iOS开发textfield的一些方法汇总

1，动态获得textfield 的输入内容

在- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string添加如下代码就可以获得全部的代码。

NSString *text = [textField.text stringByReplacingCharactersInRange:range withString:string];

慢慢添加吧

2,//只允许数字和小数点输入

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

NSString *allText = [textField.text stringByReplacingCharactersInRange:range withString:string];

NSUInteger lengthOfString = string.length;

if ([string isEqualToString:@"."]) {

return YES;

}

for (NSInteger loopIndex = 0; loopIndex < lengthOfString; loopIndex++) {//只允许数字输入

unichar character = [string characterAtIndex:loopIndex];

if (character < 48){

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"只允许输入数字位数" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];

[alert show];

return NO; // 48 unichar for 0

}

if (character > 57){

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"只允许输入数字位数" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];

[alert show];

return NO; // 57 unichar for 9

}

}

return YES;

}