在做項(xiàng)目的過程中，會(huì)有些點(diǎn)擊某個(gè)View彈出選擇器（UIPickerView）的需求（如同下圖），如果這個(gè)View是UITextField或者UITextView這樣可編輯的View還好說，直接就可以呼出鍵盤，然后直接操作inputView就好，那么蛋疼的來了。。點(diǎn)擊非可編輯文字的View呼出選擇器（UIPickerView）怎么辦？下面就分享下我是如何解決這個(gè)問題的。。
方案1（比較簡單，相對比較low，但可定制性較強(qiáng)）:
自定義一個(gè)View，最下面放一個(gè)UIPickerView，View的上面放取消和完成按鈕，點(diǎn)擊View的時(shí)候?qū)憘€(gè)UIView動(dòng)畫彈出來就可以了，簡單到不行，定制性也較強(qiáng)。
方案2（這篇文章主要介紹這種方法）:
@property(strong,nonatomic,readwrite)UIToolbar*inputAccessoryView;
@property(strong,nonatomic,readwrite)UIPickerView*inputView;
首先要讓你定制的這個(gè)View的inputAccessoryView，和inputView這兩個(gè)屬性可讀可寫，如果不這樣做你是沒有權(quán)限來操作它們的。
下一步，重寫 -(UIToolbar*)inputAccessoryView 、 -(UIPickerView*)inputView 和 - (BOOL)canBecomeFirstResponder方法：
-(UIToolbar*)inputAccessoryView{
if(!_inputAccessoryView){
UIToolbar*toolBar = [[UIToolbaralloc]initWithFrame:CGRectMake(0, 0,SCREEN_WIDTH, 44)];
toolBar.tintColor=SYSTEM_COLOR;
toolBar.backgroundColor= [UIColorcolorWithHexStr:@"$f1f1f1"];
UIBarButtonItem*left = [[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCanceltarget:selfaction:@selector(cancel)];
UIBarButtonItem*fix = [[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpacetarget:selfaction:@selector(fix)];
UIBarButtonItem*right = [[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDonetarget:selfaction:@selector(done)];
toolBar.items= [NSArrayarrayWithObjects:left,fix,right,nil];
returntoolBar;
}
return_inputAccessoryView;
}
-(UIPickerView*)inputView
{
if(!_inputView){
_inputView= [[UIPickerViewalloc]init];
_inputView.backgroundColor= [UIColorcolorWithHexStr:@"#f1f1f1"];
_inputView.bounds=CGRectMake(0, 0,SCREEN_WIDTH,SCREEN_HEIGHT/3);
_inputView.delegate=self;
_inputView.dataSource=self;
_inputView.showsSelectionIndicator=YES;
}
return_inputView;
}
-(void)done
{
[selfhideInputView];
if(self.delegate) {
if(![self.dataSourceobjectAtIndex:self.selectIndex]) {
return;
}
[self.delegateloanHeaderItem:selfdidSelectValue:[self.dataSourceobjectAtIndex:self.selectIndex]atIndex:self.selectIndex];
}
}
- (void)cancel
{
[selfhideInputView];
}
- (void)fix
{
}
- (void)showInputView
{
UIWindow* window =self.window;
self.bview= [[UIViewalloc]initWithFrame:CGRectMake(0, 0,SCREEN_WIDTH,SCREEN_HEIGHT)];
self.bview.backgroundColor= [UIColorblackColor];
UITapGestureRecognizer* tap = [[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(hideInputView)];
[self.bviewaddGestureRecognizer:tap];
self.bview.alpha= 0.3;
[windowaddSubview:self.bview];
}
- (void)hideInputView
{
[selfresignFirstResponder];
[self.bviewremoveFromSuperview];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView
{
return1;
}
- (NSString*)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if(![self.dataSourceobjectAtIndex:row]) {
return@"";
}
returnself.dataSource[row];
}
- (NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component
{
returnself.dataSource.count;
}
- (void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
self.selectIndex= row;
}
- (BOOL)canBecomeFirstResponder
{
[selfshowInputView];
returnYES;
}
- (NSMutableArray*)dataSource
{
if(!_dataSource) {
_dataSource= [NSMutableArrayarrayWithObjects:@"1",@"2",@"3",@"5",@"6",@"7",@"8",@"9",nil];
}
return_dataSource;
}
OK，到這里這個(gè)View就定制完成了，要讓這個(gè)View彈出Picker就還差最后一步了。
[view對象 becomeFirstResponder];
在點(diǎn)擊的時(shí)候調(diào)用一下becomeFirstResponder對象方法就OK了。
方案3:
在做完這個(gè)功能之后。。。發(fā)現(xiàn)有個(gè)叫ActionSheetPicker的三方。。。喜歡用三方的朋友可以用這個(gè)，功能和效果都不錯(cuò)。。很流暢。。
可以通過pod安裝：
pod'ActionSheetPicker-3.0','~> 1.6.1'
OK，這就是目前我所掌握的點(diǎn)擊任意View彈出Picker的三種方法啦。。第一種可能有些扯淡，對于對樣式UI要求比較高的公司也是種不錯(cuò)的選擇。
