UITextView使用总结

enum {
NSTextAlignmentLeft      = 0,  左对齐，默认
NSTextAlignmentCenter    = 1,  居中对齐
NSTextAlignmentRight     = 2,  右对齐
NSTextAlignmentJustified = 3,  在一个段落的最后一行自然对齐
NSTextAlignmentNatural   = 4,  默认对齐方式
} NSTextAlignment;

// 设置自动纠错方式
textView.autocorrectionType = UITextAutocorrectionTypeNo;

// 自动纠错方式有以下几种：
enum {
UITextAutocorrectionTypeDefault,  默认
UITextAutocorrectionTypeNo,       不自动纠错
UITextAutocorrectionTypeYes,      自动纠错
} UITextAutocorrectionType;

// 设置自动大写方式
textView.autocapitalizationType = UITextAutocapitalizationTypeNone;

// 自动大写方式有以下几种：
enum {
UITextAutocapitalizationTypeNone,           不自动大写
UITextAutocapitalizationTypeWords,          单词首字母大写
UITextAutocapitalizationTypeSentences,      句子的首字母大写
UITextAutocapitalizationTypeAllCharacters,  所有字母都大写
} UITextAutocapitalizationType;

// 设置键盘的样式
textView.keyboardType = UIKeyboardTypeDefault;

// 键盘样式有以下几种：
enum {
UIKeyboardTypeDefault,                默认键盘，支持所有字符
UIKeyboardTypeASCIICapable,           支持ASCII的默认键盘
UIKeyboardTypeNumbersAndPunctuation,  标准电话键盘，支持＋＊＃字符
UIKeyboardTypeURL,                    只支持URL字符的URL键盘，支持.com按钮
UIKeyboardTypeNumberPad,              数字键盘
UIKeyboardTypePhonePad,               电话键盘
UIKeyboardTypeNamePhonePad,           支持输入人名的电话键盘
UIKeyboardTypeEmailAddress,           电子邮件键盘
UIKeyboardTypeDecimalPad,             有数字和小数点的数字键盘
UIKeyboardTypeTwitter,                优化的键盘，方便输入@、#字符
UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable,
} UIKeyboardType;

// 设置return键样式
textView.returnKeyType = UIReturnKeyDefault;
// return键有以下几种样式：
enum {
UIReturnKeyDefault,        默认，灰色按钮，标有Return
UIReturnKeyGo,             标有Go的蓝色按钮
UIReturnKeyGoogle,         标有Google的蓝色按钮，用于搜索
UIReturnKeyJoin,           标有Join的蓝色按钮
UIReturnKeyNext,           标有Next的蓝色按钮
UIReturnKeyRoute,          标有Route的蓝色按钮
UIReturnKeySearch,         标有Search的蓝色按钮
UIReturnKeySend,           标有Send的蓝色按钮
UIReturnKeyYahoo,          标有Yahoo的蓝色按钮
UIReturnKeyYahoo,          标有Yahoo的蓝色按钮
UIReturnKeyEmergencyCall,  紧急呼叫按钮
} UIReturnKeyType;

// 设置是否可以拖动
textView.scrollEnabled = YES;
// 设置代理
textView.delegate = self;

// 自定义文本框placeholder
tip = [[UILabel alloc] initWithFrame:CGRectMake(16, 14, 320, 25)];
tip.text = @"您的意见是我们前进的最大动力，谢谢！";
tip.font = [UIFont fontWithName:@"Arial" size:16.5f];
tip.backgroundColor = [UIColor clearColor];
tip.enabled = NO;

// 自定义文本框字数统计
count = [[UILabel alloc] initWithFrame:CGRectMake(270, 170, 35, 20)];
count.text = @"240";
count.textAlignment = NSTextAlignmentRight;
count.font = [UIFont fontWithName:@"Arial" size:15.0f];
count.backgroundColor = [UIColor clearColor];
count.enabled = NO;

// 显示文本框及相关控件
[self.view addSubview:feedback];
[self.view addSubview:tip];
[self.view addSubview:count];

// 限制输入文本长度
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if (range.location < 240)
{
return  YES;
} else {
return NO;
}
}

// 自定义文本框placeholder
- (void)textViewDidChange:(UITextView *)textView
{
count.text = [NSString stringWithFormat:@"%d", 240 - feedback.text.length];
if (textView.text.length == 0)
{
tip.text = @"";
} else {
tip.text = @"";
}
}