关于iOS不同类型键盘的切换

闲言少叙，立马入正题。。。

开发中用pickerView自定义的键盘与系统默认的键盘之间的切换。希望能帮到要用的朋友。。。

#import "ViewController.h"

@interface ViewController () <UITextViewDelegate, UITextFieldDelegate, UIPickerViewDelegate>

@property (weak, nonatomic) IBOutlet UITextField *textField;
@property (weak, nonatomic) IBOutlet UITextView *textView;

/** 自定义键盘 */
@property (nonatomic, strong) UIPickerView *pickerView;

/** 原因数组 */
@property (nonatomic, strong) NSArray *reasonArray;

/** 如果是第一次则直接保存值，否则不保存 */
@property (nonatomic, assign) BOOL isFirst;

@end

@implementation ViewController

- (IBAction)click:(id)sender {
    [self.textField resignFirstResponder];
}

- (void)viewDidLoad {

    [super viewDidLoad];
    self.textView.delegate = self;
    self.textField.delegate = self;
    self.textField.inputView = self.pickerView;
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self.textField becomeFirstResponder];
}

- (void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
    [self.textField resignFirstResponder];
}

/*****************************************/
#pragma mark - UITextViewDelegate

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView {
    [self.textField resignFirstResponder];
    self.textField.enabled = NO;
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [textView becomeFirstResponder];
    });
    return YES;
}

- (void)textViewDidBeginEditing:(UITextView *)textView {
    self.textField.enabled = YES;
}

#pragma mark - UITextFieldDelegate

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    // 切换键盘
    [self.textView resignFirstResponder];
    self.textView.editable = NO;
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [textField becomeFirstResponder];
    });
    if (_isFirst) {
        [self pickerView:self.pickerView didSelectRow:0 inComponent:1];
        _isFirst = NO;
    }
    return YES;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    self.textView.editable = YES;
}

// 不允许用户输入
- (BOOL)texttitleField:(UITextField *)texttitleField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    return NO;
}

/*******************切换键盘**********************/
#pragma mark - UIPickerViewreasonArraySource
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

// 行数

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return self.reasonArray.count;
}

#pragma mark - UIPickerVeiwDelegate

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return self.reasonArray[row];
}

// 选中某一行

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {  
    self.textField.text = self.reasonArray[row];
}

#pragma mark - 懒加载

- (UIPickerView *)pickerView {
    if (!_pickerView) {
        _pickerView = [[UIPickerView alloc] init];
        _pickerView.backgroundColor = [UIColor lightGrayColor];
//        _pickerView.backgroundColor = [UIColor whiteColor];
        _pickerView.delegate = self;
    }
    return _pickerView;
}

- (NSArray *)reasonArray {
    if (!_reasonArray) {
        _reasonArray = @[@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311",@"121313311"];
    }
    return _reasonArray;
}