IOS--常用控件--UITextField

1.控制输入的长度（此方法同时可以控制复制粘贴）

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

{

NSString *string0 = [textField.text stringByReplacingCharactersInRange:range withString:string];

NSLog(@"%@",string0);

if (string0.length>15) {

textField.text=[string0 substringToIndex:15];

[[ZCYAlertView defaultAlert] promptMessage:@"名字已经很长了哦！" atDuration:2];

return NO;

}

else

return YES;

}