iOS 点击屏幕空白区隐藏键盘方法
iOS开发中,经常要用到输入框,可默认情况下,输入框出来之后,除非点击键盘上面的“Done”或“Next”按钮才能将其隐藏。站在用户体验的角度上看,这种情况很不友好,尤其是不能突显苹果操作的便捷性。
总结出了两种方法:
第一种,是最常见的,就是给最外层的view添加一个手势响应UITapGestureRecognizer,代码如下:
- ( void )viewDidLoad { [ super viewDidLoad]; UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector (viewTapped:)]; tapGr.cancelsTouchesInView = NO ; [ self .view addGestureRecognizer:tapGr]; } -( void )viewTapped:(UITapGestureRecognizer*)tapGr { [activitySearchBar resignFirstResponder]; } |
第二种,稍微复杂些,不过思路也差不多,就是将最外层的view作为一个UIScrollView,点击即可将当前的焦点交给UIScrollView,代码如下:
#import <UIKit/UIKit.h> #import "BaseData.h" @interface BaseTextFieldView : UIScrollView { id target; int ypos,y; } -( void )setTarget:( id )d; @end |
#import "BaseTextFieldView.h" @implementation BaseTextFieldView - ( id )initWithFrame:(CGRect)frame { self = [ super initWithFrame:frame]; if ( self ) { // Initialization code. } return self ; } - ( BOOL )pointInside:(CGPoint)point withEvent:(UIEvent *)event { [target performSelector: @selector (endEdit)]; return YES ; } -( void )setTarget:( id )d { ypos = 0; target = d; } -( BOOL )touchesShouldBegin:( NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view { return YES ; } - ( void )dealloc { [ super dealloc]; } |
在需要调用的Controller的.h文件添加对UITextFieldDelegate的引用,代码如下:
#import "BaseTextFieldView.h" |
@interface DemoController : UIViewController <UITextFieldDelegate>{ } |
将xib文件的view,改成对BaseTextFieldView的引用,如图:
在Controller的.m文件中,添加代码:
[(BaseTextFieldView *) self .view setTarget: self ]; |
以上两种方法经测试均可实现。