根据这里的文档:https://www.parse.com/docs/ios_guide#files-progress/iOS
这是使用完成块和进度块处理文件保存的建议语法。
let str = "Working at Parse is great!"
let data = str.dataUsingEncoding(NSUTF8StringEncoding)
let file = PFFile(name:"resume.txt", data:data)
file.saveInBackgroundWithBlock {
(succeeded: Bool!, error: NSError!) -> Void in
// Handle success or failure here ...
}, progressBlock: {
(percentDone: Int) -> Void in
// Update your progress spinner here. percentDone will be between 0 and 100.
}
但是,XCode 6.2 会引发此错误:
一行中的连续语句必须用“;”分隔
在这一行:
}, progressBlock: {
有人知道如何在这种情况下正确使用 progressBlock 吗?
编辑1:
这是 Obj C 中的示例:
NSData *data = [@"Working at Parse is great!" dataUsingEncoding:NSUTF8StringEncoding];
PFFile *file = [PFFile fileWithName:@"resume.txt" data:data];
[file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
// Handle success or failure here ...
} progressBlock:^(int percentDone) {
// Update your progress spinner here. percentDone will be between 0 and 100.
}];
编辑2:
另一种尝试,不同的错误:
编辑3:
原始代码,但根据评论建议使用 CInt
最佳答案
我在 Objective C 中定义了一个带有方法签名的类:
- (void)saveInBackgroundWithBlock:(void(^)(BOOL succeeded, NSError *error))block progressBlock:(void(^)(int percentDone))progressBlock;
我可以在 Swift 中这样称呼它:
let file = Test()
file.saveInBackgroundWithBlock({(success: Bool, error: NSError!) -> Void in
NSLog("1")
}, progressBlock: { (percentage: CInt) -> Void in
NSLog("2")
})