2020-06-25

UITextField添加提示颜色

#import "UITextField+XMGExtension.h"

static NSString * const XMGPlaceholderColorKey = @"placeholderLabel.textColor";

@implementationUITextField(XMGExtension)

- (void)setPlaceholderColor:(UIColor*)placeholderColor

{

    // 提前设置占位文字, 目的 : 让它提前创建placeholderLabel

    NSString*oldPlaceholder =self.placeholder;

    self.placeholder = @" ";

    self.placeholder= oldPlaceholder;

    // 恢复到默认的占位文字颜色

    if(placeholderColor ==nil) {

        placeholderColor = [UIColorcolorWithRed:0green:0blue:0.0980392alpha:0.22];

    }

    // 设置占位文字颜色

    [selfsetValue:placeholderColorforKeyPath:XMGPlaceholderColorKey];

}

- (UIColor *)placeholderColor

{

    return [self valueForKeyPath:XMGPlaceholderColorKey];

}