我可以使用自定義圖標代替安全UITextField中的點嗎？

Question

用於Secure Text Fields的點iOS7.1比以前的要大，而且非常難看。

我可以用different icon代替這些標準點嗎？如果是這樣，我該怎麼做？

Answer 1

你可以試試下面的代碼：

/* don't ever use this PROOF OF CONCEPT CODE for production use */ 
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{ 
if (self.backing == nil) self.backing = @""; 
static BOOL pasting = false; 

if (!pasting) 
{  
    self.backing = [self.backing stringByReplacingCharactersInRange:range withString:string]; 
    NSLog(@"backing: %@",self.backing); 
    if ([string length] == 0) return YES; // early bail out when just deleting chars 

    NSString *sec = @""; 
    for (int i=0;i<[string length]; i++) sec = [sec stringByAppendingFormat:@"■"]; 

    pasting = true; 
    [[UIPasteboard generalPasteboard] setString:sec]; 
    [textField paste:self]; 

    return NO; 
} else { 
    pasting = false; 
    return YES; 
}  
}