UITextView的使用

来源：互联网发布：神武手游多开软件编辑：程序博客网时间：2024/05/16 19:00

UITextView与UITextField功能类似，也是字符输入的视图控件。

区别在于：

1、UITextView是多行字符输入，可通过回车键进行换行输入

2、也可以设置固定高度的范围，输入多行字符，然后通过上下滚动显示输入的字符

3、无左，或右间距视图

4、无清除按钮视图

UITextView *textview001 = [[UITextView alloc] initWithFrame:CGRectMake(10.0, 50.0, 300.0, 80.0)];

// view的属性// 添加到父视图[self.view addSubview:textview001];// 背景颜色textview001.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.3];// 圆角设置textview001.layer.cornerRadius = 5.0;textview001.layer.masksToBounds = YES;// 边框设置textview001.layer.borderWidth = 1.0;textview001.layer.borderColor = [UIColor blackColor].CGColor;// 字体属性设置textview001.textColor = [UIColor brownColor];textview001.textAlignment = NSTextAlignmentRight;textview001.font = [UIFont systemFontOfSize:12.0];

// 键盘类型textview001.keyboardType = UIKeyboardTypeASCIICapable;// 回车键类型textview001.returnKeyType = UIReturnKeyNext;// 回车键响应条件，有输入时才能响应，默认为NO，即没有限制textview001.enablesReturnKeyAutomatically = NO;

// 改变输入源视图，默认是键盘UIImageView *inputImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, CGRectGetWidth(self.view.bounds), 100.0)];inputImageView.image = [UIImage imageNamed:@"inputImage"];textview001.inputView = inputImageView;

// 改变键盘上方的子视图UIButton *accessoryButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, CGRectGetWidth(self.view.bounds), 40.0)];accessoryButton.backgroundColor = [UIColor redColor];[accessoryButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];[accessoryButton setTitleColor:[UIColor yellowColor] forState:UIControlStateHighlighted];[accessoryButton setTitle:@"隐藏键盘" forState:UIControlStateNormal];[accessoryButton addTarget:self action:@selector(hiddionKeyboard) forControlEvents:UIControlEventTouchUpInside];textview001.inputAccessoryView = accessoryButton;

// 隐藏键盘的按钮方法- (void)hiddionKeyboard{    // 方法1//        [textView endEditing:YES];    // 方法2//        [textView resignFirstResponder];    // 方法3//        [self.view endEditing:YES];    // 方法4    [[UIApplication sharedApplication].keyWindow endEditing:YES];}

/*设置代理1、设置UITextView代理方法的响应者2、添加协议3、实现代理方法*/textview001.delegate = self;

// 添加协议@interface ViewController () <UITextViewDelegate>@end// 实现代理方法UITextViewDelegate- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{    // 即将开始编辑    NSLog(@"即将开始编辑");        return YES;}- (BOOL)textViewShouldEndEditing:(UITextView *)textView{    // 即将结束编辑    NSLog(@"即将结束编辑");        return YES;}- (void)textViewDidBeginEditing:(UITextView *)textView{    // 已经开始编辑    NSLog(@"已经开始编辑");}- (void)textViewDidEndEditing:(UITextView *)textView{    // 已经结束编辑    NSLog(@"已经结束编辑");}- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{    // 正在编辑    NSString *string = [textView.text stringByReplacingCharactersInRange:range withString:text]; // NSString *string = textView.text;    NSLog(@"正在编辑 %@", string);        /*     通常用途     1、判断回车键，结束编辑     2、限制规定字符的输入     3、限制长度字符的输入    */        if ([text isEqualToString:@"\n"])    {        // 结束编辑，即隐藏键盘        [self hiddionKeyboard];                return NO; // 表示不能输入，反之则可输入    }        return YES;}- (void)textViewDidChange:(UITextView *)textView{    // 正在编辑的改变    NSLog(@"正在编辑的改变");}

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