ios如何将字符串中特定后的字变成红色（ios如何将字符串中特定后的字变成红色）

一，效果图。

二，代码。

viewcontroller.m

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - (void)viewdidload { [super viewdidload]; // do any additional setup after loading the view, typically from a nib. uilabel *testlabel=[[uilabel alloc]initwithframe:cgrectmake(10, 100, 100, 50)]; testlabel.text=@"1234567890"; testlabel.backgroundcolor=[uicolor orangecolor]; [self.view addsubview:testlabel]; [self redxingwithlabel:testlabel atindex:2]; } //将字符串特定的1个字变成红色 - (void)redxingwithlabel:(uilabel *)templabel atindex:(nsinteger)tempindex { nsmutableattributedstring * tempstring = [[nsmutableattributedstring alloc] initwithstring: templabel.text]; [tempstring addattribute:nsforegroundcolorattributename value:[uicolor redcolor] range:nsmakerange(tempindex, 1)]; templabel.attributedtext = tempstring; }