使用 isEqualToString 比较 NSString
请问，为什么 isEqualToString 不起作用？
- (void)viewDidLoad {
[super viewDidLoad];
extern NSString* globalpassword;
if ([passwo.text isEqualToString: globalpassword]) {
res = [[XMLTestViewController alloc] initWithNibName:@"XMLTestViewController" bundle:nil];
res.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self.view addSubview:res.view];
} else {
NSLog(@"faux");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"chikos"
message:@"Wrong Password" delegate:self cancelButtonTitle:@"Cancel"
otherButtonTitles:@"OK", nil];
[alert show];
[alert release];
}
}
the result is
2011-08-11 17:56:36.543 XMLTest[6389:207] pol
2011-08-11 17:56:36.544 XMLTest[6389:207] pol
2011-08-11 17:56:36.544 XMLTest[6389:207] faux
Please, why doesn't isEqualToString work?
- (void)viewDidLoad {
[super viewDidLoad];
extern NSString* globalpassword;
if ([passwo.text isEqualToString: globalpassword]) {
res = [[XMLTestViewController alloc] initWithNibName:@"XMLTestViewController" bundle:nil];
res.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self.view addSubview:res.view];
} else {
NSLog(@"faux");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"chikos"
message:@"Wrong Password" delegate:self cancelButtonTitle:@"Cancel"
otherButtonTitles:@"OK", nil];
[alert show];
[alert release];
}
}
the result is
2011-08-11 17:56:36.543 XMLTest[6389:207] pol
2011-08-11 17:56:36.544 XMLTest[6389:207] pol
2011-08-11 17:56:36.544 XMLTest[6389:207] faux
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看看你的 NSLog 行；它应该看起来像这样：（
注意@符号！）
编辑这一定意味着您忽略了编译器警告！他们在那里是有原因的；在这种情况下，告诉您向 NSLog 传递了错误的参数。
我敢打赌您也会在
NSLog(cc)和NSLog(bb)行上收到警告？Take a look at your NSLog line; it should look like this :
(notice the @ sign!)
EDIT This must mean that you're ignoring your compiler warnings! They're there for a reason; in this case, telling you that you're passing in the wrong parameter to NSLog.
I bet you're also getting warnings on the
NSLog(cc)andNSLog(bb)lines as well?字符串不同。尝试像这样记录 bb 和 cc：
使用单引号，您可以查看 bb 或 cc 中是否存在意外的空格。
The strings differ. Try logging bb and cc like this:
With the single quotes you can see whether there is unexpected whitespace in either bb or cc.