1.自定义一个自己的UITextField类,在类中实现如下代码:
方法一:利用UITextField属性attributedPlaceholder直接设置
-(void)awakeFromNib{ [super awakeFromNib]; //光标颜色 self.tintColor = [UIColor whiteColor]; //占位文字颜色 [self addTarget:self action:@selector(startEditTextField) forControlEvents:UIControlEventEditingDidBegin]; [self addTarget:self action:@selector(endEditTextField) forControlEvents:UIControlEventEditingDidEnd]; } -(void)startEditTextField{ NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; dict[NSForegroundColorAttributeName] = [UIColor whiteColor]; self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder attributes:dict]; } -(void)endEditTextField{ NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; dict[NSForegroundColorAttributeName] = [UIColor grayColor]; self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder attributes:dict]; }
方法二:利用用KVC获取TextField系统属性设置
-(void)awakeFromNib{ [super awakeFromNib]; //光标颜色 self.tintColor = [UIColor whiteColor]; //占位文字颜色 [self addTarget:self action:@selector(startEditTextField) forControlEvents:UIControlEventEditingDidBegin]; [self addTarget:self action:@selector(endEditTextField) forControlEvents:UIControlEventEditingDidEnd]; } -(void)startEditTextField{ UILabel *placeholderLabel = [self valueForKey:@"placeholderLabel"];//方法实现:首先找有没有这样的get方法,没有则继续找placeholderLabel这个成员属性,还没有则接着找_placeholderLabel placeholderLabel.textColor = [UIColor whiteColor]; } -(void)endEditTextField{ UILabel *placeholderLabel = [self valueForKey:@"placeholderLabel"]; placeholderLabel.textColor = [UIColor grayColor]; }
原文：http://www.cnblogs.com/sivek/p/6853201.html