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Category4LimitedUITextField

一个UITextField类的category, 可以一行代码实现对UITextField字数的限制。 使用方法: 1 将 UITextField+MQCustom.h和UITextField+MQCustom.m 文件拖入你的工程 并 #import "UITextField+MQCustom.h" 2.example:

     UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 100, CGRectGetMaxX(self.view.frame), 30)];
      textField.maxLength = 10; //限制长度
     textField.valueChangedBlock = ^(NSString* content){ // 输入内容改变时的监听
       NSLog(@"textField content did changed to :%@",content);        
     };
   [self.view addSubview:textField];