废话不多说了，先给大家展示效果图。
一，效果图。
二，工程图。
三，代码。
rootviewcontroller.h
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#import <uikit/uikit.h>@interface rootviewcontroller : uiviewcontroller<uitextviewdelegate>@end rootviewcontroller.m- (void)viewdidload{[super viewdidload];// do any additional setup after loading the view.//初始化背景[self addview];}#pragma -mark -functions-(void)addview{uitextview *textview=[[uitextview alloc]initwithframe:cgrectmake(50, 100, 200, 50)];textview.backgroundcolor=[uicolor redcolor];textview.delegate=self;[self.view addsubview:textview];}#pragma -mark -uitextviewdelegate- (void)textviewdidchange:(uitextview *)textview{nsrange textrange = [textview selectedrange];[textview settext:[self disable_emoji:[textview text]]];[textview setselectedrange:textrange];}//禁止输入表情- (nsstring *)disable_emoji:(nsstring *)text{nsregularexpression *regex = [nsregularexpression regularexpressionwithpattern:@"[^\\u0020-\\u007e\\u00a0-\\u00be\\u2e80-\\ua4cf\\uf900-\\ufaff\\ufe30-\\ufe4f\\uff00-\\uffef\\u0080-\\u009f\\u2000-\\u201f\r\n]" options:nsregularexpressioncaseinsensitive error:nil];nsstring *modifiedstring = [regex stringbyreplacingmatchesinstring:textoptions:0range:nsmakerange(0, [text length])withtemplate:@""];return modifiedstring;} |
