iphone - 动画 setImage，延迟 setImage

Question

我已经为此苦苦挣扎了几个星期。我有一个文字游戏，它会比较单词，当字母在正确的位置时，它会变成绿色。现在这一切都很好，唯一的事情是我希望这些字母不是同时出现，而是在它们之间有一段时间。我不知道该怎么做，我希望有人能帮助我。为了更清楚，这里有一些代码：

// RANDOM WORD 
unichar aChar7 = [textview.text characterAtIndex:0];
unichar aChar8 = [textview.text characterAtIndex:1];
unichar aChar9 = [textview.text characterAtIndex:2];
unichar aChar10 = [textview.text characterAtIndex:3];
unichar aChar11 = [textview.text characterAtIndex:4];
unichar aChar12 = [textview.text characterAtIndex:5];
//INPUT
unichar aChar1 = [labelsText.text characterAtIndex:0];
unichar aChar2 = [labelsText.text characterAtIndex:1];
unichar aChar3 = [labelsText.text characterAtIndex:2];
unichar aChar4 = [labelsText.text characterAtIndex:3];
unichar aChar5 = [labelsText.text characterAtIndex:4];
unichar aChar6 = [labelsText.text characterAtIndex:5];


if (aChar1 == aChar7){
    [imageview7 setImage:imageview1HG.image];
//(Wait 1 second)
if (aChar2 == aChar8){
    [imageview8 setImage:imageview2HG.image];
///Wait 1 second)
if (aChar3 == aChar9){
    [imageview9 setImage:imageview3HG.image];
//Wait 1 second)
if (aChar4 == aChar10){
    [imageview10 setImage:imageview4HG.image];
//wait 1 second
if (aChar5 == aChar11){
    [imageview11 setImage:imageview5HG.image];
 //wait 1 second
if (aChar6 == aChar12){
    [imageview12 setImage:imageview6HG.image];

我希望有人知道并可以帮助我

Answer 1

使用dispatch_after()：

double delayInSeconds = 1.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
    // code to be executed on the main queue after delay
});