100, 40);
textF1.delegate = self;
textF1.borderStyle = UITextBorderStyleRoundedRect;
[secView addSubview: textF1];
UITextField *textF2 = [[UITextField alloc]init];
textF2.frame = CGRectMake(30, 250, 100, 40);
textF2.delegate = self;
textF2.borderStyle = UITextBorderStyleRoundedRect;
[secView addSubview: textF2];
}
- (void)coverBtnOnView:(UIView *)currentV{
UIButton *coverBtn = [UIButton buttonWithType:UIButtonTypeSystem];
coverBtn.backgroundColor = [UIColor cyanColor];
if (!_screenV) {
[coverBtn setTitle:@"覆盖全屏" forState:UIControlStateNormal];
[coverBtn addTarget:self action:@selector(coverScreen) forControlEvents:UIControlEventTouchUpInside];
}else{
[coverBtn setTitle:@"返回" forState:UIControlStateNormal];
[coverBtn addTarget:self action:@selector(removeCoverScreen) forControlEvents:UIControlEventTouchUpInside];
}
UIView *v = [self.view viewWithTag:1];
coverBtn.frame = v.frame;
CGRect temp = coverBtn.frame;
temp.origin.x += temp.size.width;
coverBtn.frame = temp;
[currentV addSubview:coverBtn];
}
- (void)removeCoverScreen{
[_screenV removeFromSuperview];
}
- (void)coverScreen{
_screenV = [[ScreenView alloc]initWithFrame:[UIScreen mainScreen].bounds];
#pragma -----视图本身透明度
_screenV.backgroundColor = [[UIColor brownColor]colorWithAlphaComponent:0.5];
#pragma -----视图及其子视图透明度
// screenV.alpha = 0.7;
#pragma -----创建view覆盖全屏，需要新建如ScreenView类，重写touchesBegan方法
[[UIApplication sharedApplication].keyWindow addSubview:_screenV];
#pragma -----如果self.view是全屏大小，下句可行，_screenV直接用UIView初始化，并能响应触摸事件
// [self.view addSubview:_screenV];
[self textFieldOnView:_screenV];//添加textField
[self coverBtnOnView:_screenV];
}
//开始编辑输入框的时候，软键盘出现，执行此事件
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
UIView *tempView = self.view;
if (_screenV) {
tempView = _screenV;
}
UIWindow *window = [[[UIApplication sharedApplication] delegate]window];
CGRect rect = [textField convertRect:textField.bounds toView:window];//将textField相对于其父视图的坐标转换成相对于window的坐标
NSInteger y = rect.origin.y + textField.frame.size.height;
NSInteger offset = (y - (tempView.frame.size.height - 256.0));//键盘高度216 //如何获取键盘高度？
NSTimeInterval animationDuration = 0.30f;
[UIView beginAnimations:@"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
//将视图的Y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示
if(offset > 0)
tempView.frame = CGRectMake(0.0f, -offset, tempView.frame.size.width, tempView.frame.size.height);
[UIView commitAnimations];
}
////当用户按下return键或者按回车键，keyboard消失
//-(BOOL)textFieldShouldReturn:(UITextField *)textField
//{
// [textField resignFirstResponder];
// return YES;
//}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[super touchesBegan:touches withEvent:event];
[self.view endEditing:YES];
}
//输入框编辑完成以后，将视图恢复到原始状态
-(void)textFieldDidEndEditing:(UITextField *)textField
{
UIView *tempView = self.view;
if (_screenV) {
tempView = _screenV;
}
tempView.frame =CGRectMake(0, 0, tempView.frame.size.width, tempView.frame.size.height);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-----------------ScreenView.m中的内容-----------------
#import "ScreenView.h"
@implementation ScreenView
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[super touchesBegan:touches withEvent:event];
[self endEditing:YES];
}
@end
有疏漏之处敬请指正。
END