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UITextView * textView = [[UITextView alloc] initWithFrame:[UIScreen mainScreen].bounds];
/*
1、设置文本属性：text；
2、设置文字对齐方式属性：textAlignment；
3、设置文字颜色属性：textColor；
4、设置文字字体属性：font；
5、设置编辑使能属性：editable；
6、设置背景颜色属性：backgroundColor；
7、圆角边框：layer.cornerRadius、layer.borderWidth。
*/
textView.backgroundColor = [UIColor blueColor];
textView.text = @"aaasddddddddddd";
textView.font = [UIFont systemFontOfSize:50];
textView.textAlignment = NSTextAlignmentCenter;
textView.editable = YES;
textView.selectable = YES;//里面的内容是否可以交互,例如网址
/*
UIDataDetectorTypePhoneNumber     // 手机
UIDataDetectorTypeLink        // URL
UIDataDetectorTypeAddress  // 街道地址
UIDataDetectorTypeCalendarEvent  // 事件
UIDataDetectorTypeNone          = 0,
UIDataDetectorTypeAll
*/
textView.dataDetectorTypes = UIDataDetectorTypeAll;
textView.allowsEditingTextAttributes = YES;//允许编辑文本属性
textView.typingAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:50]};
/*
UIKeyboardTypeDefault,
UIKeyboardTypeASCIICapable,     ASCII
UIKeyboardTypeNumbersAndPunctuation,  //数字和符号
UIKeyboardTypeURL,                    //  URL
UIKeyboardTypeNumberPad,              // 纯数字
UIKeyboardTypePhonePad,               //(1-9, *, 0, #, with letters under the numbers).
UIKeyboardTypeNamePhonePad,           // 数字跟字母
UIKeyboardTypeEmailAddress,           // email
UIKeyboardTypeDecimalPad  // 数字跟.
UIKeyboardTypeTwitter // A type optimized for twitter text entry (easy access to @ #)
UIKeyboardTypeWebSearch // A default keyboard type with URL-oriented addition (shows space . prominently).
UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated
*/
textView.keyboardType = UIKeyboardTypeWebSearch;
/*
UIReturnKeyDefault,
UIReturnKeyGo,
UIReturnKeyGoogle,
UIReturnKeyJoin,
UIReturnKeyNext,
UIReturnKeyRoute,
UIReturnKeySearch,
UIReturnKeySend,
UIReturnKeyYahoo,
UIReturnKeyDone,
UIReturnKeyEmergencyCall,
UIReturnKeyContinue NS_ENUM_AVAILABLE_IOS(9_0),
*/
textView.returnKeyType = UIReturnKeyGo;
textView.layer.cornerRadius = 10;//圆角
textView.layer.borderWidth = 3;//边框
// 7、圆角边框：layer.cornerRadius、layer.borderWidth。
[self.view addSubview:textView];

这里基本所有的系统方法都有了,欢迎补充

/*
1、将要开始编辑：textViewShouldBeginEditing；
2、将要完成编辑：textViewShouldEndEditing；
3、开始编辑：textViewDidBeginEditing；
4、完成编辑：textViewDidEndEditing；
3、将要改变内容：shouldChangeTextInRange；
4、内容完成改变：textViewDidChange；
5、内容被选中：textViewDidChangeSelection。
*/
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{

return YES;
}
- (BOOL)textViewShouldEndEditing:(UITextView *)textView{

return YES;
}

- (void)textViewDidBeginEditing:(UITextView *)textView{

// 3、开始编辑：textViewDidBeginEditing；

}
- (void)textViewDidEndEditing:(UITextView *)textView{

// 4、完成编辑：textViewDidEndEditing；

}

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

// 3、将要改变内容：shouldChangeTextInRange；
return YES;
}
- (void)textViewDidChange:(UITextView *)textView{

// 4、内容完成改变：textViewDidChange；

}

- (void)textViewDidChangeSelection:(UITextView *)textView{

//5、内容被选中：textViewDidChangeSelection。

}

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange NS_AVAILABLE_IOS(7_0){

return YES;//url

}
- (BOOL)textView:(UITextView *)textView shouldInteractWithTextAttachment:(NSTextAttachment *)textAttachment inRange:(NSRange)characterRange NS_AVAILABLE_IOS(7_0){

return YES;//文本副本
}