如果语句检查NSString等于使用== [英] If statement checking for NSString equality using ==

问题描述

我在一些Objective-c代码中进行服务器调用。如果它返回 @yes，它将执行一个操作。由于某种原因， // DO ACTION HERE 部分从未到达。

I am making a server call in some Objective-c code. If it returns as a @"yes", it will do an action. For some reason, the // DO ACTION HERE part is never reached.

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSString *returnStringResults = returnString;
NSString *yesText = @"yes";

if (returnStringResults == yesText) {
    testLabel.text = @"Success";
    // DO ACTION HERE
}

推荐答案

if ([returnStringResults isEqualToString:yesText]) {
    testLabel.text = @"Success";
    // DO ACTION HERE
}

编辑： NSString * returnStringResults = returnString; 什么都不做。

As bbum pointed out, NSString *returnStringResults = returnString; does nothing.

真的，删除那一行，使用

So really, remove that line and use

if ([returnString isEqualToString:yesText]) {
    testLabel.text = @"Success";
    // DO ACTION HERE
}

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