UITextField 的简单用法

UITextField *_tfInput = [[UITextField alloc]init];
_tfInput.tintColor = [UIColor whiteColor];
_tfInput.clearButtonMode=UITextFieldViewModeWhileEditing;
_tfInput.textColor = [UIColor whiteColor];
[_tfInput setKeyboardType:UIKeyboardTypeDefault];
//设置Placeholder 颜色 内容 字体大小
 _tfInput.attributedPlaceholder = [[NSAttributedString alloc]initWithString:@"输入约跑主题" attributes:@{NSForegroundColorAttributeName:[�UIColor whiteColor],NSFontAttributeName:[UIFont systemFontOfSize:14.f]}];
[self.contentView addSubview:_tfInput];

补充：更改UITextField右边按钮的图片

MBTextField 继承 UITextField

@implementation MBTextField

- (instancetype)init
{
    self = [super init];
    if (self) {
//        [self setBackgroundColor:[UIColor redColor]];
        [self setTextColor:[UISystemColor getSystemWhite]];
        [self setTintColor:[UIColor whiteColor]];
        [self setKeyboardType:UIKeyboardTypeNumberPad];
        [self setClearButtonMode:UITextFieldViewModeWhileEditing];        
    }
    return self;
}

- (void)layoutSubviews{
    [super layoutSubviews];
    [self setClearButtonColor];
}

- (UIButton *)getClearButton{
    for(UIView *v in self.subviews)
    {
        if([v isKindOfClass:[UIButton class]])
        {
            UIButton *clearButton = (UIButton *) v;
            return clearButton;
        }
    }
    return nil;
}

- (void)setClearButtonColor{
    UIButton *clearButton = [self getClearButton];
    if(clearButton){
        [clearButton setImage:[UIImage imageNamed:@"login_del"] forState:UIControlStateNormal];
    }
}