Swift:2 个连续的闭包/块 [英] Swift: 2 consecutive closures/blocks

问题描述

根据此处的文档: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.

this is the suggested syntax to handle file saving with a completion block and progressBlock.

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.
}

然而，XCode 6.2 抛出这个错误:一行中的连续语句必须用';'分隔

However, XCode 6.2 throws this error: Consecutive statements on a line must be separated by ';'

在这一行:

}, progressBlock: {

有谁知道在这种情况下如何正确使用progressBlock?

Anyone know how to properly utilize the progressBlock in this scenario?

这是 Obj C 中的示例:

Edit 1: Here's the sample in Obj C:

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:

另一次尝试，不同的错误:

Another attempt, different error:

编辑 3:原始代码，但根据评论建议使用 CInt

Edit 3: Original code, but with CInt per a comment suggestion

推荐答案

我在 Objective C 中定义了一个带有方法签名的类:

I defined a class in Objective C with the method signature:

- (void)saveInBackgroundWithBlock:(void(^)(BOOL succeeded, NSError *error))block progressBlock:(void(^)(int percentDone))progressBlock;

我可以在 Swift 中这样称呼它:

I can call it like so from Swift:

let file = Test()
file.saveInBackgroundWithBlock({(success: Bool, error: NSError!) -> Void in
        NSLog("1")
    }, progressBlock: { (percentage: CInt) -> Void in
        NSLog("2")
    })

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