每当我点击按钮flipButton
一次,变量curPage
就会增加4.我想将它递增一。有人能告诉我有什么问题吗?
感谢
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
curPage = 0 ;
NSString * dic = nil;
if ((NSInteger)tempIndex == 0) {
type = @"Fire_";
dic = [NSString stringWithFormat:@"%@%d",type,0];
}
NSString *htmlFile = [[NSBundle mainBundle] pathForResource:dic ofType:@"htm"];
NSString* htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
[contentWebView loadHTMLString:htmlString baseURL:nil];
UIBarButtonItem *flipButton = [[UIBarButtonItem alloc]
initWithTitle:@"Flip"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(flipView)];
self.navigationItem.rightBarButtonItem = flipButton;
}
-(IBAction)flipView{
curPage = curPage + 1;
NSString *path = [NSString stringWithFormat:@"%@%d",type,(int)curPage];
NSString *htmlFile = [[NSBundle mainBundle] pathForResource:path ofType:@"htm"];
NSString* htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
[contentWebView loadHTMLString:htmlString baseURL:nil];
NSLog(path);
}
答案 0 :(得分:2)
我的猜测是,这是因为您在声明int
后curPage
后放了一个星号:
int *curPage;
这也是编译器在将(int)
传递给curPage
stringWithFormat:
添加到int
前面的原因
这声明了一个整数指针,而不是整数。指针按其指向的大小递增,因此在具有32位{{1}}的平台上,它们递增4(32位占用的字节数)。在声明基本类型的变量时,不需要星号。