UITextView学习笔记

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UITextView

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1.UITextView常用属性

- (void)viewDidLoad {

[super viewDidLoad];

//天生就会滚动，就是UIScrollView的子类

//ViewController试图控制器一旦检测到自己是在NavigationController中，就会把可以滚动的视图留出一个导航栏高度的位置，因为会滚动的视图通常被设计为全屏使用。反之如果没被装在NavigationController中系统不会给你留白。

//解决方案:

self.automaticallyAdjustsScrollViewInsets = NO;

UITextView * tv = [[UITextView alloc]initWithFrame:CGRectMake(10, 100, 300, 100)];

tv.backgroundColor = [UIColor orangeColor];

//设置字体

tv.font = [UIFont systemFontOfSize:30];

//设置字体颜色

tv.textColor = [UIColor blueColor];

//设置文字对齐方式

tv.textAlignment = NSTextAlignmentLeft;

//设置是否滚动

tv.scrollEnabled = YES;

//设置键盘色彩

tv.keyboardAppearance = UIKeyboardAppearanceAlert;

//设置键盘样式

tv.keyboardType = UIKeyboardTypeDefault;

//设置return按键的样式

tv.returnKeyType = UIReturnKeyDone;

//设置是否自动大小写

tv.autocapitalizationType = UITextAutocapitalizationTypeNone;

//设置是否自动纠错

tv.autocorrectionType = UITextAutocorrectionTypeNo;

//设置自定义键盘

UIView * keyView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 0, 300)];

keyView.backgroundColor = [UIColor greenColor];

//tv.inputView = keyView;

//设置二级键盘

tv.inputAccessoryView = nil;

//设置禁止编辑

tv.editable = YES;

//设置文本内容

tv.text = @"真是全都忘了";

//设置不能进行交互

tv.userInteractionEnabled = YES;

//控制器没有tag，只有UIView子类有

tv.tag = 100;

//设置代理

tv.delegate = self;

[self.view addSubview:tv];

self.view.backgroundColor = [UIColor whiteColor];

}

2.UITextView常用代理方法

#pragma mark - 实现代理

-(BOOL)textViewShouldBeginEditing:(UITextView *)textView

{

NSLog(@"将要开始编辑，返回YES允许编辑，NO不允许");

return YES;

}

-(BOOL)textViewShouldEndEditing:(UITextView *)textView

{

NSLog(@"将要结束编辑,返回YES允许，NO不允许");

return YES;

}

-(void)textViewDidBeginEditing:(UITextView *)textView

{   //焦点不在tv身上

NSLog(@"已经开始编辑");

}

-(void)textViewDidEndEditing:(UITextView *)textView

{

NSLog(@"已经结束编辑");

}

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{

NSLog(@"当文本内容将要发生改变，参考UITextField");

return YES;

}

-(void)textViewDidChange:(UITextView *)textView

{

NSLog(@"当文本内容已经改变");

}

-(void)textViewDidChangeSelection:(UITextView *)textView

{

NSLog(@"选中的内容发生改变");

//获取选中文本的范围

NSRange range = textView.selectedRange;

//把选中文本得到

NSString * str = [textView.text substringWithRange:range];

NSLog(@"您选中了%@",str);

}