ios UITextView设置行距

来源：互联网发布：怎么找天使投资知乎编辑：程序博客网时间：2024/06/09 22:26

由于uitextview没有设置行距的方法，所以我们要在uitextview有变化的时候随时改变固定uitextview的行距，而且每当我们输入的是中文的时候，需要判断我们输入的是拼音还是中文再来改变行距，因此我们可以尝试下面的方法：

1、.h文件我们必须先加上 UITextViewDelegate的代理

2、.m文件我们就使用下面方法

- (void) viewDidLoad

{

[superviewDidLoad];

UITextView* tTextView = nil;

tTextView = [[UITextView alloc] init];

tTextView.frame = CGRectMake(left, left, tView.width-left*2, tView.height-left*2);

tTextView.backgroundColor = [UIColor clearColor];

tTextView.delegate = self;

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

paragraphStyle.lineSpacing = 10;// 字体的行间距

NSDictionary *attributes = @{

NSFontAttributeName:[UIFont systemFontOfSize:15],

NSParagraphStyleAttributeName:paragraphStyle

};

tTextView.attributedText = [[NSAttributedString alloc] initWithString:@"内容" attributes:attributes];

// [tTextView setText:s_Default_FK];

// [tTextView setFont:[UIFont FontOfSize:14.f]];

[tTextView setTextColor:[UIColor hexColor:@"aaaaaa"]];

[tTextView setShowsHorizontalScrollIndicator:NO];

[tTextView setShowsVerticalScrollIndicator:NO];

[tView addSubview:tTextView];

tTextView.returnKeyType = UIReturnKeyDone;

// [tTextView becomeFirstResponder];

_tTextView = tTextView;

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(textFiledEditChanged:)

name:@"UITextFieldTextDidChangeNotification"

object:_tTextView];

}

-(void)viewWillDisappear:(BOOL)animated

{

[superviewWillDisappear:YES];

[[NSNotificationCenterdefaultCenter]removeObserver:self

name:@"UITextFieldTextDidChangeNotification"

object:_tTextView];

}

#define kMaxLength 20

-(void)textFiledEditChanged:(NSNotification *)obj{

UITextField *textField = (UITextField *)obj.object;

NSString *toBeString = textField.text;

NSString *lang = [[UITextInputModecurrentInputMode] primaryLanguage];// 键盘输入模式

if ([langisEqualToString:@"zh-Hans"]) {// 简体中文输入，包括简体拼音，健体五笔，简体手写

UITextRange *selectedRange = [textFieldmarkedTextRange];

//获取高亮部分

UITextPosition *position = [textFieldpositionFromPosition:selectedRange.startoffset:0];

// 没有高亮选择的字，则对已输入的文字进行字数统计和限制

if (!position) {

// textview改变字体的行间距

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStylealloc] init];

paragraphStyle.lineSpacing =10;// 字体的行间距

NSDictionary *attributes =@{

NSFontAttributeName:[UIFontsystemFontOfSize:14],// 字体的大小

NSParagraphStyleAttributeName:paragraphStyle

};

_tTextView.attributedText = [[NSAttributedStringalloc] initWithString:_tTextView.textattributes:attributes];

}

// 有高亮选择的字符串，则暂不对文字进行统计和限制

else{

}

// 中文输入法以外的直接对其统计限制即可，不考虑其他语种情况

// else{

// if (toBeString.length > kMaxLength) {

// textField.text = [toBeString substringToIndex:kMaxLength];

// }

}

#pragma mark - -------- UITextViewDelegate ----------

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView

{

if ([[textView.textdeleteSpace] isEqualToString:s_Default_FK]) {

textView.text =@"";

textView.textColor = [UIColorblackColor];

}

returnYES;

}

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

{

if ([textisEqualToString:@"\n"]) {

[textView resignFirstResponder];

if (k_Is_Empty(textView.text)) {

[textView setText:s_Default_FK];

[textView setTextColor:[UIColorlightGrayColor]];

}

returnNO;

}

returnYES;

}

@end

0 0