禁用 UITextField 时如何在 leftView/rightView 中启用点击?
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【中文标题】禁用 UITextField 时如何在 leftView/rightView 中启用点击?【英文标题】:How to enable tap in leftView/rightView when UITextField disabled? 【发布时间】:2016-02-29 13:53:42 【问题描述】:我有一个UITextField
,我在rightView
中添加了一张图片。我已向此 rightView
添加了一个手势,我希望在禁用 UITextField
时使其工作,因为此视图仅在未编辑时显示。
这是我想要实现的图像示例:
leftView 只是一个空白区域; rightView 只有图像。这是用于将外观应用到UITextField
并将图像应用到rightView 的代码:
- (void)applyAppearanceToTextField:(UITextField *)textField withRoundingCorner:(UIRectCorner)corner withIcon:(NSString *)icon
CAShapeLayer *shape = [[CAShapeLayer alloc] initWithLayer:textField.layer.mask];
UIBezierPath *shadow = [UIBezierPath bezierPathWithRoundedRect:textField.bounds byRoundingCorners:corner cornerRadii:CGSizeMake(5, 5)];
shape.path = shadow.CGPath;
textField.layer.mask = shape;
// Apply space to the left as a padding
[textField setLeftView:[[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, textField.bounds.size.height)]];
[textField setLeftViewMode:UITextFieldViewModeAlways];
// Add the icon image to the right view
CGFloat height = textField.bounds.size.height;
UIImage *image = [UIImage imageWithIcon:icon backgroundColor:[UIColor clearColor] iconColor:[UIColor grayColor] andSize:CGSizeMake(height / 2, height / 2)];
image = [UIImage imageWithCGImage:image.CGImage scale:image.scale orientation:UIImageOrientationUpMirrored];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[imageView setBounds:CGRectMake(5, 0, image.size.width, image.size.width)];
[imageView setUserInteractionEnabled:YES];
[textField setRightView:imageView];
[textField setRightViewMode:UITextFieldViewModeUnlessEditing];
[textField.rightView setExclusiveTouch:YES];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleIconTap:)];
[textField.rightView addGestureRecognizer:tapGesture];
- (void)handleIconTap:(UITapGestureRecognizer *)gesture
NSLog(@"handleIconTap");
在viewDidLoad
中,我检查该字段是否已填写,因此该字段被禁用。当UITextField
被禁用时,如何在leftView/rightView中启用点击?
【问题讨论】:
嗨,请放一些代码或图像以便更好地理解... @ilesh 更详细地编辑了问题。 【参考方案1】:我建议这样做:
您可以在 View 中嵌入 TextField 和 UIButton(或 UIImage,如果需要),并为您的 View 设置颜色和角半径
【讨论】:
【参考方案2】:我使用默认的 UITextField 组件解决了这个问题。我创建了一个布尔属性来处理是否应该启用字段的值,该字段设置为viewDidLoad
:
isEditEnabled = (self.myTextField.text != nil && self.myTextField.text.lenght > 0);
然后,我实现textFieldShouldBeginEditing
以在单击此UITextField
时返回isEditEnabled
的值,实现textFieldDidBeginEditing
将textField 的backgroundColor 设置为白色并实现textFieldDidEndEditing
以设置backgroundColor如果 myTextField 已填充,则设置为深灰色并设置 isEditEnabled = NO
。代码如下:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
if (textField == self.myTextField)
return isEditEnabled;
return YES;
- (void)textFieldDidBeginEditing:(UITextField *)textField
textField.backgroundColor = [UIColor whiteColor];
activeField = textField;
- (void)textFieldDidEndEditing:(UITextField *)textField
if (textField.text != nil && textField.text.length > 0)
if (textField == self.myTextField)
textField.backgroundColor = [UIColor colorWithWhite:0.80f alpha:1.0f];
isEditEnabled = NO;
else
textField.backgroundColor = [UIColor whiteColor];
if (textField == self.url)
isEditEnabled = YES;
activeField = nil;
这样,我的目标是始终启用 leftView 和 rightView 以进行点击。
【讨论】:
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