iOS文本视图（Text View）
IOS文本视图的使用
文本视图用于显示多行滚动的文本。
重要属性
- dataDetectorTypes
- delegate
- editable
- inputAccessoryView
- inputView
- text
- textAlignment
- textColor
重要的委托方法
-(void)textViewDidBeginEditing:(UITextView *)textView
-(void)textViewDidEndEditing:(UITextView *)textView
-(void)textViewDidChange:(UITextView *)textView
-(BOOL)textViewShouldEndEditing:(UITextView *)textView
添加自定义方法 addTextView
-(void)addTextView{
myTextView = [[UITextView alloc]initWithFrame:
CGRectMake(10, 50, 300, 200)];
[myTextView setText:@"Lorem ipsum dolor sit er elit lamet, consectetaur
cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et
dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation
ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat
nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum. Nam liber te
conscient to factor tum poen legum odioque civiuda.
Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing
pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aiqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi
aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit
in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa
qui officia deserunt mollit anim id est laborum. Nam liber te conscient
to factor tum poen legum odioque civiuda."];
myTextView.delegate = self;
[self.view addSubview:myTextView];
}
在 ViewController.m 中执行 textView 委托
#pragma mark - Text View delegates
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:
(NSRange)range replacementText:(NSString *)text{
if ([text isEqualToString:@"n"]) {
[textView resignFirstResponder];
}
return YES;
}
-(void)textViewDidBeginEditing:(UITextView *)textView{
NSLog(@"Did begin editing");
}
-(void)textViewDidChange:(UITextView *)textView{
NSLog(@"Did Change");
}
-(void)textViewDidEndEditing:(UITextView *)textView{
NSLog(@"Did End editing");
}
-(BOOL)textViewShouldEndEditing:(UITextView *)textView{
[textView resignFirstResponder];
return YES;
}
修改 ViewController.m 中的 viewDidLoad方法，如下所示
(void)viewDidLoad
{
[super viewDidLoad];
[self addTextView];
}
结果输出
现在当我们运行该应用程序我们会看到下面的输出
