最近有个需求需要修改UITextField的placeholder文字颜色，在网上找发现有用代码修改的，但是考虑到更加优雅的实现，所以尝试着在storyboard中直接实现，结果竟然真的成功了（原谅我太小白），实现的位置如下：具体步骤：1.在User Defined Runtime Attributes中添加一个Key。2.输入Key Path（这里我们输入_placehold

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {//    if (action == @selector(paste:))//禁止粘贴//        return NO;//    if (action == @selector(select:))// 禁止选择//        return NO;

// 通过创建一个NSString 的category类目实现最后输入的表情的过滤 输入框粘贴功能需要关闭也就是只能输入关闭输入框粘贴功能点击此链接+ (BOOL)isContainsTwoEmoji:(NSString *)string{ __blockBOOL isEomji =NO; [stringenumerateSubstringsInRange:NSMa...

// 类型- (void)textViewDidChange:(UITextView *)textView{    NSRange textRange = [textViewselectedRange];    [textView setText:[selfdisable_emoji:[textView text]]];    [textView

- (void)addNotification {[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];[[NSNotificationCenter

[_number addTarget:self action:@selector(numberAgaintextFieldDidChange:) forControlEvents:UIControlEventEditingChanged];- (void)textViewDidChange:(UITextView *)textView { NSInteger number ...

#import #import @interface QuickBuild : NSObject/** 创建UILabel */+ (UILabel *)quickBuildLableWithFrame:(CGRect)frame                             text:(NSString *)text

#import @interface UIView (Frame)@property (nonatomic,assign) CGFloat x;@property (nonatomic,assign) CGFloat y;@property (nonatomic,assign) CGFloat width;@property (non

// _placeholderLabel UILabel *placeHolderLabel = [[UILabel alloc] init]; placeHolderLabel.text = @"请输入内容"; placeHolderLabel.numberOfLines = 0; placeHolderLabel.textColor = [UIColor li...

是因为使用了IQKeyBoardManager 问题加上这段代码解决-(void)loadView { UIScrollView *scView = [[UIScrollView alloc]initWithFrame:[UIScreen mainScreen].bounds]; self.view = scView;}

// 键盘弹出改变tableview高度- (void)registerKeybordNotification {    NSNotificationCenter *notification = [NSNotificationCenterdefaultCenter];    [notification removeObserver:self];    [

/** * 光标位置输入 * * @param emoji 要输入的内容emoji和字符 */- (void)insertStringWithGuangBiaotext:(UITextView *)textView emoji:(NSString *)emoji { NSRange range = textView.selectedRange; NS...

//初始化textfield并设置位置及大小 UITextField *text = [[UITextField alloc]initWithFrame:CGRectMake(20, 20, 130, 30)]; //设置边框样式，只有设置了才会显示边框样式 text.borderStyle = UITextBorderStyleRoundedRect; typedef e...

[_useRregistered addTarget:self action:@selector(useRregisteredtextFieldDidChange:) forControlEvents:UIControlEventEditingChanged];[_passwordregistered addTarget:self action:@selector(passwordregi

//判断用户输入是否为邮箱- (BOOL) validateEmail: (NSString *) candidate {    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";    NSPredicate *emailTest = [NSPredicate predicateWit

//判断用户输入是否为邮箱- (BOOL) validateEmail: (NSString *) candidate {    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";    NSPredicate *emailTest = [NSPredicate predicateWit

1.//当用户全部清空的时候的时候 会调用-(BOOL)textFieldShouldClear:(UITextField *)textField；2.//可以得到用户输入的字符-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:

#import@interfaceDropDownList:UIView{   UITextField* textField; //文本输入框   NSArray* list;         //下拉列表数据   BOOLshowList;          //是否弹出下拉列表    UITableView*listView; 

[textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];- (void) textFieldDidChange:(UITextField *) TextField{}

NSString *str = _textView.text; str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; //去除掉首尾的空白字符和换行字符 str = [str stringByReplacingOccurrencesO...

#import <UIKit/UIKit.h>NS_ASSUME_NONNULL_BEGINtypedef void (^ResultBlock)(NSString *str , NSDictionary *dic,BOOL isOK);@interface StepField : UIView- (instancetype)initWithFrame:(CGRect)fr...