Question

如果在文本字段中没有写入任何内容，如何突出显示文本字段并在几秒钟后移除发光？

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Answer 1

1.Import quartzcore framework

2.添加shadowopacity，shadowColor ......像这样，

_textField.layer.shadowOpacity = 1.0;   
_textField.layer.shadowRadius = 0.0;
_textField.layer.shadowColor = [UIColor blackColor].CGColor;
_textField.layer.shadowOffset = CGSizeMake(0.0, -1.0);

Answer 2

#import <QuartzCore/QuartzCore.h>

textField.layer.masksToBounds = NO;
textField.layer.shadowColor = [[UIColor blueColor] CGColor];
textField.layer.shadowOffset = CGSizeZero;
textField.layer.shadowRadius = 10.0f;
textField.layer.shadowOpacity = 1.0;

如果您想在几秒钟后隐藏边框或阴影，请使用此代码..这一个用于2秒后更改，但您可以根据需要添加秒。

[NSTimer scheduledTimerWithTimeInterval:2.0
                             target:self
                           selector:@selector(doSomethingWhenTimeIsUp:)
                           userInfo:nil
                            repeats:NO];
- (void) doSomethingWhenTimeIsUp:(NSTimer*)t {

    // YES! Do something here that you want to hide after few seconds!!
     [textField setBorderStyle:UITextBorderStyleNone];

}

希望这个可以帮助你......

如何突出显示文本域？

2 个答案: