UITextField限制字数的方法 .
2011-10-24 12:06
253 查看
在输入东西的时候,如果想限制最大字数,可以用下面方法
view plaincopy to clipboardprint?
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;
{
if ([string isEqualToString:@"\n"])
{
return YES;
}
NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];
if (self.myTextField == textField)
{
if ([toBeString length] > 20) {
textField.text = [toBeString substringToIndex:20];
UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:nil message:@"超过最大字数不能输入了" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil] autorelease];
[alert show];
return NO;
}
}
return YES;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;{if ([string isEqualToString:@"\n"]) {return YES;}NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];if (self.myTextField == textField) {if ([toBeString length] > 20) {textField.text = [toBeString substringToIndex:20];UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:nil message:@"超过最大字数不能输入了" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil] autorelease];[alert show];return NO;}} return YES;}
view plaincopy to clipboardprint?
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;
{
if ([string isEqualToString:@"\n"])
{
return YES;
}
NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];
if (self.myTextField == textField)
{
if ([toBeString length] > 20) {
textField.text = [toBeString substringToIndex:20];
UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:nil message:@"超过最大字数不能输入了" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil] autorelease];
[alert show];
return NO;
}
}
return YES;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;{if ([string isEqualToString:@"\n"]) {return YES;}NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];if (self.myTextField == textField) {if ([toBeString length] > 20) {textField.text = [toBeString substringToIndex:20];UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:nil message:@"超过最大字数不能输入了" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil] autorelease];[alert show];return NO;}} return YES;}
相关文章推荐
- uitextField限制字数方法和抖动效果
- 限制UITextField的输入字数(长度)最正确的方法
- UITextField限制字数的方法
- 限制UITextField的输入字数(长度)最正确的方法
- UItextfield 限制输入字数 奔溃解决的新方法
- UITextField限制字数的方法
- 解决iOS7上UITextField 或者 UITextView限制字数输入导致崩溃问题的方法
- 解决iOS7上UITextField限制字数输入导致崩溃问题的方法
- UITextField限制字数的方法
- Swift 限制UITextField字数的方法
- UITextField限制字数的方法
- UITextField限制字数的方法
- IOS 开发之 UITextField限制字数的方法
- UITextField限制字数方法
- UITextField限制字数的方法
- UITextField限制字数的方法
- UITextField,UITextView字数限制
- 限制UITextField的输入只为数字的方法
- UITextField 限制用户输入小数点后位数的方法
- iOS中UITextField的字数限制 emoji被截断问题