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在 Jetpack Compose 中实现 iOS 风格输入框

要在 Android Compose 中模仿 iOS 风格的输入框，我们需要关注几个关键特点：简洁的边框、圆角设计、特定的交互效果等。以下是完整的实现方案：

1. 基础 iOS 风格输入框

@Composable
fun IosStyleTextField(value: String,onValueChange: (String) -> Unit,modifier: Modifier = Modifier,label: String? = null,placeholder: String? = null
) {Column(modifier = modifier) {label?.let {Text(text = it,style = MaterialTheme.typography.bodyMedium,color = Color.Gray,modifier = Modifier.padding(bottom = 4.dp))}Box(modifier = Modifier.fillMaxWidth().background(color = Color.White,shape = RoundedCornerShape(10.dp)).border(width = 1.dp,color = Color(0xFFC7C7CC),shape = RoundedCornerShape(10.dp)).padding(horizontal = 16.dp, vertical = 12.dp)) {BasicTextField(value = value,onValueChange = onValueChange,modifier = Modifier.fillMaxWidth(),textStyle = MaterialTheme.typography.bodyMedium.copy(color = Color.Black),singleLine = true,decorationBox = { innerTextField ->if (value.isEmpty() && placeholder != null) {Text(text = placeholder,style = MaterialTheme.typography.bodyMedium.copy(color = Color(0xFFC7C7CC)))}innerTextField()})}}
}// 使用示例
var text by remember { mutableStateOf("") }
IosStyleTextField(value = text,onValueChange = { text = it },label = "用户名",placeholder = "请输入用户名",modifier = Modifier.padding(16.dp)
)

2. 带清除按钮的 iOS 风格输入框

@Composable
fun IosStyleTextFieldWithClear(value: String,onValueChange: (String) -> Unit,modifier: Modifier = Modifier,label: String? = null,placeholder: String? = null
) {Column(modifier = modifier) {label?.let {Text(text = it,style = MaterialTheme.typography.bodyMedium,color = Color.Gray,modifier = Modifier.padding(bottom = 4.dp))}Box(modifier = Modifier.fillMaxWidth().background(color = Color.White,shape = RoundedCornerShape(10.dp)).border(width = 1.dp,color = if (value.isNotEmpty()) Color(0xFF007AFF) else Color(0xFFC7C7CC),shape = RoundedCornerShape(10.dp)).padding(horizontal = 16.dp, vertical = 12.dp)) {Row(verticalAlignment = Alignment.CenterVertically,modifier = Modifier.fillMaxWidth()) {BasicTextField(value = value,onValueChange = onValueChange,modifier = Modifier.weight(1f),textStyle = MaterialTheme.typography.bodyMedium.copy(color = Color.Black),singleLine = true,decorationBox = { innerTextField ->if (value.isEmpty() && placeholder != null) {Text(text = placeholder,style = MaterialTheme.typography.bodyMedium.copy(color = Color(0xFFC7C7CC)))}innerTextField()})if (value.isNotEmpty()) {IconButton(onClick = { onValueChange("") },modifier = Modifier.size(20.dp)) {Icon(imageVector = Icons.Default.Close,contentDescription = "清除",tint = Color(0xFFC7C7CC),modifier = Modifier.size(16.dp))}}}}}
}

3. 搜索框样式

@Composable
fun IosStyleSearchField(value: String,onValueChange: (String) -> Unit,modifier: Modifier = Modifier,placeholder: String = "搜索"
) {Box(modifier = modifier.fillMaxWidth().height(36.dp).background(color = Color(0xFFF2F2F7),shape = RoundedCornerShape(10.dp)).padding(horizontal = 8.dp),contentAlignment = Alignment.CenterStart) {Row(verticalAlignment = Alignment.CenterVertically,modifier = Modifier.fillMaxWidth()) {Icon(imageVector = Icons.Default.Search,contentDescription = "搜索",tint = Color(0xFF8E8E93),modifier = Modifier.size(16.dp).padding(end = 4.dp))BasicTextField(value = value,onValueChange = onValueChange,modifier = Modifier.weight(1f),textStyle = MaterialTheme.typography.bodyMedium.copy(color = Color.Black,fontSize = 14.sp),singleLine = true,decorationBox = { innerTextField ->if (value.isEmpty()) {Text(text = placeholder,style = MaterialTheme.typography.bodyMedium.copy(color = Color(0xFF8E8E93),fontSize = 14.sp))}innerTextField()})if (value.isNotEmpty()) {IconButton(onClick = { onValueChange("") },modifier = Modifier.size(20.dp)) {Icon(imageVector = Icons.Default.Close,contentDescription = "清除",tint = Color(0xFF8E8E93),modifier = Modifier.size(16.dp))}}}}
}

4. 带分段的 iOS 风格表单

@Composable
fun IosStyleForm(items: List<Pair<String, @Composable () -> Unit>>,modifier: Modifier = Modifier
) {Column(modifier = modifier.background(Color.White).clip(RoundedCornerShape(10.dp))) {items.forEachIndexed { index, (title, content) ->Column {if (index > 0) {Divider(color = Color(0xFFC6C6C8),thickness = 0.5.dp,modifier = Modifier.padding(horizontal = 16.dp))}Row(modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 12.dp),verticalAlignment = Alignment.CenterVertically,horizontalArrangement = Arrangement.SpaceBetween) {Text(text = title,style = MaterialTheme.typography.bodyMedium.copy(color = Color.Black),modifier = Modifier.weight(1f))Box(modifier = Modifier.weight(1f)) {content()}}}}}
}// 使用示例
var username by remember { mutableStateOf("") }
var password by remember { mutableStateOf("") }IosStyleForm(items = listOf("账号" to {BasicTextField(value = username,onValueChange = { username = it },modifier = Modifier.fillMaxWidth(),textStyle = MaterialTheme.typography.bodyMedium.copy(textAlign = TextAlign.End))},"密码" to {BasicTextField(value = password,onValueChange = { password = it },modifier = Modifier.fillMaxWidth(),textStyle = MaterialTheme.typography.bodyMedium.copy(textAlign = TextAlign.End),visualTransformation = PasswordVisualTransformation())}),modifier = Modifier.padding(16.dp)
)

5. 动画效果增强

@Composable
fun AnimatedIosTextField(value: String,onValueChange: (String) -> Unit,modifier: Modifier = Modifier,label: String,placeholder: String
) {val animatedBorderColor by animateColorAsState(targetValue = if (value.isNotEmpty()) Color(0xFF007AFF) else Color(0xFFC7C7CC),label = "borderColorAnimation")Column(modifier = modifier) {Text(text = label,style = MaterialTheme.typography.bodyMedium,color = Color.Gray,modifier = Modifier.padding(bottom = 4.dp))Box(modifier = Modifier.fillMaxWidth().background(color = Color.White,shape = RoundedCornerShape(10.dp)).border(width = 1.dp,color = animatedBorderColor,shape = RoundedCornerShape(10.dp)).padding(horizontal = 16.dp, vertical = 12.dp)) {BasicTextField(value = value,onValueChange = onValueChange,modifier = Modifier.fillMaxWidth(),textStyle = MaterialTheme.typography.bodyMedium.copy(color = Color.Black),singleLine = true,decorationBox = { innerTextField ->Box {if (value.isEmpty()) {Text(text = placeholder,style = MaterialTheme.typography.bodyMedium.copy(color = Color(0xFFC7C7CC)))}innerTextField()}})}}
}

关键 iOS 风格特点实现

1. 圆角设计：

   shape = RoundedCornerShape(10.dp)
   

2. 边框颜色：

   borderColor = if (focused) Color(0xFF007AFF) else Color(0xFFC7C7CC)
   

3. 占位符样式：

   color = Color(0xFFC7C7CC)
   

4. 清除按钮：

   Icon(Icons.Default.Close, contentDescription = "清除")
   

5. 分段列表样式：

   Divider(color = Color(0xFFC6C6C8), thickness = 0.5.dp)
   

这些组件可以根据你的具体需求进一步定制，调整颜色、尺寸和动画效果，以达到更接近 iOS 设计风格的效果。